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1

The ARM Atmospheric Emitted Radiance Interferometer (AERI): Status and  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The ARM Atmospheric Emitted Radiance Interferometer (AERI): Status and The ARM Atmospheric Emitted Radiance Interferometer (AERI): Status and Preliminary Assessments of Instrument Deployments in 2006 Dedecker, Ralph University of Wisconsin Demirgian, Jack Argonne National Laboratory Knuteson, Robert University Of Wisconsin Revercomb, Henry University of Wisconsin-Madison Tobin, David University of Wisconsin-Madison Turner, David University of Wisconsin-Madison Category: Instruments One of the key operational instruments at the Atmospheric Radiation Measurement Climate Research Facility (ACRF) is the Atmospheric Emitted Radiance Interferometer (AERI). This instrument provides the ARM program with surface-based observations of infrared spectrally resolved radiance from a vertically directed cone with better than 1% accuracy. The data from

2

Deployment of the Polar Atmospheric Emitted Radiance Interferometer (P-AERI) in Eureka, Canada for SEARCH  

E-Print Network [OSTI]

Deployment of the Polar Atmospheric Emitted Radiance Interferometer (P-AERI) in Eureka, Canada operate in the polar darkness when solar transmission instruments are not useful. The University of Idaho's P-AERI instrument was deployed in Eureka, Canada in March 2006. It has been operating nearly

Walden, Von P.

3

Time series analysis of AERI radiances for GCM testing and improvement  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Time series analysis of AERI radiances for GCM testing and improvement Time series analysis of AERI radiances for GCM testing and improvement Dykema, John Harvard University Leroy, Stephen Harvard University Anderson, James Harvard University Tobin, David University of Wisconsin-Madison Knuteson, Robert University Of Wisconsin Revercomb, Henry University of Wisconsin-Madison Category: Radiation High resolution infrared radiances measured by the Atmospheric Emitted Radiance Interferometer (AERI) contained detailed information about the structure and dynamics of temperature, water vapor, and clouds below 3 km. Infrared radiances also contain the signature of radiative forcing by well-mixed gases that constitutes the greenhouse effect. Direct comparison of these radiance observations to similar radiances calculated from output

4

Posters Atmospheric Emitted Radiance Interferometer Data Analysis Methods  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Posters Atmospheric Emitted Radiance Interferometer Data Analysis Methods R. O. Knuteson, W. L. Smith, S. A. Ackerman, H. E. Revercomb, H. Woolf, and H. Howell Cooperative Institute for Meteorological Satellite Studies University of Wisconsin-Madison Madison, Wisconsin Introduction Data from the Atmospheric Emitted Radiance Inter- ferometer (AERI) have been analyzed for the Atmospheric Radiation Measurement (ARM) Program's Fourier Transform Data Analysis Tools science team project under the direction of William L. Smith of the University of Wisconsin-Madison. The data consist of observations of the downwelling infrared emission at the surface from gaseous atmospheric constituents and from cloud and particulate aerosols. The observations are at 0.5 cm-1 spectral resolution over the

5

The Status and Future of AERIs in ARM  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Status and Future of AERIs Status and Future of AERIs in ARM Dave Turner Space Science and Engineering Center University of Wisconsin - Madison Longwave/Microwave Focus Group 11 March 2008 ARM STM, Norfolk, VA Background * Spectrally resolved IR radiances were considered key component of ARM's observational strategy * Stringent requirements placed on absolute radiometric accuracy (1% ambient radiance), spectral accuracy, noise level, and operability * Instrument development was successful! * ARM has 8 AERI systems: * 11 Million calibrated sky spectra have been collected by ARM AERIs (up to Dec 2007) * SGP-01 * SGP-E14 * AMF-M1 * NSA-C1 (ER) * TWP-C2 * TWP-C3 * Spare (NR) * Spare (ER) AERI Interferometer Assembly AERI Interferometer Assembly Bomem Interferometer ABB HBB Optics Optics Bench Bench Shock

6

ARM - Datastreams - aeri01summary  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

summary summary Documentation Data Quality Plots Citation DOI: 10.5439/1025141 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AERI01SUMMARY Atmospheric Emitted Radiance Interferometer (AERI) 01: summary data Active Dates 1995.07.22 - 2014.01.02 Measurement Categories Radiometric Originating Instrument Atmospheric Emitted Radiance Interferometer (AERI) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Ambient blackbody temperature - apex K ABBapexTemp ( time ) Ambient blackbody temperature K ABBbottomTemp ( time ) Ambient blackbody temperature - rim top K ABBtopTemp ( time )

7

Rapid Scan AERI Observations: Benefits and Analysis  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Rapid Scan AERI Observations: Benefits and Analysis Rapid Scan AERI Observations: Benefits and Analysis W. F. Feltz, D. D. Turner, R. O. Knuteson, and R. G. Dedecker Space Science and Engineering Center Cooperative Institute of Mesoscale Meteorological Studies University of Wisconsin-Madison Madison, Wisconsin D. D. Turner Pacific Northwest National Laboratory Richland, Washington Introduction The U.S. Department of Energy's (DOE's) Atmospheric Radiation Measurement (ARM) Program has funded the development of the atmospheric emitted radiance interferometer (AERI). This has led to a hardened, autonomous system that measures downwelling infrared (IR) radiance at high-spectral resolution. Seven AERI systems have been deployed around the world as part of the ARM Program. The initial goal of these instruments was to characterize the clear-sky IR emission from the atmosphere,

8

Posters Atmospheric Emitted Radiance Interferometer: Status and Water Vapor Continuum Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

9 9 Posters Atmospheric Emitted Radiance Interferometer: Status and Water Vapor Continuum Results H. E. Revercomb, R. O. Knuteson, W. L. Smith, F. A. Best, and R. G. Dedecker University of Wisconsin Madison, Wisconsin H. B. Howell National Oceanic and Atmospheric Administration Systems Design and Applications Branch Madison, Wisconsin Introduction Accurate and spectrally detailed observations of the thermal emission from radiatively important atmospheric gases, aerosols, and clouds are now being provided to the Atmospheric Radiation Measurement (ARM) data base by the Atmospheric Emitted Radiance Interferometer (AERI) prototype at the Southern Great Plains Cloud and Radiation Testbed (CART) site. Spectra over the range from 520 to 3000 cm -1 (3 to 19 microns) with a resolution of 0.5 cm

9

ARM - Publications: Science Team Meeting Documents: AERI Thermodynamic  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERI Thermodynamic Profiling VAP Improvements and Status AERI Thermodynamic Profiling VAP Improvements and Status Feltz, Wayne University of Wisconsin Howell, Ben University of Wisconsin-Madison Turner, David Pacific Northwest National Laboratory Mahon, Rick Pacific Northwest National Laboratory Knuteson, Robert University Of Wisconsin The Atmospheric Emitted Radiance Interferometer (AERI) was one of the primary instruments developed under the DOE ARM instrument development program (IDP) to be deployed to the Climate Research Facility (CRF) Southern Great Plains (SGP) central site near Lamont, Oklahoma. A prototype AERI was deployed in March 1993 where it collected data until the first AERI operational instrument replaced it in July 1999. The ARM archive contains AERI data from the ARM CART SGP central facility site from January

10

ARM - VAP Product - aeri01prof3feltz  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Productsaeriprofaeri01prof3feltz Productsaeriprofaeri01prof3feltz Documentation Data Management Facility Plots (Quick Looks) Citation DOI: 10.5439/1027271 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send VAP Output : AERI01PROF3FELTZ Profiles of temperature and water vapor physically retrieved from the AERI spectra Active Dates 2002.04.18 - 2014.01.06 Originating VAP Process AERI Profiles of Water Vapor and Temperature : AERIPROF Description The primary purpose of the "aeriprof3feltz" value-added product (VAP) is to retrieve high temporal resolution temperature (T) and water vapor (q) profiles from Atmospheric Emitted Radiance Interferometer (AERI) observations. Traditionally, temperature and moisture profiles are measured

11

AERI - What, Where, How, and Future Plans  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(AERI) measures the absolute infrared spectral radiance (watts per square meter per steradian per wavenumber) of the sky directly above the instrument. This poster...

12

ARM - Measurement - Longwave spectral radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

spectral radiance spectral radiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave spectral radiance The rate at which the spectrally resolved radiant energy in the longwave portion of the spectrum is emitted in a particular direction per unit area perpendicular to the direction of radiation. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AERI : Atmospheric Emitted Radiance Interferometer ASSIST : Atmospheric Sounder Spectrometer for Infrared Spectral

13

Raman lidar/AERI PBL Height Product  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Planetary Boundary Layer (PBL) heights have been computed using potential temperature profiles derived from Raman lidar and AERI measurements. Raman lidar measurements of the rotational Raman scattering from nitrogen and oxygen are used to derive vertical profiles of potential temperature. AERI measurements of downwelling radiance are used in a physical retrieval approach (Smith et al. 1999, Feltz et al. 1998) to derive profiles of temperature and water vapor. The Raman lidar and AERI potential temperature profiles are merged to create a single potential temperature profile for computing PBL heights. PBL heights were derived from these merged potential temperature profiles using a modified Heffter (1980) technique that was tailored to the SGP site (Della Monache et al., 2004). PBL heights were computed on an hourly basis for the period January 1, 2009 through December 31, 2011. These heights are provided as meters above ground level.

Ferrare, Richard

14

X:\\ARM_19~1\\P225-243.WPD  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERI-X (Atmospheric Emitted Radiance Interferometer - Extended Resolution) and the SORTI (Solar Radiance Transmission Interferometer) are joint projects with the University of...

15

Tropospheric and Lower Stratospheric Ozone Profiles From AERI-X Emission Spectra  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Tropospheric and Lower Stratospheric Ozone Profiles Tropospheric and Lower Stratospheric Ozone Profiles From AERI-X Emission Spectra P. F. Fogal and F. J. Murcray Department of Physics and Astronomy University of Denver Denver, Colorado Introduction The University of Denver Atmospheric Emission Radiometric Interferometer-Extended (AERI-X) has been in regular operation at the Southern Great Plains (SGP) Atmospheric Radiation Measurements (ARM) Program site, conditions permitting, since the mid-1990s. We present here the analysis of several spectra from May 10, 1999, and demonstrate the ability to retrieve the tropospheric ozone profile at the ARM site. While the presence of ozone in the stratosphere is of vital importance for several reasons, in the troposphere, ozone is a pollutant and a powerful oxidizer. For these reasons, it is

16

ARM TR-008  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 An Evaluation of the Nonlinearity Correction Applied to Atmospheric Emitted Radiance Interferometer (AERI) Data Collected by the Atmospheric Radiation Measurement Program...

17

ARM - Field Campaign - AERI-ER Intercomparison IOP  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govCampaignsAERI-ER Intercomparison IOP govCampaignsAERI-ER Intercomparison IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : AERI-ER Intercomparison IOP 2004.01.12 - 2006.06.29 Lead Scientist : David Turner Data Availability Data were collected and submitted to the ARM Archive for IOPs. For data sets, see below. Summary There were three, potentially four, phases to this experiment. The length of time required for each phase was the time needed to ensure at least one severe clear period, which occur relatively frequently in January and February on the North Slope. The phases were: 1) Run the two systems side-by-side in their nominal modes to ensure that the calibration is reproducible. 2) Adjust the set-point of the hot blackbody on the second system from 60

18

Radiance | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

have been developing Radiance for 30 years and continue to do so in coordination with Optics, WINDOW, and EnergyPlus development. In recent years, new Radiance developments have...

19

radiance | OpenEI  

Open Energy Info (EERE)

radiance radiance Dataset Summary Description Freedom Field is a not-for-profit organization formed to facilitate development and commercialization of renewable energy solutions. The organization has installed a variety of renewable energy generating technologies at their facility (located at Rock River Water Reclamation in Rockford, IL), with the intention of serving as a demonstration facility. The facility monitors data (at 5-minute intervals) from a weather station, 12.4 kW of PV panels (56 220-watt panels), a 10kW wind turbine (HAWT), a 1.2 kW wind turbine (VAWT), an absorption cooling system, and biogas burners. Source Freedom Field Date Released July 19th, 2011 (3 years ago) Date Updated Unknown Keywords biogas monitoring data PV radiance solar temperature

20

ARM - Measurement - Longwave narrowband radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Send Measurement : Longwave narrowband radiance The rate at which radiant energy in the longwave portion of the spectrum is emitted in narrow wavelength bands in a...

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

ARM - Measurement - Shortwave spectral radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

: Shortwave spectral radiance The rate at which the spectrally resolved radiant energy in the shortwave portion of the spectrum is emitted in a particular direction per unit...

22

X:\ARM_19~1\P245-258.WPD  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atmospheric Emitted Radiance Interferometer (AERI): Atmospheric Emitted Radiance Interferometer (AERI): Status and the Aerosol Explanation for Extra Window Region Emissions H. E. Revercomb, R. O. Knuteson, F. A. Best, T. P. Dirkx, R. G. Dedecker, R. Garcia, B. A. Whitney, and W. L. Smith University of Wisconsin Madison, Wisconsin H. B. Howell NOAA Systems Design and Applications Branch Boulder, Colorado Introduction High spectral resolution observations of downwelling emission from 3 to l9 microns have been made by the Atmospheric Emitted Radiance Interferometer (AERI) Prototype at the Southern Great Plains (SGP) Cloud and Radiative Testbed (CART) site for over two years. The spectral data set from AERI provides a basis for improving clear sky radiative transfer; determining the radiative impact of clouds, including the derivation of cloud

23

ARM - Datastreams - aerich1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Datastreamsaerich1 Datastreamsaerich1 Documentation Data Quality Plots Citation DOI: 10.5439/1025143 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AERICH1 Atmospheric Emitted Radiance Interferometer (AERI): channel 1 data Active Dates 1994.01.10 - 2014.01.02 Measurement Categories Radiometric Originating Instrument Atmospheric Emitted Radiance Interferometer (AERI) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable AERI instrument unit serial number unitless AERI_unit_number AERI instrument unit serial number unitless AERIunitNumber ( time ) Observation Altitude m Altitude ( time )

24

Radiance: Synthetic Imaging System | Open Energy Information  

Open Energy Info (EERE)

Radiance: Synthetic Imaging System Radiance: Synthetic Imaging System Jump to: navigation, search Tool Summary Name: RADIANCE Agency/Company /Organization: Lawrence Berkeley National Laboratory Sector: Energy Focus Area: Buildings Resource Type: Software/modeling tools User Interface: Desktop Application Website: radsite.lbl.gov/radiance/ Cost: Free References: Radiance[1] Logo: RADIANCE RADIANCE is a highly accurate ray-tracing software system for UNIX computers that is licensed at no cost in source form. Radiance was developed with primary support from the U.S. Department Of Energy and additional support from the Swiss Federal Government. Radiance is a suite of programs for the analysis and visualization of lighting in design. Input files specify the scene geometry, materials, luminaires,time, date

25

Final Report: High Spectral Resolution Atmospheric Emitted Radiance Studies with the ARM UAV  

SciTech Connect (OSTI)

The active participation in the Atmospheric Radiation Measurement (ARM) Unmanned Airborne Vehicle (UAV) science team that was anticipated in the grant proposal was indefinitely delayed after the first year due to a programmatic decision to exclude the high spectral resolution observations from the existing ARM UAV program. However, this report shows that substantial progress toward the science objectives of this grant have made with the help of separate funding from NASA and other agencies. In the four year grant period (including time extensions), a new high spectral resolution instrument has been flown and has successfully demonstrated the ability to obtain measurements of the type needed in the conduct of this grant. In the near term, the third water vapor intensive observing period (WVIOP-3) in October 2000 will provide an opportunity to bring the high spectral resolution observations of upwelling radiance into the ARM program to complement the downwelling radiance observations from the existing ARM AERI instruments. We look forward to a time when the ARM-UAV program is able to extend its scope to include the capability for making these high spectral resolution measurements from a UAV platform.

Revercomb, Henry E.

1999-12-31T23:59:59.000Z

26

ARM - Measurement - Shortwave narrowband radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

narrowband radiance narrowband radiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband radiance A measure of the intrinsic radiant energy flux intensity, at wavelengths between 0.4 and 4 {mu}, emitted by a radiator in a given direction, expressed in units of energy per unit time per unit solid angle. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CSPHOT : Cimel Sunphotometer SWS : Shortwave Spectroradiometer

27

Radiance Solar | Open Energy Information  

Open Energy Info (EERE)

Radiance Solar Radiance Solar Jump to: navigation, search Name Radiance Solar Place Atlanta, Georgia Zip 30318 Product Commercial and residential PV installer based in Atlanta. Coordinates 33.748315°, -84.391109° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.748315,"lon":-84.391109,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

28

Section 23  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Atmospheric Emitted Radiance Interferometer Temperature and Water Vapor Retrievals: Southern Great Plains Cloud and Radiation Testbed Seasonal Statistical Analysis, Monthly Climatic Means for Model Integration, and Future GOES/AERI Retrievals W. F. Feltz, W. L. Smith, R. O. Knuteson, H. E. Revercomb, H. Woolf H. B. Howell and S. Ho Cooperative Institute for Meteorological Satellite Studies Space Science and Engineering Center, University of Wisconsin-Madison Madison, Wisconsin Introduction The Atmospheric Emitted Radiance Interferometer (AERI) (Revercomb et al. 1993) is providing radiances to routinely produce temperature and water vapor retrievals in the first three kilometers of the Earth's atmosphere at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP)

29

Microsoft Word - knuteson-ro.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

10 Years of AERI Data from the DOE ARM 10 Years of AERI Data from the DOE ARM Southern Great Plains Site R. O. Knuteson, F. A. Best, R. G. Dedecker, W. F. Feltz, H. E. Revercomb, and D. C. Tobin University of Wisconsin-Madison Space Science and Engineering Center Madison, Wisconsin Introduction As of January 2004, the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) data archive contained a 10 year record of downwelling infrared (IR) spectral emission measurements at the surface from the atmospheric emitted radiance interferometer (AERI) instrument. The authors have generated a monthly "climatology" of AERI spectral radiances for the 120 months from January 1994 through December 2003 for the DOE ARM Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) central facility (CF) in North Central Oklahoma. This AERI climatology

30

Section 22  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Atmospheric Emitted Radiance Interferometer Status Atmospheric Emitted Radiance Interferometer Status and Quality Measurement Experiment Results R. O. Knuteson, F. A. Best, H. E. Revercomb and B. A. Whitney Space Science and Engineering Center University of Wisconsin - Madison Madison, Wisconsin Instrument Status The atmospheric emitted radiance interferometer (AERI) central facility instrument at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site has been operational since July 1995. This instrument, identified by the serial number AERI-01, is the first of a series of operational instruments designed and built at the University of Wisconsin Space Science and Engineering Center for the Department of Energy (DOE) ARM program under contract to Pacific Northwest National Laboratory. The AERI-01

31

Building Energy Software Tools Directory: Radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radiance Radiance Radiance logo. Advanced lighting simulation and rendering package; calculates spectral radiance values (illuminance & color) and spectral irradiance (illuminance & color) for interior and exterior spaces considering electric lighting, daylight and interreflection. Used by architects and designers to predict illumination, visual quality and appearance of design spaces. Used by researchers to evaluate new lighting and daylighting technologies and study visual comfort and similar quantities related to the visual environment. Keywords lighting, daylighting, rendering Validation/Testing N/A Expertise Required High level of computer literacy required; 4 days training, minimum. Users Over 200. Audience Daylighting, lighting, and architectural designers.

32

ARM - Datastreams - aerich2  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Datastreamsaerich2 Datastreamsaerich2 Documentation Data Quality Plots Citation DOI: 10.5439/1025144 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AERICH2 Atmospheric Emitted Radiance Interferometer (AERI): channel 2 data Active Dates 1994.01.10 - 2014.01.02 Measurement Categories Radiometric Originating Instrument Atmospheric Emitted Radiance Interferometer (AERI) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable AERI instrument unit serial number unitless AERIunitNumber ( time ) Observation Altitude m Altitude ( time ) Temperature of the AERI blackbody support structure K BBsupportStructureTemp ( time )

33

The Radiance Process: Water and Chemical Free Cleaning  

E-Print Network [OSTI]

Radiance Services Company manages a new technology called the Radiance Process, a dry non-toxic technology for surface cleaning. The Radiance Process received the National Pollution Prevention Roundtable's 1997 Most Valuable Pollution Prevention...

Robison, J. H.

34

The Constant Radiance Term Lszl Neumann 1  

E-Print Network [OSTI]

is zero. The self- 1 Email: neumann@hungary.net #12; L. Neumann: The Constant Radiance Term - 2 information, nor the calculation of form factors. A constant radiance is extracted from the solution in every of the residuum problem is zero. The self-emitting term of the residuum problem can either be positive or negative

35

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Evidence for Aerosol Effects on AERI Clear-Sky Radiance at the SGP Evidence for Aerosol Effects on AERI Clear-Sky Radiance at the SGP Ma, Y., and Ellingson, R.G., University of Maryland Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Emitted Radiance Interferometer (AERI) Line-by-Line Radiative Transfer Model (LBLRTM) Quality Measurement Experiment (QME) 10-micron window residuals have been examined relative to the Multifilter Rotating Shadowband Radiometer (MFRSR) 0.87-micron optical depth for clear-sky periods during 1997-98. The analysis shows an increasing aerosol influence on the downwelling radiance with aerosol optical depth for columnar water totals below about 3 cm. Above 3 cm, the residuals become negatively correlated with both aerosol optical depth and precipitable water. This change in the characteristics suggests that the current LBLRTM

36

Microsoft Word - best-fa.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Catastrophic Failures and a Robust Fix of the Atmospheric Catastrophic Failures and a Robust Fix of the Atmospheric Emitted Radiance Interferometer (AERI) Detector Dewars F. A. Best, D. P. Adler,N. N. Ciganovich, R. G. Dedecker, R. O. Knuteson, and H. E. Revercomb University of Wisconsin - Madison Madison, Wisconsin Introduction The Atmospheric Emitted Radiance Interferometer (AERI) is a ground-based infrared spectroradiometer that was developed at the University of Wisconsin Space Science and Engineering Center (SSEC) for the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) program to measure the downwelling infrared emission from CO 2 , H 2 O, and clouds. Nine continuously operating AERIs are deployed throughout the world, including Lamont, Oklahoma; Barrow, Alaska; Madison, Wisconsin;

37

Dual surface interferometer  

DOE Patents [OSTI]

A double-pass interferometer is provided which allows direct measurement of relative displacement between opposed surfaces. A conventional plane mirror interferometer may be modified by replacing the beam-measuring path cube-corner reflector with an additional quarterwave plate. The beam path is altered to extend to an opposed plane mirrored surface and the reflected beam is placed in interference with a retained reference beam split from dual-beam source and retroreflected by a reference cube-corner reflector mounted stationary with the interferometer housing. This permits direct measurement of opposed mirror surfaces by laser interferometry while doubling the resolution as with a conventional double-pass plane mirror laser interferometer system.

Pardue, R.M.; Williams, R.R.

1980-09-12T23:59:59.000Z

38

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Properties Journal Reference: Turner, D.D., S.A. Ackerman, B.A. Baum, H.E. Revercomb, and P. Yang, 2003: "Cloud Phase Determination Using Ground-Based AERI Observations at SHEBA," Journal of Applied Meteorology 42(6):701-715. The SHEBA experiment in Barrow, Alaska used data collected by the ground-based radiation observations from the Atmospheric Emitted Radiance Interferometer (AERI). (Photo Credit: SHEBA Project Office) Key Contributors: S.A. Ackerman, B.A. Baum, H.E. Revercomb, P. Yang, In the frigid environs of the Acrtic, ARM scientists at the North Slope of

39

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM AERI with Trent FTS Spectra for the ARM AERI with Trent FTS Spectra for the Measurement of Greenhouse Radiative Fluxes W. F. J. Evans and E. Puckrin Trent University Peterborough, Ontario T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington Introduction For the past several years, measurements of the atmospheric thermal infrared spectra have been made at the mid-latitude site of Trent University in Peterborough, Ontario, at a high resolution of 0.25 cm -1 . These measurements are similar to those conducted with the Atmospheric Emitted Radiance Interferometer (AERI) instrument at the Atmospheric Radiation Measurement (ARM) Program sites, which has a lower resolution of 1 cm -1 . We compare the ARM AERI spectra with those measured at Trent University for clear-sky conditions, and use the same analysis techniques on both spectra to derive

40

Knuteson-RO  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERIs for ARM: Accuracy and Applications AERIs for ARM: Accuracy and Applications R. O. Knuteson, F. A. Best, R. G. Dedecker, D. H. DeSlover, T. P. Dirkx, W. F. Feltz, R. K. Garcia, H. B. Howell, H. E. Revercomb, and D. C. Tobin University of Wisconsin - Madison Cooperative Institute for Meteorological Satellite Studies Madison, Wisconsin Introduction Measurements from the atmospheric emitted radiance interferometer (AERI) are used within the Atmospheric Radiation Measurement (ARM) Program to improve our understanding of the atmospheric processes important for atmospheric radiation. One of the earliest ARM goals was the collection of high spectral resolution emission data for validation of radiative transfer model (RTM) calculations in the infrared (IR). Over the years, the list of applications of AERI data have grown to include remote

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Posters Residual Analysis of Surface Spectral Radiances Between...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 Posters Residual Analysis of Surface Spectral Radiances Between Instrument Observations and Line-by-Line Calculations S. A. Clough and P. D. Brown Atmospheric and Environmental...

42

Section 11  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Implications for Atmospheric State Specification from the Implications for Atmospheric State Specification from the AERI/LBLRTM Quality Measurement Experiment and the MWR/LBLRTM Quality Measurement Experiment S.A. Clough and P.D. Brown Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts J.C. Liljegren, T.R. Shippert, and D.D. Turner Pacific Northwest National Laboratory Richland, Washington R.O. Knuteson, H.E. Revercomb, and W.L. Smith University of Wisconsin Madison, Wisconsin Introduction The ongoing Atmospheric Emitted Radiance Interferometer (AERI)/Line By Line Radiative Transfer Model (LBLRTM) Quality Measurement Experiment (QME), in which the spectral residuals between the downwelling longwave radiance measured by the University of Wisconsin AERI at the Central Facility of the Southern Great Plains (SGP) site and

43

shippert-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

87 87 Spectral Cloud Emissivities from LBLRTM/AERI QME T. R. Shippert Pacific Northwest National Laboratory Richland, Washington S. A. Clough and P. D. Brown Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts W. L. Smith NASA-Langley Research Center Hampton, Virginia R. O. Knuteson and S. A. Ackerman University of Wisconsin Madison, Wisconsin Introduction Using spectral radiance measurements from the atmospheric emitted radiance interferometer (AERI) and calculations from the Line-by-Line Radiative Transfer Model (LBLRTM), cloud emissivities can be derived in the window region from 700 cm -1 to 1250 cm -1 . The AERI/LBLRTM Quality Measurement Experiment (QME) (Brown 1998) is currently designed to run under clear-sky conditions; the LBLRTM does not calculate the effects of

44

feltz-99.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

+ GOES Retrievals at the SGP ARM Site: SCM Data + GOES Retrievals at the SGP ARM Site: SCM Data Assimilation and Convective Forecasting Utility W. F. Feltz, R. O. Knuteson, H. E. Revercomb, and H. B. Howell University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies Madison, Wisconsin Introduction Four additional Atmospheric Emitted Radiance Interferometer (AERI) systems have been deployed at the U.S. Department of Energy's (DOE's) Atmospheric Radiation Measurement (ARM) Southern Great Plains Cloud And Radiation Testbed (SGP CART) site boundary facilities. The AERI + GOES (Geostationary Operational Environmental Satellite) temperature and water vapor retrieval product is now operational at Pacific Northwest National Laboratory (PNNL) allowing continuous monitoring of

45

Multipulsed dynamic moire interferometer  

DOE Patents [OSTI]

An improved dynamic moire interferometer comprised of a lasing medium providing a plurality of beams of coherent light, a multiple q-switch producing multiple trains of 100,000 or more pulses per second, a combining means collimating multiple trains of pulses into substantially a single train and directing beams to specimen gratings affixed to a test material, and a controller, triggering and sequencing the emission of the pulses with the occurrence and recording of a dynamic loading event.

Deason, Vance A. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

46

Acceleration of the matrix multiplication of Radiance three phase  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Acceleration of the matrix multiplication of Radiance three phase Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer Title Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer Publication Type Journal Article LBNL Report Number LBNL-6461E Year of Publication 2013 Authors Zuo, Wangda, Andrew McNeil, Michael Wetter, and Eleanor S. Lee Journal Journal of Building Performance Simulation Keywords daylighting simulation, graphics processing unit, multicore central processing unit, OpenCL, parallel computing Abstract Building designers are increasingly relying on complex fenestration systems to reduce energy consumed for lighting and HVAC in low energy buildings. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex fenestration systems. Depending on the configurations, the simulation can take hours or even days using a personal computer. This paper describes how to accelerate the matrix multiplication portion of a Radiance three-phase daylight simulation by conducting parallel computing on heterogeneous hardware of a personal computer. The algorithm was optimized and the computational part was implemented in parallel using OpenCL. The speed of new approach was evaluated using various daylighting simulation cases on a multicore central processing unit and a graphics processing unit. Based on the measurements and analysis of the time usage for the Radiance daylighting simulation, further speedups can be achieved by using fast I/O devices and storing the data in a binary format.

47

ARM - Datastreams - aeriengineer  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Datastreamsaeriengineer Datastreamsaeriengineer Documentation Data Quality Plots Citation DOI: 10.5439/1025145 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AERIENGINEER Atmospheric Emitted Radiance Interferometer (AERI): engineering data Active Dates 1997.10.21 - 2014.01.02 Measurement Categories Radiometric Originating Instrument Atmospheric Emitted Radiance Interferometer (AERI) Measurements Only measurements considered scientifically relevant are shown below by default. Show all measurements Measurement Units Variable Ambient blackbody temperature - apex K ABBapexTemp ( time ) Ambient Blackbody apex temperature weight /1 ABBapexTempWeight ( time ) Ambient blackbody temperature K ABBbottomTemp ( time )

48

Vision Office Products  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1.1 1.1 The History of the University of Wisconsin Atmospheric Emitted Radiance Interferometer (AERI) Prototype During the Period April 1994 Through July 1995 June 1999 (Manuscript received November 1995, in final form December 1995) R. Knuteson B. Whitney H. Revercomb F. Best Prepared by the Space Science and Engineering Center, University of Wisconsin - Madison Work supported by the U.S. Department of Energy, Office of Energy Research, Office of Health and Environmental Research Knuteson et al., June 1999, ARM TR-001.1 iii Abstract This document describes reprocessing of data collected with the University of Wisconsin (UW) Atmospheric Emitted Radiance Interferometer (AERI) prototype at the U.S. Department of Energy

49

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERI-Lidar Retrievals of Ice Cloud Physical Properties, Including the First AERI-Lidar Retrievals of Ice Cloud Physical Properties, Including the First Estimates of Photon Tunneling Contributions to Absorption Mitchell, D.L.(a) and DeSlover, D.H.(b), Desert Research Institute (a), Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Atmospheric Emitted Radiance Interferometer (AERI) and the High Spectral Resolution Lidar (HSRL) have been used to determine the spectral dependence of alpha in the window region (8.5-12.5 micron wavelength), where alpha is the ratio of optical depth at a visible wavelength to infrared absorption optical depth for a cirrus cloud. Using alpha and cloud emissivity measurements, it is generally possible to retrieve effective

50

Compact portable diffraction moire interferometer  

DOE Patents [OSTI]

A compact and portable moire interferometer used to determine surface deformations of an object. The improved interferometer is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent wave splitters, and collimating lenses directing the split beam at one or more specimen gratings. Observation means including film and video cameras may be used to view and record the resultant fringe patterns.

Deason, Vance A. (Shelley, ID); Ward, Michael B. (Idaho Falls, ID)

1989-01-01T23:59:59.000Z

51

Compact portable diffraction moire interferometer  

DOE Patents [OSTI]

A compact and portable moire interferometer used to determine surface deformations of an object. The improved interferometer is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent wave splitters, and collimating lenses directing the split beam at one or more specimen gratings. Observations means including film and video cameras may be used to view and record the resultant fringe patterns. 7 figs.

Deason, V.A.; Ward, M.B.

1988-05-23T23:59:59.000Z

52

CIMEL Measurements of Zenith Radiances at the ARM SGP Site  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

CIMEL Measurements of Zenith Radiances CIMEL Measurements of Zenith Radiances at the ARM SGP Site W. J. Wiscombe National Aeronautics and Space Administration Goddard Space Flight Center Climate and Radiation Branch Greenbelt, Maryland A. Marshak and K. Evans Joint Center for Earth Systems Technology University of Maryland Baltimore, Maryland Y. Knyazikhin Department of Geography Boston University Boston, Massachusetts H. W. Barker Environment Canada Downsview, Ontario, Canada C. F. Pavloski Department of Meteorology Pennsylvania State University University Park, Pennsylvania A. B. Davis Los Alamos National Laboratory Space and Remote Sensing Sciences Los Alamos, New Mexico M. Miller Brookhaven National Laboratory Upton, New York Introduction The objective of our study is to exploit the sharp spectral contrast in vegetated surface reflectance across

53

Measuring atomic properties with an atom interferometer  

E-Print Network [OSTI]

Two experiments are presented which measure atomic properties using an atom interferometer. The interferometer splits the sodium de Broglie wave into two paths, one of which travels through an interaction region. The paths ...

Roberts, Tony David, 1972-

2002-01-01T23:59:59.000Z

54

knuteson-99.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Observations at the ARM SGP, NSA, Observations at the ARM SGP, NSA, and TWP CART Sites R. O. Knuteson, H. E. Revercomb, F. A. Best, R. G. Dedecker, R. G. Garcia, H. B. Howell, D. C. Tobin, and V. P. Walden Space Science and Engineering Center University of Wisconsin Madison, Wisconsin Introduction A total of eight Atmospheric Emitted Radiance Interferometer (AERI) systems, developed at the University of Wisconsin-Madison Space Science and Engineering Center (UW-SSEC) for the measurement of the downwelling infrared radiance spectrum, have now been deployed at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP), Tropical Western Pacific (TWP), and North Slope of Alaska (NSA) Cloud And Radiation Testbed (CART) sites (Revercomb 1993). In this paper we will review the status and recent results obtained from these AERI

55

International Satellite Cloud Climatology Project (ISCCP) Radiance Calibration Report  

E-Print Network [OSTI]

This document describes the radiance calibrations used for all ISCCP Stage B3 data for the period July 1983 through June 1991 (Schiffer and Rossow 1985; Rossow et al. 1987; Brest and Rossow 1992; Desormeaux et al. 1992). Calibration is reported in three stages, called nominal, normalized and absolute. Equations and tables in the following sections define each of these calibrations. 1.1. NOMINAL CALIBRATION The nominal calibration (first set of tables on Stage B3 data tapes) represents the best information available at the start of processing of data from a particular satellite, usually the pre-launch calibration supplied by the satellite operator for the visible (VIS) channel (and other channels at solar wavelengths) and an equation or table used to interpret on-board calibration information for the infrared (IR) channel (and other channels at thermal infrared wavelengths). Specific details are given for each satellite in sections to follow. In this document, VIS radiances are given as "scaled radiances", L

William Rossow; Yves Desormeaux; Christopher L. Brest; Alison Walker

1992-01-01T23:59:59.000Z

56

turner-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Long-Term Analyses of Observed and Line-by-Line Calculations of Longwave Surface Spectral Radiance and the Effect of Scaling the Water Vapor Profile D. D. Turner and T. R. Shippert Pacific Northwest National Laboratory Richland, Washington P. D. Brown and S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts R. O. Knuteson and H. E. Revercomb University of Wisconsin Madison, Wisconsin W. L. Smith NASA-Langley Research Center Hampton, Virginia Abstract A Quality Measurement Experiment (QME) comparing longwave radiance at the surface observed by the atmospheric emitted radiance interferometer (AERI) instru- ment with calculated radiance from the line-by-line radiative transfer model (LBLRTM) has generated almost 4 years of data and statistics. These statistics have been used to assess

57

Remote sensing of Greenland ice sheet using multispectral near-infrared and visible radiances  

E-Print Network [OSTI]

Remote sensing of Greenland ice sheet using multispectral near-infrared and visible radiances Petr remote-sensing algorithm that utilizes reflected visible and near-infrared radiation to discriminate using multispectral near-infrared and visible radiances, J. Geophys. Res., 112, D24S20, doi:10

Dozier, Jeff

58

Quantum noise in optical interferometers  

SciTech Connect (OSTI)

We study the photon counting noise in optical interferometers used for gravitational wave detection. In order to reduce quantum noise, a squeezed vacuum is injected into the usually unused input port. It is investigated under which conditions the gravitational wave signal may be amplified without increasing counting noise concurrently. Such a possibility was suggested as a consequence of the entanglement of the two output ports of a beam splitter. We find that amplification without concurrent increase of noise is not possible for reasonable squeezing parameters. Photon distributions for various beam splitter angles and squeezing parameters are calculated.

Voronov, Volodymyr G.; Weyrauch, Michael [Faculty of Physics, Taras Shevchenko National University of Kyiv, 03022 Kyiv (Ukraine); Physikalisch-Technische Bundesanstalt, D-38116 Braunschweig (Germany)

2010-05-15T23:59:59.000Z

59

X-ray shearing interferometer  

DOE Patents [OSTI]

An x-ray interferometer for analyzing high density plasmas and optically opaque materials includes a point-like x-ray source for providing a broadband x-ray source. The x-rays are directed through a target material and then are reflected by a high-quality ellipsoidally-bent imaging crystal to a diffraction grating disposed at 1.times. magnification. A spherically-bent imaging crystal is employed when the x-rays that are incident on the crystal surface are normal to that surface. The diffraction grating produces multiple beams which interfere with one another to produce an interference pattern which contains information about the target. A detector is disposed at the position of the image of the target produced by the interfering beams.

Koch, Jeffrey A. (Livermore, CA)

2003-07-08T23:59:59.000Z

60

Radiance: Science and Stagecraft Come Together via Alan Alda and Marie  

Broader source: Energy.gov (indexed) [DOE]

Radiance: Science and Stagecraft Come Together via Alan Alda and Radiance: Science and Stagecraft Come Together via Alan Alda and Marie Curie Radiance: Science and Stagecraft Come Together via Alan Alda and Marie Curie May 27, 2011 - 1:30pm Addthis Alan Alda | Photo Courtesy of www.alanalda.com Alan Alda | Photo Courtesy of www.alanalda.com Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science They might appear to have little in common. She received two Nobel Prizes. He won six Emmys. She was born in Poland and made her name in Paris. He was born in New York City, and made his fame in Hollywood. Despite their differences, Marie Curie and Alan Alda will be coming together on opening night of the upcoming World Science Festival, through a special reading of his first play, Radiance: The Passion of Marie Curie.

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Radiance: Science and Stagecraft Come Together via Alan Alda and Marie  

Broader source: Energy.gov (indexed) [DOE]

Radiance: Science and Stagecraft Come Together via Alan Alda and Radiance: Science and Stagecraft Come Together via Alan Alda and Marie Curie Radiance: Science and Stagecraft Come Together via Alan Alda and Marie Curie May 27, 2011 - 1:30pm Addthis Alan Alda | Photo Courtesy of www.alanalda.com Alan Alda | Photo Courtesy of www.alanalda.com Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science They might appear to have little in common. She received two Nobel Prizes. He won six Emmys. She was born in Poland and made her name in Paris. He was born in New York City, and made his fame in Hollywood. Despite their differences, Marie Curie and Alan Alda will be coming together on opening night of the upcoming World Science Festival, through a special reading of his first play, Radiance: The Passion of Marie Curie.

62

A retrieval of coastal water constituent concentrations by least-squares inversion of a radiance model  

SciTech Connect (OSTI)

A three-component model of water color including phytoplankton pigment, dissolved organic matter (DOM) and suspended sediments has been developed and applied to coastal waters. A feature of the model is the possibility of varying the parameters describing the spectral backscatter of sediment and the spectral absorption of DOM when inverting the water-leaving radiance model. A linear least-squares technique is used to retrieve optical properties from the water-leaving radiance model. The radiance model is inverted to obtain the optical properties for each set of the parameter values. The set providing the minimum standard error of least squares inversion is taken as the final solution. An analysis of sensitivity of the solution to random radiance measurement errors was carried out. The application of the approach to coastal waters subject to tidal resuspension is discussed.

Vasilkov, A.P. [Management Unit of the Mathematical Models of the North Sea and Scheldt Estuary, Brussels (Belgium)

1997-08-01T23:59:59.000Z

63

CIMEL SUN PHOTOMETERS: UPDATES ON NEW DEPLOYMENTS AND CLOUD MODE ZENITH RADIANCE DATA  

E-Print Network [OSTI]

CIMEL SUN PHOTOMETERS: UPDATES ON NEW DEPLOYMENTS AND CLOUD MODE ZENITH RADIANCE DATA Richard of Science ABSTRACT Since March 1998, ARM has deployed Cimel Sun PHOTometers (CSPHOT) at several but not all

64

Quantum correlations in a noisy neutron interferometer  

E-Print Network [OSTI]

We investigate quantum coherences in the presence of noise by entangling the spin and path degrees of freedom of the output neutron beam from a noisy three-blade perfect crystal neutron interferometer. We find that in the ...

Wood, Christopher J.

65

Active noise cancellation in a suspended interferometer  

E-Print Network [OSTI]

We demonstrate feed-forward vibration isolation on a suspended Fabry-Perot interferometer using Wiener filtering and a variant of the common least mean square adaptive filter algorithm. We compare the experimental results ...

Driggers, Jennifer C.

66

fogal-99  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Temperature and Water Vapor Profile Retrievals from Temperature and Water Vapor Profile Retrievals from AERI-X High Spectral Resolution Emission Spectra P. F. Fogal, F. J. Murcray, and R. Blatherwick Department of Physics and Astronomy University of Denver Denver, Colorado Introduction The University of Denver Atmospheric Emission Radiance Interferometer-Extended (AERI-X) produces calibrated 0.1 cm -1 resolution spectra of the downwelling infrared emission of the atmosphere. These spectra are used to retrieve temperature and water vapor profiles for the lower part of the atmosphere with the optimal estimation spectral fitting routine known as SEASCRAPE (Sequential Evaluation Algorithm for Simultaneous and Concurrent Retrieval of Atmospheric Parameter Estimates). SEASCRAPE Details SEASCRAPE was originally developed at the National Aeronautics and Space Administration's

67

deslover-99.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cloud Optical Depth Retrieval Cloud Optical Depth Retrieval From MPL-Measured Cloud Boundaries D. H. DeSlover University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies Madison, Wisconsin W. L. Smith National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The ability to derive cloud microphysical properties from Atmospheric Emitted Radiance Interferometer (AERI) data has improved with the recent addition of cloud boundaries that are determined from the Cloud and Radiation Testbed (CART) Micropulse Lidar (MPL) measurements. A series of 18 microwindows were chosen to measure cloud emission within the infrared atmospheric window (8 micron to 12 micron) from the AERI data. These spectral regions represent the least contaminated

68

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Central FacilityInstruments Central FacilityInstruments SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Instruments : Central Facility [ Single installation ] ACSM Aerosol Chemical Speciation Monitor Aerosols Browse Data [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] AOS Aerosol Observing System Aerosols Browse Plots Browse Data [ Single installation ] BRS Broadband Radiometer Station Radiometric Browse Plots Browse Data [ Single installation ] BSRN Baseline Solar Radiation Network

69

ARM - Instrument Location Table  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govInstrumentsLocation Table govInstrumentsLocation Table Instruments Location Table Contacts Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument Locations Site abbreviations explained in the key. Instrument Name Abbreviation NSA SGP TWP AMF C1 C2 EF BF CF EF IF C1 C2 C3 EF IF Aerosol Chemical Speciation Monitor ACSM Atmospheric Emitted Radiance Interferometer AERI Aethalometer AETH Ameriflux Measurement Component AMC Aerosol Observing System AOS Meteorological Measurements associated with the Aerosol Observing System AOSMET Broadband Radiometer Station BRS

70

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AlaskaInstruments AlaskaInstruments NSA Related Links Facilities and Instruments Barrow Atqasuk ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Images Information for Guest Scientists Contacts Instruments : North Slope Alaska [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] AMC Ameriflux Measurement Component Radiometric, Surface/Subsurface Properties Browse Data [ Single installation ] AOS Aerosol Observing System Aerosols Browse Data [ Single installation ] CCN Cloud Condensation Nuclei Particle Counter Aerosols Browse Data [ Single installation ] CLAP Continuous Light Absorption Photometer Aerosols Browse Data [ Single installation ] CPC Condensation Particle Counter Aerosols Browse Data

71

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Darwin SiteInstruments Darwin SiteInstruments TWP Related Links Facilities and Instruments Manus Island Nauru Island Darwin, AUS ES&H Guidance Statement Operations Science Field Campaigns Year of Tropical Convection Visiting the Site TWP Fact Sheet Images Information for Guest Scientists Contacts Instruments : Central Facility, Darwin, Australia [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] CSPHOT Cimel Sunphotometer Aerosols, Radiometric Browse Data [ Single installation ] DISDROMETER Impact Disdrometer Surface Meteorology Browse Plots Browse Data [ Single installation ] DL Doppler Lidar Cloud Properties Browse Data [ Single installation ] GNDRAD Ground Radiometers on Stand for Upwelling Radiation Radiometric Browse Plots

72

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PlainsInstruments PlainsInstruments SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Instruments : Southern Great Plains [ Single installation ] ACSM Aerosol Chemical Speciation Monitor Aerosols Browse Data [ Installed at 5 facilities ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] AOS Aerosol Observing System Aerosols Browse Plots Browse Data [ Single installation ] BRS Broadband Radiometer Station Radiometric Browse Plots Browse Data [ Single installation ] BSRN Baseline Solar Radiation Network

73

ACARS Aerodynamic (Research Incorporated) Communication and Recording System  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ix ix Acrononyms and Abbreviations Acronyms and Abbreviations ACARS Aerodynamic (Research Incorporated) Communication and Recording System ACSYS Arctic Climate System Study AER Atmospheric Environmental Research, Inc. AERI Atmospheric Emitted Radiance Interferometer AFOSR Air Force Office of Scientific Research AGARD Advisory Group for Aerospace Research and Development ALFA AER Local Forecast and Assimilation (model) AMIP Atmospheric Model Intercomparison Project ARCS Atmosphere Radiation and Cloud Stations ARCSS Arctic System Science (NSF) ARCSYM Arctic Regional Climate System Model ARINC Aerodynamic Research Incorporated Communication ARM Atmospheric Radiation Measurement program AS anvil stratus ASTER Atmosphere-Surface Turbulent Exchange Research ASTEX Altantic Stratocumulus Transition EXperiment

74

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PacificInstruments PacificInstruments TWP Related Links Facilities and Instruments Manus Island Nauru Island Darwin, AUS ES&H Guidance Statement Operations Science Field Campaigns Year of Tropical Convection Visiting the Site TWP Fact Sheet Images Information for Guest Scientists Contacts Instruments : Tropical Western Pacific [ Installed at 3 facilities ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Installed at 2 facilities ] CSAPR C-Band ARM Precipitation Radar Cloud Properties Browse Data [ Installed at 3 facilities ] CSPHOT Cimel Sunphotometer Aerosols, Radiometric Browse Data [ Single installation ] DISDROMETER Impact Disdrometer Surface Meteorology Browse Plots Browse Data [ Single installation ] DL Doppler Lidar Cloud Properties Browse Data [ Installed at 3 facilities ]

75

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Point Reyes National Seashore, Point Reyes National Seashore, CaliforniaInstruments Point Reyes Deployment AMF Home Point Reyes Home Data Plots and Baseline Instruments Experiment Planning MASRAD Proposal Abstract and Related Campaigns Outreach Posters Climate Research at Point Reyes National Seashore (horizontal) Climate Research at Point Reyes National Seashore (vertical) News Campaign Images Instruments : Point Reyes CA, USA [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] AOS Aerosol Observing System Aerosols Browse Data [ Single installation ] CCN Cloud Condensation Nuclei Particle Counter Aerosols Browse Data [ Single installation ] ECOR Eddy Correlation Flux Measurement System Surface/Subsurface Properties Browse Plots

76

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Oliktok Point, Oliktok Point, AlaskaInstruments Oliktok Deployment AMF Home Oliktok Home Deployment Operations Baseline Instruments and Data Plots at the Archive Outreach News & Press New Sites Fact Sheet (PDF, 1.6MB) Images Contacts Fred Helsel, AMF Operations Lynne Roeder, Media Contact Hans Verlinde, Principal Investigator Instruments : Oliktok Point, Alaska [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Not Online [ Single installation ] CSAPR C-Band ARM Precipitation Radar Cloud Properties Not Online [ Single installation ] CSPHOT Cimel Sunphotometer Aerosols Browse Data [ Single installation ] DL Doppler Lidar Cloud Properties Not Online [ Single installation ] ECOR Eddy Correlation Flux Measurement System Surface/Subsurface Properties Not Online [ Single installation ]

77

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Instrument Cross-Comparisons and Automated Quality Instrument Cross-Comparisons and Automated Quality Control of Atmospheric Radiation Measurement Data S. Moore and G. Hughes ATK Mission Research Santa Barbara, California Introduction Within the Atmospheric Radiation Measurement (ARM) instrument network, several different systems often measure the same quantity at the same site. For example, several ARM instruments measure time- series profiles of the atmosphere that were previously available only from balloon-borne radiosonde systems. These instruments include the Radar Wind Profilers (RWP) with Radio-Acoustic Sounding Systems (RASS), the Atmospheric Emitted Radiance Interferometer (AERI), the Microwave Radiometer Profiler (MWRP), and the Raman Lidar (RL). ARM researchers have described methods for direct

78

clough-99.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Effect on the Calculated Spectral Surface Radiances Effect on the Calculated Spectral Surface Radiances Due to MWR Scaling of Sonde Water Vapor Profiles S. A. Clough and P. D. Brown Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts J. C. Liljegren The Center for Non-Destructive Evaluation Applied Sciences Complex II Ames, Iowa D. D. Turner and T. R. Shippert Pacific Northwest National Laboratory Richland, Washington D. C. Tobin, H. E. Revercomb, and R. O. Knuteson Space Science and Engineering Center University of Wisconsin-Madison Madison, Wisconsin Introduction The accuracy limitation of the Atmospheric Emitted Radiance Interferometer/Line-by-Line Radiative Transfer Model (AERI/LBLRTM) Quality Measurement Experiment (QME) is principally attributable to uncertainties in the measurement of atmospheric water vapor. The QME is a closure experiment on

79

Section 18  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 1 Atmospheric Emitted Radiance Interferometer Temperature and Water Vapor Retrievals: Improvements Using an Integrated Profile Retrieval Approach W. Feltz, W. L. Smith, R. O. Knuteson, and B. Howell University of Wisconsin-Madison Madison, Wisconsin Introduction A major focus of the U. S. Department of Energy (DOE) Atmospheric Radiation Measurement Program (ARM) is to best characterize the thermodynamic state of the atmosphere using a suite of in situ and remote sensing instrumentation. The goal is to take advantage of each property measured by the instruments to provide a clear picture of atmospheric state. An Atmospheric Emitted Radiance Interferometer (AERI) has now been operating nearly continuously since December 1993, obtaining high-resolution infrared atmospheric spectra.

80

Section 26  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5 5 Atmospheric Radiation Measurement Science Applications of Atmospheric Emitted Radiance Interferometer Measurements W. L. Smith, S. A. Ackerman, D. H. DeSlover, W. F. Feltz, S. Ho, R. O. Knuteson and H. E. Revercomb Cooperative Institute for Meteorological Satellite Studies Space Science and Engineering Center University of Wisconsin-Madison Madison, Wisconsin S. A. Clough Atmospheric Environmental Research, Inc. Cambridge, Massachusetts Atmospheric Emitted Radiance Interferometer (AERI) data systems may not be available (e.g., the boundary sites of the are being used to study meteorological processes in the Southern Great Plains [SGP] CART). This technique Planetary Boundary Layer (PBL), the quasi-continuous sound associates temperature and water vapor structure in an

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Furnace control apparatus using polarizing interferometer  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1995-01-01T23:59:59.000Z

82

Process control system using polarizing interferometer  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1994-01-01T23:59:59.000Z

83

ACCELERATION OF RADIANCE FOR LIGHTING SIMULATION BY USING PARALLEL COMPUTING WITH OPENCL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ACCELERATION OF RADIANCE FOR LIGHTING SIMULATION BY USING ACCELERATION OF RADIANCE FOR LIGHTING SIMULATION BY USING PARALLEL COMPUTING WITH OPENCL Wangda Zuo, Andrew McNeil, Michael Wetter, Eleanor Lee Building Technologies Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA ABSTRACT We report on the acceleration of annual daylighting simulations for fenestration systems in the Radiance ray-tracing program. The algorithm was optimized to reduce both the redundant data input/output operations and the floating-point operations. To further accelerate the simulation speed, the calculation for matrix multiplications was implemented using parallel computing on a graphics processing unit. We used OpenCL, which is a cross- platform parallel programming language. Numerical

84

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Interferometer Sounder for M-PACE* The Future AERI New Deployments, System Upgrades, and Rapid Sampling Operations* Bianco, L. Improved Humidity Profiling by Combination of...

85

Solar Energy, 2006, 80, 3, 361-367 SIMULATING METEOSAT-7 BROADBAND RADIANCES USING TWO  

E-Print Network [OSTI]

Solar Energy, 2006, 80, 3, 361-367 SIMULATING METEOSAT-7 BROADBAND RADIANCES USING TWO VISIBLE-00361360,version1-13Feb2009 Author manuscript, published in "Solar Energy 80, 3 (2006) 361-367" DOI : 10.1016/j.solener.2005.01.012 #12;Solar Energy, 2006, 80, 3, 361-367 · Imet-7 the maximum irradiance

Paris-Sud XI, Université de

86

Bioluminescence in a complex coastal environment: 1. Temporal dynamics of nighttime water-leaving radiance  

E-Print Network [OSTI]

in intensity and spectral quality of water-leaving radiance provide suitable ranges for assessing detection light, which often leads to brilliant displays in the wakes of ships, in breaking waves, or even around method (as opposed to active methods such as RADAR or LIDAR) of identifying hostile ships, submarines

Moline, Mark

87

Laser-Ranging Long Baseline Differential Atom Interferometers for Space  

E-Print Network [OSTI]

High sensitivity differential atom interferometers are promising for precision measurements in science frontiers in space, including gravity field mapping for Earth science studies and gravitational wave detection. We propose a new configuration of twin atom interferometers connected by a laser ranging interferometer (LRI-AI) to provide precise information of the displacements between the two AI reference mirrors and a means to phase-lock the two independent interferometer lasers over long distances, thereby further enhancing the feasibility of long baseline differential atom interferometers. We show that a properly implemented LRI-AI can achieve equivalent functionality to the conventional differential atom interferometer measurement system. LRI-AI isolates the laser requirements for atom interferometers and for optical phase readout between distant locations, thus enabling optimized allocation of available laser power within a limited physical size and resource budget. A unique aspect of LRI-AI also enables...

Chiow, Sheng-wey; Yu, Nan

2015-01-01T23:59:59.000Z

88

Development of a GPU-based high-performance radiative transfer model for the Infrared Atmospheric Sounding Interferometer (IASI)  

SciTech Connect (OSTI)

Satellite-observed radiance is a nonlinear functional of surface properties and atmospheric temperature and absorbing gas profiles as described by the radiative transfer equation (RTE). In the era of hyperspectral sounders with thousands of high-resolution channels, the computation of the radiative transfer model becomes more time-consuming. The radiative transfer model performance in operational numerical weather prediction systems still limits the number of channels we can use in hyperspectral sounders to only a few hundreds. To take the full advantage of such high-resolution infrared observations, a computationally efficient radiative transfer model is needed to facilitate satellite data assimilation. In recent years the programmable commodity graphics processing unit (GPU) has evolved into a highly parallel, multi-threaded, many-core processor with tremendous computational speed and very high memory bandwidth. The radiative transfer model is very suitable for the GPU implementation to take advantage of the hardware's efficiency and parallelism where radiances of many channels can be calculated in parallel in GPUs. In this paper, we develop a GPU-based high-performance radiative transfer model for the Infrared Atmospheric Sounding Interferometer (IASI) launched in 2006 onboard the first European meteorological polar-orbiting satellites, METOP-A. Each IASI spectrum has 8461 spectral channels. The IASI radiative transfer model consists of three modules. The first module for computing the regression predictors takes less than 0.004% of CPU time, while the second module for transmittance computation and the third module for radiance computation take approximately 92.5% and 7.5%, respectively. Our GPU-based IASI radiative transfer model is developed to run on a low-cost personal supercomputer with four GPUs with total 960 compute cores, delivering near 4 TFlops theoretical peak performance. By massively parallelizing the second and third modules, we reached 364x speedup for 1 GPU and 1455x speedup for all 4 GPUs, both with respect to the original CPU-based single-threaded Fortran code with the -O{sub 2} compiling optimization. The significant 1455x speedup using a computer with four GPUs means that the proposed GPU-based high-performance forward model is able to compute one day's amount of 1,296,000 IASI spectra within nearly 10 min, whereas the original single CPU-based version will impractically take more than 10 days. This model runs over 80% of the theoretical memory bandwidth with asynchronous data transfer. A novel CPU-GPU pipeline implementation of the IASI radiative transfer model is proposed. The GPU-based high-performance IASI radiative transfer model is suitable for the assimilation of the IASI radiance observations into the operational numerical weather forecast model.

Huang Bormin, E-mail: bormin@ssec.wisc.ed [Space Science and Engineering Center, University of Wisconsin, Madison (United States); Mielikainen, Jarno [Department of Computer Science, University of Eastern Finland, Kuopio (Finland); Oh, Hyunjong; Allen Huang, Hung-Lung [Space Science and Engineering Center, University of Wisconsin, Madison (United States)

2011-03-20T23:59:59.000Z

89

Phase-shifting point diffraction interferometer  

DOE Patents [OSTI]

Disclosed is a point diffraction interferometer for evaluating the quality of a test optic. In operation, the point diffraction interferometer includes a source of radiation, the test optic, a beam divider, a reference wave pinhole located at an image plane downstream from the test optic, and a detector for detecting an interference pattern produced between a reference wave emitted by the pinhole and a test wave emitted from the test optic. The beam divider produces separate reference and test beams which focus at different laterally separated positions on the image plane. The reference wave pinhole is placed at a region of high intensity (e.g., the focal point) for the reference beam. This allows reference wave to be produced at a relatively high intensity. Also, the beam divider may include elements for phase shifting one or both of the reference and test beams. 8 figs.

Medecki, H.

1998-11-10T23:59:59.000Z

90

Simultaneous measurements of super-radiance at multiple wavelengths from helium excited states: (I) Experiment  

E-Print Network [OSTI]

In this paper, we report the results of measurements of the intensities and delays of super-radiance decays from excited helium atoms at multiple wavelengths. The experiment was performed using extreme ultraviolet radiation produced by the free electron laser at the SPring-8 Compact SASE Source test accelerator facility as an excitation source. We observed super-radiant transitions on the $1s3p \\to 1s2s$ ($\\lambda=$502 nm), $1s3d \\to 1s2p$ ($\\lambda=$668 nm), and $1s3s \\to 1s2p$ ($\\lambda=$728 nm) transitions. The pulse energy of each transition and its delay time were measured as a function of the target helium gas density. Several interesting features of the data, some of which appear to contradict with the predictions of the simple two-level super-radiance theory, are pointed out.

Nakajima, Kyo; Iwayama, Hiroshi; Kuma, Susumu; Miyamoto, Yuki; Nagasono, Mitsuru; Ohae, Chiaki; Togashi, Tadashi; Yabashi, Makina; Shigemasa, Eiji; Sasao, Noboru

2014-01-01T23:59:59.000Z

91

Advanced lightning location interferometer. Final report  

SciTech Connect (OSTI)

In January, 1994, New Mexico Institute for Mining and Technology (NM Tech) was commissioned by Los Alamos National Laboratories (LANL) to develop a three-axis interferometric lightning mapping system to be used in determining the source of certain frequency-dispersed pulse pairs which had been detected by spaceborne sensors. The existing NM Tech VHF Lightning Interferometer was a two axis system operating at 274 MHz with 6 MHz bandwidth. The third axis was to be added to refine estimates of the elevation angle to distant RF sources in that band. The system was to be initially deployed in support of an Air Force Technical Applications Center (AFTAC) effort planned for the Kennedy Space Center/Cape Canaveral AFS area in June-July of 1994. The project was, however, postponed until September of 1994. The interferometer was set up and operated at KSC near the Lightning Detection and Ranging (LDAR) central station. The initial setup was in two-axis configuration, and the third (vertical) axis was added at about mid-project. Though the storms were reduced in frequency and severity over what one would expect in mid-summer, several good data sets were obtained and delivered to AFTAC.

NONE

1995-05-25T23:59:59.000Z

92

Dispersion interferometer using modulation amplitudes on LHD (invited)  

SciTech Connect (OSTI)

Since a dispersion interferometer is insensitive to mechanical vibrations, a vibration compensation system is not necessary. The CO{sub 2} laser dispersion interferometer with phase modulations on the Large Helical Device utilizes the new phase extraction method which uses modulation amplitudes and can improve a disadvantage of the original dispersion interferometer: measurement errors caused by variations of detected intensities. The phase variation within 2 10{sup 17} m{sup ?3} is obtained without vibration compensation system. The measured line averaged electron density with the dispersion interferometer shows good agreement with that with the existing far infrared laser interferometer. Fringe jump errors in high density ranging up to 1.5 10{sup 20} m{sup ?3} can be overcome by a sufficient sampling rate of about 100 kHz.

Akiyama, T., E-mail: takiyama@lhd.nifs.ac.jp; Yasuhara, R.; Kawahata, K. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki-shi, Gifu 509-5292 (Japan); Okajima, S.; Nakayama, K. [Chubu University, Matsumoto-cho, Kasugai-shi, Aichi 487-8501 (Japan)

2014-11-15T23:59:59.000Z

93

Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance  

SciTech Connect (OSTI)

We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.

Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew; Jonsson, Ph.D., Jacob

2011-01-21T23:59:59.000Z

94

Fourier-transform and global contrast interferometer alignment methods  

DOE Patents [OSTI]

Interferometric methods are presented to facilitate alignment of image-plane components within an interferometer and for the magnified viewing of interferometer masks in situ. Fourier-transforms are performed on intensity patterns that are detected with the interferometer and are used to calculate pseudo-images of the electric field in the image plane of the test optic where the critical alignment of various components is being performed. Fine alignment is aided by the introduction and optimization of a global contrast parameter that is easily calculated from the Fourier-transform.

Goldberg, Kenneth A. (Berkeley, CA)

2001-01-01T23:59:59.000Z

95

Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer  

SciTech Connect (OSTI)

Building designers are increasingly relying on complex fenestration systems to reduce energy consumed for lighting and HVAC in low energy buildings. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex fenestration systems. Depending on the configurations, the simulation can take hours or even days using a personal computer. This paper describes how to accelerate the matrix multiplication portion of a Radiance three-phase daylight simulation by conducting parallel computing on heterogeneous hardware of a personal computer. The algorithm was optimized and the computational part was implemented in parallel using OpenCL. The speed of new approach was evaluated using various daylighting simulation cases on a multicore central processing unit and a graphics processing unit. Based on the measurements and analysis of the time usage for the Radiance daylighting simulation, further speedups can be achieved by using fast I/O devices and storing the data in a binary format.

University of Miami; Zuo, Wangda; McNeil, Andrew; Wetter, Michael; Lee, Eleanor S.

2013-04-30T23:59:59.000Z

96

Release Path Temperatures of Shock-Compressed Tin from Dynamic Reflectance and Radiance Measurements  

SciTech Connect (OSTI)

Dynamic reflectance and radiance measurements were conducted for tin samples shock compressed to 35 GPa and released to 15 GPa using high explosives. We determined the reflectance of the tin samples glued to lithium fluoride windows using an integrating sphere with an internal xenon flashlamp as an illumination source. The dynamic reflectance (R) was determined at near normal incidence in four spectral bands with coverage in visible and near-infrared spectra. Uncertainties in R/R0 are < 2%, and uncertainties in absolute reflectance are < 5%. In complementary experiments, thermal radiance from the tin/glue/lithium fluoride interface was recorded with similar shock stress and spectral coverage as the reflectance measurements. The two sets of experiments were combined to obtain the temperature history of the tin surface with an uncertainty of < 2%. The stress at the interface was determined from photonic Doppler velocimetry and combined with the temperatures to obtain temperature-stress release paths for tin. We discuss the relationship between the experimental release paths and release isentropes that begin on the principal shock Hugoniot.

La Lone, B. M. [NSTec; Stevens, G. D. [NSTec; Turley, W. D. [NSTec; Holtkamp, D. B. [LANL; Iverson, A. J. [NSTec; Hixson, R. S. [NSTec; Veeser, L. R. [NSTec

2013-08-01T23:59:59.000Z

97

REDSHIFTS, WIDTHS, AND RADIANCES OF SPECTRAL LINES EMITTED BY THE SOLAR TRANSITION REGION  

SciTech Connect (OSTI)

A long-standing problem in understanding the physics of the transition region has been the ubiquitous redshifts of transition region ultraviolet spectral lines relative to chromospheric emission lines, a result known since the Skylab era. Extended spectral scans performed for various regions of the solar disk by the Solar Ultraviolet Measurements of Emitted Radiation spectrometer on the Solar and Heliospheric Observatory contain thousands of line profiles per study and allow a thorough investigation of the redshift phenomenon. In using these data from seven distinct disk areas made in lines spanning the chromosphere to coronal temperature range, we derive a relationship between Doppler wavelength shifts and radiances and a relationship between line widths and radiances. While chromospheric and coronal lines emitted by very bright plasmas may in some cases show pronounced redshifts, transition-region lines predominantly show redshifts everywhere in the quiet Sun and in active regions. In coronal holes, however, they display a reduced shift, which at times altogether disappears. The observations and the findings will be described, and possible explanations will be considered.

Feldman, U. [Artep Inc. 2922 Excelsior Spring Circle, Ellicott City, Columbia, MD 21042 (United States); Dammasch, I. E. [Solar Influences Data Analysis Center, Royal Observatory of Belgium, Circular Avenue 3, 1180 Uccle, Brussels (Belgium); Doschek, G. A. [Space Science Division, Naval Research Laboratory, Washington, DC (United States)

2011-12-20T23:59:59.000Z

98

Microwave Interferometer Density Diagnostic for the Levitated Dipole Experiment  

E-Print Network [OSTI]

we call magnetohydrodynamics (MHD). In a plasma confined by a dipole magnetic field, MHD places. #12;Block Diagram of the Single-Channel LDX Interferometer Showing Power Gains and Losses #12;The LDX

99

Analog processing based vibration measurement technique using michelson interferometer  

Science Journals Connector (OSTI)

A Michelson interferometer based sensor, to monitor the displacement and vibration of a surface, is presented. The interference signals detected in quadrature are processed using analog electronics to find the...

Babar Hussain; Mushtaq Ahmed; Ghazanfar Hussain; Muhammad Saleem

2013-06-01T23:59:59.000Z

100

A comparison of cloud top heights computed from airborne lidar and MAS radiance data using CO2 slicing  

E-Print Network [OSTI]

A comparison of cloud top heights computed from airborne lidar and MAS radiance data using CO2 in assessing the accuracy of the CO2-slicing cloud height algorithm. Infrared measurements of upwelling which included various single- layer and multilayer cloud conditions. Overall, the CO2-slicing method

Sheridan, Jennifer

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Improved ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM-SGP TOA OLR Fluxes from GOES-8 IR ARM-SGP TOA OLR Fluxes from GOES-8 IR Radiances Based on CERES Data D. R. Doelling and M. M. Khaiyer Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis National Aeronautics and Space Administration Langley Research Center Hampton, Virginia Introduction The radiation budget at the top of the atmosphere (TOA) is a quantity of fundamental importance to the Atmospheric Radiation Measurement (ARM) Program. Thus, it is necessary to measure the radiation budget components, broadband shortwave albedo and outgoing longwave radiation (OLR), as accurately as possible. Measurement of OLR over the ARM surface sites has only been possible since the advent of Clouds and the Earth's Radiant Energy System (CERES; Wielicki et al. 1998) in 1998. Prior to

102

A nanoflare model for active region radiance: application of artificial neural networks  

E-Print Network [OSTI]

Context. Nanoflares are small impulsive bursts of energy that blend with and possibly make up much of the solar background emission. Determining their frequency and energy input is central to understanding the heating of the solar corona. One method is to extrapolate the energy frequency distribution of larger individually observed flares to lower energies. Only if the power law exponent is greater than 2, is it considered possible that nanoflares contribute significantly to the energy input. Aims. Time sequences of ultraviolet line radiances observed in the corona of an active region are modelled with the aim of determining the power law exponent of the nanoflare energy distribution. Methods. A simple nanoflare model based on three key parameters (the flare rate, the flare duration time, and the power law exponent of the flare energy frequency distribution) is used to simulate emission line radiances from the ions Fe XIX, Ca XIII, and Si iii, observed by SUMER in the corona of an active region as it rotates around the east limb of the Sun. Light curve pattern recognition by an Artificial Neural Network (ANN) scheme is used to determine the values. Results. The power law exponents, alpha 2.8, 2.8, and 2.6 for Fe XIX, Ca XIII, and Si iii respectively. Conclusions. The light curve simulations imply a power law exponent greater than the critical value of 2 for all ion species. This implies that if the energy of flare-like events is extrapolated to low energies, nanoflares could provide a significant contribution to the heating of active region coronae.

M. Bazarghan; H. Safari; D. E. Innes; E. Karami; S. K. Solanki

2008-08-28T23:59:59.000Z

103

Polarizing optical interferometer having a dual use optical element  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1995-01-01T23:59:59.000Z

104

Interpreting a nested Mach-Zehnder interferometer with classical optics  

E-Print Network [OSTI]

In an recent work with the title "Asking Photons Where They Have Been", Danan et al. experimentally demonstrate an intriguing behavior of photons in an interferometer [Phys. Rev. Lett. 111, 240402 (2013)]. In their words: "The photons tell us that they have been in the parts of the interferometer through which they could not pass." They interpret the results using the two-state vector formalism of quantum theory and say that, although an explanation of the experimental results in terms of classical electromagnetic waves in the interferometer is possible (and they provide a partial description), it is not so intuitive. Here we present a more detailed classical description of their experimental results, showing that it is actually intuitive. The same description is valid for the quantum wave function of the photons propagating in the interferometer. In particular, we show that it is essential that the wave propagates through all parts of the interferometer to describe the experimental results. We hope that our work helps to give a deeper understanding of these interesting experimental results.

Pablo L. Saldanha

2014-03-13T23:59:59.000Z

105

Probing angular momentum coherence in a twin-atom interferometer  

E-Print Network [OSTI]

We propose to use a double longitudinal Stern-Gerlach atom interferometer in order to investigate quantitatively the angular momentum coherence of molecular fragments. Assuming that the dissociated molecule has a null total angular momentum, we investigate the propagation of the corresponding atomic fragments in the apparatus. We show that the envisioned interferometer enables one to distinguish unambiguously a spin-coherent from a spin-incoherent dissociation, as well as to estimate the purity of the angular momentum density matrix associated with the fragments. This setup, which may be seen as an atomic analogue of a twin-photon interferometer, can be used to investigate the suitability of molecule dissociation processes -- such as the metastable hydrogen atoms H($2^2 S$)-H($2^2 S$) dissociation - for coherent twin-atom optics.

de Carvalho, Carlos R; Impens, Franois; Robert, J; Medina, Aline; Zappa, F; Faria, N V de Castro

2014-01-01T23:59:59.000Z

106

Design of a dual species atom interferometer for space  

E-Print Network [OSTI]

Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of a space compatible design optimized with respect to dimensions, weight, power consumption, mechanical robustness and radiation hardness. In this paper, we present a design of a high-sensitivity differential dual species $^{85}$Rb/$^{87}$Rb atom interferometer for space, including physics package, laser system, electronics and software. The physics package comprises the atom source consisting of dispensers and a 2D magneto-optical trap (MOT), the science chamber with a 3D-MOT, a magnetic trap based on an atom chip and an optical dipole trap (ODT) used for Bose-Einstein condensate (BEC) creation and interferometry...

Schuldt, Thilo; Krutzik, Markus; Bote, Lluis Gesa; Gaaloul, Naceur; Hartwig, Jonas; Ahlers, Holger; Herr, Waldemar; Posso-Trujillo, Katerine; Rudolph, Jan; Seidel, Stephan; Wendrich, Thijs; Ertmer, Wolfgang; Herrmann, Sven; Kubelka-Lange, Andr; Milke, Alexander; Rievers, Benny; Rocco, Emanuele; Hinton, Andrew; Bongs, Kai; Oswald, Markus; Franz, Matthias; Hauth, Matthias; Peters, Achim; Bawamia, Ahmad; Wicht, Andreas; Battelier, Baptiste; Bertoldi, Andrea; Bouyer, Philippe; Landragin, Arnaud; Massonnet, Didier; Lvque, Thomas; Wenzlawski, Andre; Hellmig, Ortwin; Windpassinger, Patrick; Sengstock, Klaus; von Klitzing, Wolf; Chaloner, Chris; Summers, David; Ireland, Philip; Mateos, Ignacio; Sopuerta, Carlos F; Sorrentino, Fiodor; Tino, Guglielmo M; Williams, Michael; Trenkel, Christian; Gerardi, Domenico; Chwalla, Michael; Burkhardt, Johannes; Johann, Ulrich; Heske, Astrid; Wille, Eric; Gehler, Martin; Cacciapuoti, Luigi; Grlebeck, Norman; Braxmaier, Claus; Rasel, Ernst

2014-01-01T23:59:59.000Z

107

LIGO interferometer operating at design sensitivity with application to gravitational radiometry  

E-Print Network [OSTI]

During the last decade the three interferometers of the Laser Interferometer Gravitational Wave Observatory (LIGO) were built and commissioned. In fall 2005 design sensitivity was achieved, corresponding to a strain ...

Ballmer, Stefan W. (Stefan Werner)

2006-01-01T23:59:59.000Z

108

A novel white-light scanning interferometer for absolute nano-scale gap thickness measurement  

E-Print Network [OSTI]

This paper presents a special configuration of white-light scanning interferometer, in which the measured gap is not located in any interference arm of the interferometer, but acts as an amplitude-and-phase modulator of ...

Xu, Zhiguang

109

A vibrationally compensated far infrared laser interferometer for plasma density measurements  

Science Journals Connector (OSTI)

A modulated far-infrared laser interferometer which is presently operating on the PDX experiment at Princeton is described. The interferometer geometry permits the characterization of inside D, outside D a...

D. K. Mansfield; L. C. Johnson

1980-12-01T23:59:59.000Z

110

Evaluating Water Vapor in the NCAR CAM3 Climate Model with RRTMG/McICA using Modeled and Observed AIRS Spectral Radiances  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Water Vapor in the NCAR CAM3 Climate Model with Water Vapor in the NCAR CAM3 Climate Model with RRTMG/McICA using Modeled and Observed AIRS Spectral Radiances Michael J. Iacono, Atmospheric and Environmental Research, Inc., 131 Hartwell Avenue, Lexington, MA 02421 USA 1. Overview Objectives: * Evaluate water vapor and temperature simulation in two versions of CAM3 by comparing modeled and observed cloud-cleared AIRS spectral radiances. * Use spectral differences to verify comparisons between modeled water vapor and temperature and observed fields retrieved from AIRS radiances. Models: OSS: Optimal Spectral Sampling model developed at AER was used to simulate clear sky AIRS radiance spectra in CAM3. RRTMG/McICA: ARM-supported LW and SW radiative transfer model developed at AER for application to GCMs. RRTMG has been fully

111

Satellite Data Assimilation in Numerical Weather Prediction Models. Part II: Uses of Rain-Affected Radiances from Microwave Observations for Hurricane Vortex Analysis  

Science Journals Connector (OSTI)

A hybrid variational scheme (HVAR) is developed to produce the vortex analysis associated with tropical storms. This scheme allows for direct assimilation of rain-affected radiances from satellite microwave instruments. In the HVAR, the ...

Fuzhong Weng; Tong Zhu; Banghua Yan

2007-11-01T23:59:59.000Z

112

Microwave Interferometer Density Diagnostic for the Levitated Dipole Experiment  

E-Print Network [OSTI]

as an electrically conducting gas subject to the laws of thermodynamics and electromagnetism (MHD). In a plasma confined by a dipole magnetic field, MHD places strict requirements on the pressure profile but does-shifts are measured in Quadrature from two IF signals. #12;Block Diagram of the LDX Interferometer Showing Power Gains

113

Comparative System Trades Between Structurally Connected and Separated Spacecraft Interferometers  

E-Print Network [OSTI]

) Massachusetts Institute of Technology Submitted to the Department of Aeronautics and Astronautics in partial at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY May 1998 © Massachusetts Institute of Technology, 1998. All Rights-based, infrared interferometer designed to directly detect extra-solar planets. TPF consists of four apertures

114

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Infrared Interferometric Measurements of the Air-Sea Temperature Difference Infrared Interferometric Measurements of the Air-Sea Temperature Difference Minnett, P.J., Rosenstiel School of Marine and Atmospheric Science, University of Miami Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting Marine Atmosphere Emitted Radiance Interferometers (M-AERI) have been mounted on several research ships on cruises in the world?s oceans, several in the areas of the ARM TWP and NSA-AAO sites. Accurate measurements of the skin sea-surface temperature and near-surface air temperatures are derived from the infrared spectral measurements, which, unlike conventional measurements of air-sea temperature difference, have a common calibration. This removes the largest source of uncertainty in the measurement of air-sea temperature differences, and thereby a major uncertainty in

115

ARM - Measurement - Atmospheric moisture  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

moisture moisture ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Atmospheric moisture The moisture content of the air as indicated by several measurements including relative humidity, specific humidity, dewpoint, vapor pressure, water vapor mixing ratio, and water vapor density; note that precipitable water is a separate type. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AERI : Atmospheric Emitted Radiance Interferometer

116

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Visualization of AERIPLUS Temperature and Visualization of AERIPLUS Temperature and Moisture Profiles for Assimilation into ARM Single-Column Models W. F. Feltz, R. O. Knuteson, H. B. Howell, B. Hibbard, T. Rink, and T. Whittaker Space Science and Engineering Center University of Wisconsin-Madison Madison, Wisconsin D. D. Turner Pacific Northwest National Laboratory Richland, Washington S. Xie and R. T. Cederwall Lawrence Livermore National Laboratory Livermore, California Introduction Using remotely sensed temperature, moisture, and wind data to initialize and drive Single-Column Models (SCM) is an important goal of the Atmospheric Radiation Measurement (ARM) Program. Since December 1998, five atmospheric emitted radiance interferometer (AERI) (Revercomb et al. 1993) systems have been running nearly continuously at the central and boundary facilities at the Southern

117

Section 56  

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0.5° 0.5° C 0° C Session Papers 237 Enhancement of Atmospheric Radiation Measurement Surface Meteorological Observations During the Fall 1996 Water Vapor Intensive Observation Period S. J. Richardson and M. E. Splitt Cooperative Institute for Mesoscale Meteorological Studies University of Oklahoma Norman, Oklahoma Abstract This work describes in situ moisture sensor comparisons performed in conjunction with the first Water Vapor (WV) Intensive Observation Period (IOP) conducted at the Atmos- pheric Radiation Measurement (ARM) Program Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site during September of 1996. Numerous remote sensing instruments (e.g., two Raman Lidar, two Atmospheric Emitted Radiance Interferometers [AERI], and a suite of 13 microwave radiometers) were assembled at the CART site

118

brown-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

High Resolution Validation in the Shortwave: High Resolution Validation in the Shortwave: ASTI/LBLRTM QME P. D. Brown, S. A. Clough, and E. J. Mlawer Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts T. R. Shippert Pacific Northwest National Laboratory Richland, Washington F. J. Murcray Denver University Denver, Colorado Introduction To assess our modeling capability in the shortwave and to resolve issues including those described by Cess et al. (1995) and others (Li and Moreau 1996; Arking 1996), a Quality Measurement Experiment (QME) has been initiated that extends the approach of the longwave AERI/LBLRTM (atmospheric emitted radiance interferometer/line by line radiative transfer model) QME (Brown et al. 1998) to shorter wavelengths. This shortwave QME for the clear sky focuses upon three components: 1) the ability to accurately

119

ARM - Measurement - Atmospheric temperature  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

temperature temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Atmospheric temperature The temperature indicated by a thermometer exposed to the air in a place sheltered from direct solar radiation. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AERI : Atmospheric Emitted Radiance Interferometer SONDE : Balloon-Borne Sounding System CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System

120

ARM - Site Instruments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FacilitiesAMF Deployment, Ganges Valley, FacilitiesAMF Deployment, Ganges Valley, IndiaInstruments Ganges Valley Deployment AMF Home Ganges Valley Home Data Plots and Baseline Instruments Campaign Images WRF Model Simulations for GVAX Experiment Planning GVAX Full Proposal Abstract and Related Campaigns Science Plan Outreach GVAX Backgrounder (PDF, 1.4MB) News Education Flyer (PDF, 2.1MB) AMF Poster, 2011 Images Contacts V. Rao Kotamarthi Instruments : Ganges Valley, India [ Single installation ] AERI Atmospheric Emitted Radiance Interferometer Radiometric Browse Plots Browse Data [ Single installation ] AOS Aerosol Observing System Aerosols Browse Data [ Single installation ] CCN Cloud Condensation Nuclei Particle Counter Aerosols Browse Data [ Single installation ] CLAP Continuous Light Absorption Photometer Aerosols Browse Data

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121

ARM - Publications: Science Team Meeting Documents: Measurements of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Measurements of atmospheric water vapor over the oceans Measurements of atmospheric water vapor over the oceans Szczodrak, Malgorzata University of Miami Minnett, Peter University of Miami Feltz, Wayne University of Wisconsin Atmospheric water vapor is an important part of the Earth's hydrological cycle and plays a crucial role in many aspects of the climate system. The main source of the atmospheric moisture are the oceans, but the information we have about the distribution of atmospheric water vapor over the oceans is based on a relatively sparse distribution of radiosonde profiles, or on satellite-based measurements from microwave radiometers. The Marine-Atmosphere Emitted Radiance Interferometer (M-AERI) is a sea-going instrument that measures spectra of atmospheric infrared emission with ~10 minute temporal resolution. These spectra can be used to retrieve profiles

122

Section 111  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

W/m W/m 2 Session Papers 499 The Status of Quality Measurement Experiments in the Microwave, Longwave, and Shortwave P. D. Brown and S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts D. D. Turner and T. R. Shippert Pacific Northwest National Laboratory Richland, Washington R. O. Knuteson, H. E. Revercomb and W. L. Smith University of Wisconsin Madison, Wisconsin Introduction Spectral analyses from the Atmospheric Emitted Radiance Interferometer/Line-by-Line Radiative Transfer Model (AERI/LBLRTM) Quality Measurement Experiment (QME) have proven critical in the assessment of clear sky radiative transfer modeling capability for general circulation models (GCMs). The QME provides a mechanism for the assessment of the three critical components of the longwave spectral

123

* The far-infrared (λ > 15 µm) is an important  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

infrared (λ > 15 µm) is an important infrared (λ > 15 µm) is an important component of the overall radiation budget of the Earth, accounting for approximately half of the outgoing infrared radiation to space. * Dominated by the pure rotation band of water vapor, the maximum mid-to-upper tropospheric cooling also occurs in the far-IR (left panel). * ARM science team research has resulted in enormous improvements in the treatment of radiation in climate models (e.g. Tobin et al. 1999; right panel). Tropical atmosphere cooling rates calculated using modern LBLRTM calculations(left panel) and differences between current and early ARM (1995/1996) calculations. At the conclusion of the 1997 SHEBA campaign, some spectral differences between Atmospheric Emitted Radiance Interferometer (AERI) measurements and

124

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sensitivity of Convective Indices to Humidity Adjustments Sensitivity of Convective Indices to Humidity Adjustments M. E. Splitt University of Utah Salt Lake City, Utah R. A. Peppler Cooperative Institute for Mesoscale Meteorological Studies University of Oklahoma Norman, Oklahoma K. M. Kuhlman University of North Carolina Asheville, North Carolina Introduction Modification of Atmospheric Radiation Measurement (ARM) Program Balloon-borne Sounding System (BBSS) data streams has been conducted as part of instantaneous radiative Flux (IRF) Working Group efforts to improve the comparison between Atmospheric Emitted Radiance Interferometer (AERI) spectral infrared radiation measurements and line-by-line radiative transfer model estimates (Turner et al. 1998). The focus for the modification of BBSS data has been on its humidity measurements. The

125

A Fiber Interferometer for the Magnetized Shock Experiment  

SciTech Connect (OSTI)

The Magnetized Shock Experiment (MSX) at Los Alamos National Laboratory requires remote diagnostics of plasma density. Laser interferometry can be used to determine the line-integrated density of the plasma. A multi-chord heterodyne fiber optic Mach-Zehnder interferometer is being assembled and integrated into the experiment. The advantage of the fiber coupling is that many different view chords can be easily obtained by simply moving transmit and receive fiber couplers. Several such fiber sets will be implemented to provide a time history of line-averaged density for several chords at once. The multiple chord data can then be Abel inverted to provide radially resolved spatial profiles of density. We describe the design and execution of this multiple fiber interferometer.

Yoo, Christian [Los Alamos National Laboratory

2012-08-30T23:59:59.000Z

126

Heterodyne interferometer with angstrom-level periodic nonlinearity  

DOE Patents [OSTI]

Displacement measuring interferometer systems and methods are disclosed. One or more acousto-optic modulators for receiving a laser light beam from a laser light source can be utilized to split the laser light beam into two or more laser light beams, while spatially separating frequencies thereof. One or more reflective mechanisms can be utilized to reflect one or more of the laser light beams back to the acousto-optic modulator. Interference of two or more of the laser light beams generally at the acousto-optic modulator can provide an interfered laser light beam thereof. A detector for receiving the interfered laser light beam can be utilized to provide interferometer measurement data.

Schmitz, Tony L. (Gainesville, FL); Beckwith, John F. (Indialantic, FL)

2005-01-25T23:59:59.000Z

127

Optical analysis and alignment applications using the infrared Smartt interferometer  

SciTech Connect (OSTI)

The possibility of using the infrared Smartt interferometer for optical analysis and alignment of infrared laser systems has been discussed previously. In this paper, optical analysis of the Gigawatt Test Facility at Los Alamos, as well as a deformable mirror manufactured by Rocketdyne, are discussed as examples of the technique. The possibility of optically characterizing, as well as aligning, pulsed high energy laser systems like Helios and Antares is discussed in some detail.

Viswanathan, V.K.; Bolen, P.D.; Liberman, I.; Seery, B.D.

1981-01-01T23:59:59.000Z

128

Michelson interferometer null may confirm transverse Doppler Effect  

E-Print Network [OSTI]

We analyze fringe formation within Michelson-like experiments as viewed by relativistic inertial observers. Our analysis differs from previous work because we include optical misalignment of the beamsplitter of the interferometer due to the anamorphic geometry of relativistic Lorentz contraction. We conclude that inertial frame equivalence of Michelson-like experiments provide verification of the transverse Doppler Effect and exclude any model incorporating the relativistic Lorentz contraction effect.

Woodruff, Robert A

2014-01-01T23:59:59.000Z

129

Demonstration of improved sensitivity of echo interferometers to gravitational acceleration  

E-Print Network [OSTI]

We have developed two configurations of an echo interferometer that rely on standing wave excitation of a laser-cooled sample of rubidium atoms that measures acceleration. For a two-pulse configuration, the interferometer signal is modulated at the recoil frequency and exhibits a sinusoidal frequency chirp as a function of pulse spacing. For a three-pulse stimulated echo configuration, the signal is observed without recoil modulation and exhibits a modulation at a single frequency. The three-pulse configuration is less sensitive to effects of vibrations and magnetic field curvature leading to a longer experimental timescale. For both configurations of the atom interferometer (AI), we show that a measurement of acceleration with a statistical precision of 0.5% can be realized by analyzing the shape of the echo envelope that has a temporal duration of a few microseconds. Using the two-pulse AI, we obtain measurements of acceleration that are statistically precise to 6 parts per million (ppm) on a 25 ms timescal...

Mok, C; Carew, A; Berthiaume, R; Beattie, S; Kumarakrishnan, A

2013-01-01T23:59:59.000Z

130

Raman lidar profiling of water vapor and aerosols over the ARM SGP Site  

SciTech Connect (OSTI)

The authors have developed and implemented automated algorithms to retrieve profiles of water vapor mixing ratio, aerosol backscattering, and aerosol extinction from Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) Raman Lidar data acquired during both daytime and nighttime operations. The Raman lidar sytem is unique in that it is turnkey, automated system designed for unattended, around-the-clock profiling of water vapor and aerosols. These Raman lidar profiles are important for determining the clear-sky radiative flux, as well as for validating the retrieval algorithms associated with satellite sensors. Accurate, high spatial and temporal resolution profiles of water vapor are also required for assimilation into mesoscale models to improve weather forecasts. The authors have also developed and implemented routines to simultaneously retrieve profiles of relative humidity. These routines utilize the water vapor mixing ratio profiles derived from the Raman lidar measurements together with temperature profiles derived from a physical retrieval algorithm that uses data from a collocated Atmospheric Emitted Radiance Interferometer (AERI) and the Geostationary Operational Environmental Satellite (GOES). These aerosol and water vapor profiles (Raman lidar) and temperature profiles (AERI+GOES) have been combined into a single product that takes advantage of both active and passive remote sensors to characterize the clear sky atmospheric state above the CART site.

Ferrare, R.A.

2000-01-09T23:59:59.000Z

131

RAMAN LIDAR PROFILING OF WATER VAPOR AND AEROSOLS OVER THE ARM SGP SITE.  

SciTech Connect (OSTI)

We have developed and implemented automated algorithms to retrieve profiles of water vapor mixing ratio, aerosol backscattering, and aerosol extinction from Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) Raman Lidar data acquired during both daytime and nighttime operations. This Raman lidar system is unique in that it is turnkey, automated system designed for unattended, around-the-clock profiling of water vapor and aerosols (Goldsmith et al., 1998). These Raman lidar profiles are important for determining the clear-sky radiative flux, as well as for validating the retrieval algorithms associated with satellite sensors. Accurate, high spatial and temporal resolution profiles of water vapor are also required for assimilation into mesoscale models to improve weather forecasts. We have also developed and implemented routines to simultaneously retrieve profiles of relative humidity. These routines utilize the water vapor mixing ratio profiles derived from the Raman lidar measurements together with temperature profiles derived from a physical retrieval algorithm that uses data from a collocated Atmospheric Emitted Radiance Interferometer (AERI) and the Geostationary Operational Environmental Satellite (GOES) (Feltz et al., 1998; Turner et al., 1999). These aerosol and water vapor profiles (Raman lidar) and temperature profiles (AERI+GOES) have been combined into a single product that takes advantage of both active and passive remote sensors to characterize the clear sky atmospheric state above the CART site.

FERRARE,R.A.

2000-01-09T23:59:59.000Z

132

Graphene based surface plasmonics in microfiber multimode interferometer for gas sensing  

Science Journals Connector (OSTI)

Graphene based surface plasmonics in microfiber multimode interferometer is proposed for realization of sub ppm sensitive, temperature independent, and compact fiber-optic gas sensor.

Yao, Baicheng; Wu, Yu; Zhang, Anqi; Rao, Yun-Jiang; Wang, Zegao; Cheng, Yang; Gong, Yuan; Zhang, Weili; Chen, Yuanfu; Chiang, K S

133

Stabilized dual-wavelength fiber-optic interferometer for vibration measurement  

Science Journals Connector (OSTI)

A stabilized fiber-optic interferometer was developed for vibration measurement by using two laser diodes of different wavelengths and one polarization-maintaining fiber. Passive...

Wright, O B

1991-01-01T23:59:59.000Z

134

The Magdalena Ridge Observatory interferometer: 2014 status update  

E-Print Network [OSTI]

the full complement of 10 telescope beams of the MROI. The design enables ICoNN to detect and track the interferometer fringe phase at either the H or Ks infrared bandpasses for any distribution of neighboring telescopes. It is a dedicated fringe... -mechanical stability even when tested in a university laboratory environment with no temperature or vibration control. Previous proceedings (Jurgenson et al. 2008 and McCracken et al. 2012, Santoro et al. 2012) have detailed the design and plans for laboratory...

Creech-Eakman, M. J.; Romero, V.; Payne, I.; Haniff, C. A.; Buscher, D. F.; Dahl, C.; Farris, A.; Fisher, M.; Jurgenson, C.; Klinglesmith, D.; McCracken, T.; Napolitano, M.; Olivares, A.; Riker, J.; Rochelle, S.; Salcido, C.; Santoro, F.; Schmidt, L.; Selina, R.; Seneta, E. B.; Shtromberg, A.; Sun, X.; Wilson, D. M. A.; Young, J. S.

2014-07-24T23:59:59.000Z

135

Hand held phase-shifting diffraction moire interferometer  

DOE Patents [OSTI]

An interferometer in which a coherent beam of light is generated within a remote case and transmitted to a hand held unit tethered to said remote case, said hand held unit having optical elements for directing a pair of mutually coherent collimated laser beams at a diffraction grating. Data from the secondary or diffracted beams are then transmitted to a separate video and data acquisition system for recording and analysis for load induced deformation or for identification purposes. Means are also provided for shifting the phase of one incident beam relative to the other incident beam and being controlled from within said remote case.

Deason, Vance A. (Idaho Falls, ID); Ward, Michael B. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

136

Generalized Formalisms of the Radio Interferometer Measurement Equation  

E-Print Network [OSTI]

The Radio Interferometer Measurement Equation (RIME) is a matrix-based mathematical model that describes the response of a radio interferometer. The Jones calculus it employs is not suitable for describing the analogue components of a telescope. This is because it does not consider the effect of impedance mismatches between components. This paper aims to highlight the limitations of Jones calculus, and suggests some alternative methods that are more applicable. We reformulate the RIME with a different basis that includes magnetic and mixed coherency statistics. We present a microwave network inspired 2N-port version of the RIME, and a tensor formalism based upon the electromagnetic tensor from special relativity. We elucidate the limitations of the Jones-matrix-based RIME for describing analogue components. We show how measured scattering parameters of analogue components can be used in a 2N-port version of the RIME. In addition, we show how motion at relativistic speed affects the observed flux. We present r...

Price, Danny C

2015-01-01T23:59:59.000Z

137

Measurements of Martin-Puplett Interferometer Limitations using Blackbody Source  

SciTech Connect (OSTI)

Frequency domain measurements with Martin-Puplett interferometer is one of a few techniques capable of bunch length measurements at the level of ~ 100 fs. As the bunch length becomes shorter, it is important to know and be able to measure the limitations of the instrument in terms of shortest measurable bunch length. In this paper we describe an experiment using a blackbody source with the modified Martin-Puplett interferometer that is routine- ly used for bunch length measurements at the JLab FEL, as a way to estimate the shortest, measurable bunch length. The limitation comes from high frequency cut-off of the wire-grid polarizer currently used and is estimated to be 50 fs RMS. The measurements are made with the same Golay cell detector that is used for beam measure- ments. We demonstrate that, even though the blackbody source is many orders of magnitude less bright than the coherent transition or synchrotron radiation, it can be used for the measurements and gives a very good signal to noise ratio in combination with lock-in detection. We also compare the measurements made in air and in vacuum to characterize the very strong effect of the atmospheric absorption.

Evtushenko, Pavel E. [JLAB; Klopf, John M. [JLAB

2013-06-01T23:59:59.000Z

138

Solar radius determination from SODISM/PICARD and HMI/SDO observations of the decrease of the spectral solar radiance during the June  

E-Print Network [OSTI]

Solar radius determination from SODISM/PICARD and HMI/SDO observations of the decrease of the spectral solar radiance during the June 2012 Venus transit A. Hauchecorne1 , M. Meftah1 , A. Irbah1 , S of Venus provided a rare opportunity to determine the radius of the Sun using solar imagers observing

Paris-Sud XI, Université de

139

Direct Insertion of MODIS Radiances in a Global Aerosol Transport Model CLARK WEAVER,* ARLINDO DA SILVA, MIAN CHIN,# PAUL GINOUX,@ OLEG DUBOVIK,&,@@  

E-Print Network [OSTI]

is directly inserted into the Goddard Chemistry and Aerosol Radiation Transport model (GOCART), which aerosol radiative forcing in the thermody- namic equation of GCMs, 3) to account for the reduc- tionDirect Insertion of MODIS Radiances in a Global Aerosol Transport Model CLARK WEAVER,* ARLINDO DA

Chin, Mian

140

Analyzing Black Hole super-radiance Emission of Particles/Energy from a Black Hole as a Gedankenexperiment to get bounds on the mass of a Graviton  

E-Print Network [OSTI]

Use of super-radiance in BH physics, so dE/dt alternatives with the possibility of needing a multiverse containment of BH structure, or embracing what Hawkings wrote up recently, namely a re do of the Event Horizon hypothesis as we know it.

Andrew Beckwith

2014-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Remotely Controlled, Continuous Observations of Infrared Radiance with the CSIRO/ARM Mark II Radiometer at the SGP CART Site  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Remotely Controlled, Continuous Observations of Remotely Controlled, Continuous Observations of Infrared Radiance with the CSIRO/ARM Mark II Radiometer at the SGP CART Site C. M. R. Platt and R. T. Austin Department of Atmospheric Science Colorado State University Fort Collins, Colorado C. M. R. Platt and J. A. Bennett Commonwealth Scientific and Industrial Research Organization Atmospheric Research Aspendale, Victoria, Australia Abstract The Commonwealth Scientific and Industrial Research Organization/Atmospheric Radiation Measurement (CSIRO/ARM) Program Mark II infrared (IR) filter radiometer operated continuously at the Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site for a period of five weeks. Data of high quality were obtained by remote operation and data transfer with no evidence of spurious

142

Microwave interferometer using 94-GHz solid-state sources  

SciTech Connect (OSTI)

A 94-GHz microwave interferometer has been designed for the Tandem Mirror Experiment Upgrade and the Mirror Fusion Test Facility to replace the 140-GHz system. The new system is smaller and has modular single-channel units designed for high reliability. It is magnetically shielded and can be mounted close to the machine, which allows the use of lower power solid-state sources. Test results of the 94-GHz prototype indicate that the phase resolution is better than 1/sup 0/, the Impatt FM noise is 5 MHz wide, and the Gunn FM noise is 6 kHz wide. This paper presents the antenna designs along with the test results and discusses the unique problems associated with diagnosing a high electron temperature plasma in the presence of electron cyclotron resonant heating.

Coffield, F.E.; Thomas, S.R.; Lang, D.D.; Stever, R.D.

1983-11-14T23:59:59.000Z

143

LIGO: the Laser Interferometer Gravitational-Wave Observatory  

Science Journals Connector (OSTI)

The goal of the Laser Interferometric Gravitational-Wave Observatory (LIGO) is to detect and study gravitational waves (GWs) of astrophysical origin. Direct detection of GWs holds the promise of testing general relativity in the strong-field regime, of providing a new probe of exotic objects such as black holes and neutron stars and of uncovering unanticipated new astrophysics. LIGO, a joint CaltechMIT project supported by the National Science Foundation, operates three multi-kilometer interferometers at two widely separated sites in the United States. These detectors are the result of decades of worldwide technology development, design, construction and commissioning. They are now operating at their design sensitivity, and are sensitive to gravitational wave strains smaller than one part in 1021. With this unprecedented sensitivity, the data are being analyzed to detect or place limits on GWs from a variety of potential astrophysical sources.

B P Abbott; R Abbott; R Adhikari; P Ajith; B Allen; G Allen; R S Amin; S B Anderson; W G Anderson; M A Arain; M Araya; H Armandula; P Armor; Y Aso; S Aston; P Aufmuth; C Aulbert; S Babak; P Baker; S Ballmer; C Barker; D Barker; B Barr; P Barriga; L Barsotti; M A Barton; I Bartos; R Bassiri; M Bastarrika; B Behnke; M Benacquista; J Betzwieser; P T Beyersdorf; I A Bilenko; G Billingsley; R Biswas; E Black; J K Blackburn; L Blackburn; D Blair; B Bland; T P Bodiya; L Bogue; R Bork; V Boschi; S Bose; P R Brady; V B Braginsky; J E Brau; D O Bridges; M Brinkmann; A F Brooks; D A Brown; A Brummit; G Brunet; A Bullington; A Buonanno; O Burmeister; R L Byer; L Cadonati; J B Camp; J Cannizzo; K C Cannon; J Cao; L Cardenas; S Caride; G Castaldi; S Caudill; M Cavagli; C Cepeda; T Chalermsongsak; E Chalkley; P Charlton; S Chatterji; S Chelkowski; Y Chen; N Christensen; C T Y Chung; D Clark; J Clark; J H Clayton; T Cokelaer; C N Colacino; R Conte; D Cook; T R C Corbitt; N Cornish; D Coward; D C Coyne; J D E Creighton; T D Creighton; A M Cruise; R M Culter; A Cumming; L Cunningham; S L Danilishin; K Danzmann; B Daudert; G Davies; E J Daw; D DeBra; J Degallaix; V Dergachev; S Desai; R DeSalvo; S Dhurandhar; M Daz; A Dietz; F Donovan; K L Dooley; E E Doomes; R W P Drever; J Dueck; I Duke; J-C Dumas; J G Dwyer; C Echols; M Edgar; A Effler; P Ehrens; E Espinoza; T Etzel; M Evans; T Evans; S Fairhurst; Y Faltas; Y Fan; D Fazi; H Fehrmenn; L S Finn; K Flasch; S Foley; C Forrest; N Fotopoulos; A Franzen; M Frede; M Frei; Z Frei; A Freise; R Frey; T Fricke; P Fritschel; V V Frolov; M Fyffe; V Galdi; J A Garofoli; I Gholami; J A Giaime; S Giampanis; K D Giardina; K Goda; E Goetz; L M Goggin; G Gonzlez; M L Gorodetsky; S Goler; R Gouaty; A Grant; S Gras; C Gray; M Gray; R J S Greenhalgh; A M Gretarsson; F Grimaldi; R Grosso; H Grote; S Grunewald; M Guenther; E K Gustafson; R Gustafson; B Hage; J M Hallam; D Hammer; G D Hammond; C Hanna; J Hanson; J Harms; G M Harry; I W Harry; E D Harstad; K Haughian; K Hayama; J Heefner; I S Heng; A Heptonstall; M Hewitson; S Hild; E Hirose; D Hoak; K A Hodge; K Holt; D J Hosken; J Hough; D Hoyland; B Hughey; S H Huttner; D R Ingram; T Isogai; M Ito; A Ivanov; B Johnson; W W Johnson; D I Jones; G Jones; R Jones; L Ju; P Kalmus; V Kalogera; S Kandhasamy; J Kanner; D Kasprzyk; E Katsavounidis; K Kawabe; S Kawamura; F Kawazoe; W Kells; D G Keppel; A Khalaidovski; F Y Khalili; R Khan; E Khazanov; P King; J S Kissel; S Klimenko; K Kokeyama; V Kondrashov; R Kopparapu; S Koranda; D Kozak; B Krishnan; R Kumar; P Kwee; P K Lam; M Landry; B Lantz; A Lazzarini; H Lei; M Lei; N Leindecker; I Leonor; C Li; H Lin; P E Lindquist; T B Littenberg; N A Lockerbie; D Lodhia; M Longo; M Lormand; P Lu; M Lubinski; A Lucianetti; H Lck; B Machenschalk; M MacInnis; M Mageswaran; K Mailand; I Mandel; V Mandic; S Mrka; Z Mrka; A Markosyan; J Markowitz; E Maros; I W Martin; R M Martin; J N Marx; K Mason; F Matichard; L Matone; R A Matzner; N Mavalvala; R McCarthy; D E McClelland; S C McGuire; M McHugh; G McIntyre; D J A McKechan; K McKenzie; M Mehmet; A Melatos; A C Melissinos; D F Menndez; G Mendell; R A Mercer; S Meshkov; C Messenger; M S Meyer; J Miller; J Minelli; Y Mino; V P Mitrofanov; G Mitselmakher; R Mittleman; O Miyakawa; B Moe; S D Mohanty; S R P Mohapatra; G Moreno; T Morioka; K Mors; K Mossavi; C MowLowry; G Mueller; H Mller-Ebhardt; D Muhammad; S Mukherjee; H Mukhopadhyay; A Mullavey; J Munch; P G Murray; E Myers; J Myers; T Nash; J Nelson; G Newton; A Nishizawa; K Numata; J O'Dell; B O'Reilly; R O'Shaughnessy; E Ochsner; G H Ogin; D J Ottaway; R S Ottens; H Overmier; B J Owen; Y Pan; C Pankow; M A Papa; V Parameshwaraiah; P Patel; M Pedraza; S Penn; A Perraca; V Pierro; I M Pinto; M Pitkin; H J Pletsch; M V Plissi; F Postiglione; M Principe; R Prix; L Prokhorov; O Punken; V Quetschke; F J Raab; D S Rabeling; H Radkins; P Raffai; Z Raics; N Rainer; M Rakhmanov; V Raymond; C M Reed; T Reed; H Rehbein; S Reid; D H Reitze; R Riesen; K Riles; B Rivera; P Roberts; N A Robertson; C Robinson; E L Robinson; S Roddy; C Rver; J Rollins; J D Romano; J H Romie; S Rowan; A Rdiger; P Russell; K Ryan; S Sakata; L Sancho de la Jordana; V Sandberg; V Sannibale; L Santamara; S Saraf; P Sarin; B S Sathyaprakash; S Sato; M Satterthwaite; P R Saulson; R Savage; P Savov; M Scanlan; R Schilling; R Schnabel; R Schofield; B Schulz; B F Schutz; P Schwinberg; J Scott; S M Scott; A C Searle; B Sears; F Seifert; D Sellers; A S Sengupta; A Sergeev; B Shapiro; P Shawhan; D H Shoemaker; A Sibley; X Siemens; D Sigg; S Sinha; A M Sintes; B J J Slagmolen; J Slutsky; J R Smith; M R Smith; N D Smith; K Somiya; B Sorazu; A Stein; L C Stein; S Steplewski; A Stochino; R Stone; K A Strain; S Strigin; A Stroeer; A L Stuver; T Z Summerscales; K-X Sun; M Sung; P J Sutton; G P Szokoly; D Talukder; L Tang; D B Tanner; S P Tarabrin; J R Taylor; R Taylor; J Thacker; K A Thorne; A Thring; K V Tokmakov; C Torres

2009-01-01T23:59:59.000Z

144

A Multi-Path Interferometer on an Atom Chip  

E-Print Network [OSTI]

Cold-atom interferometry is a powerful tool for high-precision measurements of the quantum properties of atoms, many-body interactions and gravity. Further enhancement of sensitivity and reduction of complexity of these devices are crucial conditions for success of their applications. Here we introduce a multi-path interferometric scheme that offers advances in both these aspects. It uses coherent coupling between Bose-Einstein condensates in different Zeeman states to generate an interferometric signal with sharp fringes. We realise such an interferometer as a compact easy-to-use atom-chip device and thus provide an alternative method for measurement of the light-atom and surface-atom interactions.

Jovana Petrovic; Ivan Herrera; Pietro Lombardi; Francesco S. Cataliotti

2011-11-18T23:59:59.000Z

145

A Multi-Path Interferometer on an Atom Chip  

E-Print Network [OSTI]

Cold-atom interferometry is a powerful tool for high-precision measurements of the quantum properties of atoms, many-body interactions and gravity. Further enhancement of sensitivity and reduction of complexity of these devices are crucial conditions for success of their applications. Here we introduce a multi-path interferometric scheme that offers advances in both these aspects. It uses coherent coupling between Bose-Einstein condensates in different Zeeman states to generate an interferometric signal with sharp fringes. We realise such an interferometer as a compact easy-to-use atom-chip device and thus provide an alternative method for measurement of the light-atom and surface-atom interactions.

Petrovic, Jovana; Lombardi, Pietro; Cataliotti, Francesco S

2011-01-01T23:59:59.000Z

146

Microwave interferometer for plasma-density measurement on TMX Upgrade  

SciTech Connect (OSTI)

A four-channel microwave interferometer operating at 140 GHz has been designed for installation on the upgrade to the Tandem Mirror Experiment (TMX Upgrade). The instrument can be used to measure plasma density simultaneously at four locations: by reconnecting the waveguide runs, density can be measured at other locations of interest. The design is an outgrowth of a system used on TMX, but includes some newly developed hardware. An over-mode circular waveguide system is used to transport the signals over long distances with only moderate losses. Several precautions have been taken to limit the effect of possible interference from the electron cyclotron resonant heating (ECRH) system used to heat the plasma. A high-resolution linear phase comparator has been designed that will operate over the wide range of signals expected. A CAMAC-based data-acquisition system provides for automatic data sampling and archival after each shot.

Coffield, F.E.; Stever, R.D.; Lund, N.P.

1981-09-25T23:59:59.000Z

147

Near-infrared wavefront sensing for the VLT interferometer  

E-Print Network [OSTI]

The very large telescope (VLT) interferometer (VLTI) in its current operating state is equipped with high-order adaptive optics (MACAO) working in the visible spectrum. A low-order near-infrared wavefront sensor (IRIS) is available to measure non-common path tilt aberrations downstream the high-order deformable mirror. For the next generation of VLTI instrumentation, in particular for the designated GRAVITY instrument, we have examined various designs of a four channel high-order near-infrared wavefront sensor. Particular objectives of our study were the specification of the near-infrared detector in combination with a standard wavefront sensing system. In this paper we present the preliminary design of a Shack-Hartmann wavefront sensor operating in the near-infrared wavelength range, which is capable of measuring the wavefronts of four telescopes simultaneously. We further present results of our design study, which aimed at providing a first instrumental concept for GRAVITY.

Stefan Hippler; Wolfgang Brandner; Yann Clnet; Felix Hormuth; Eric Gendron; Thomas Henning; Ralf Klein; Rainer Lenzen; Daniel Meschke; Vianak Naranjo; Udo Neumann; Jos Ricardo Ramos; Ralf-Rainer Rohloff; Frank Eisenhauer

2008-08-12T23:59:59.000Z

148

Prototyping method for Bragg-type atom interferometers  

SciTech Connect (OSTI)

We present a method for rapid modeling of new Bragg ultracold atom-interferometer (AI) designs useful for assessing the performance of such interferometers. The method simulates the overall effect on the condensate wave function in a given AI design using two separate elements. These are (1) modeling the effect of a Bragg pulse on the wave function and (2) approximating the evolution of the wave function during the intervals between the pulses. The actual sequence of these pulses and intervals is then followed to determine the approximate final wave function from which the interference pattern can be calculated. The exact evolution between pulses is assumed to be governed by the Gross-Pitaevskii (GP) equation whose solution is approximated using a Lagrangian variational method to facilitate rapid estimation of performance. The method presented here is an extension of an earlier one that was used to analyze the results of an experiment [J. E. Simsarian et al., Phys. Rev. Lett. 85, 2040 (2000)], where the phase of a Bose-Einstein condensate was measured using a Mach-Zehnder-type Bragg AI. We have developed both 1D and 3D versions of this method and we have determined their validity by comparing their predicted interference patterns with those obtained by numerical integration of the 1D GP equation and with the results of the above experiment. We find excellent agreement between the 1D interference patterns predicted by this method and those found by the GP equation. We show that we can reproduce all of the results of that experiment without recourse to an ad hoc velocity-kick correction needed by the earlier method, including some experimental results that the earlier model did not predict. We also found that this method provides estimates of 1D interference patterns at least four orders-of-magnitude faster than direct numerical solution of the 1D GP equation.

Benton, Brandon; Krygier, Michael; Heward, Jeffrey; Edwards, Mark [Department of Physics, Georgia Southern University, Statesboro, Georgia 30460-8031 (United States); Clark, Charles W. [Joint Quantum Insitute, National Institute of Standards and Technology and the University of Maryland, Gaithersburg, Maryland 20899 (United States)

2011-10-15T23:59:59.000Z

149

Vibration diagnosis and remediation design for an x-ray optics stitching interferometer system.  

SciTech Connect (OSTI)

The Advanced Photon Source (APS) x-ray optics Metrology Laboratory currently operates a small-aperture Wyko laser interferometer in a stitching configuration. While the stitching configuration allows for easier surface characterization of long x-ray substrates and mirrors, the addition of mechanical components for optic element translation can compromise the ultimate measurement performance of the interferometer. A program of experimental vibration measurements, quantifying the laboratory vibration environment and identifying interferometer support-system behavior, has been conducted. Insight gained from the ambient vibration assessment and modal analysis has guided the development of a remediation technique. Discussion of the problem diagnosis and possible solutions are presented in this paper.

Preissner, C.; Assoufid, L.; Shu, D.; Experimental Facilities Division (APS)

2004-01-01T23:59:59.000Z

150

Broadband squeezing of quantum noise in a Michelson interferometer with Twin-Signal-Recycling  

E-Print Network [OSTI]

Twin-Signal-Recycling (TSR) builds on the resonance doublet of two optically coupled cavities and efficiently enhances the sensitivity of an interferometer at a dedicated signal frequency. We report on the first experimental realization of a Twin-Signal-Recycling Michelson interferometer and also its broadband enhancement by squeezed light injection. The complete setup was stably locked and a broadband quantum noise reduction of the interferometers shot noise by a factor of up to 4\\,dB was demonstrated. The system was characterized by measuring its quantum noise spectra for several tunings of the TSR cavities. We found good agreement between the experimental results and numerical simulations.

Andr Thring; Christian Grf; Henning Vahlbruch; Moritz Mehmet; Karsten Danzmann; Roman Schnabel

2010-05-25T23:59:59.000Z

151

Multi-Channel FIR HCN Laser Interferometer on HT-7 Tokamak  

Science Journals Connector (OSTI)

A Five-channel far-infrared (FIR) hydrogen cyanide (HCN) laser interferometer was developed to measure plasma electron density profile on the HT-7 superconducting tokamak. The structure of the five-channel FIR .....

Y. X. Jie; X. Gao; Y. F. Cheng; K. Yang

2000-09-01T23:59:59.000Z

152

A cascaded photonic crystal fiber MachZehnder interferometer formed by extra electric arc discharges  

Science Journals Connector (OSTI)

In this paper, a cascaded MachZehnder interferometer based on a photonic crystal fiber is reported. It is demonstrated that by applying a small dose of extra arc discharge to the photonic crystal fiber sensin...

Y. Geng; X. Li; X. Tan; Y. Deng; Y. Yu

2011-03-01T23:59:59.000Z

153

Non-contact Micro Vibration Measurement System Based on Optical Fiber Michelson Interferometer  

Science Journals Connector (OSTI)

In this paper, an optical fiber Michelson interferometer is used to realize non-contact micro vibration measurement. The frequency response range of 1~1KHz and the displacement...

Xing, Chuanqi; Jing, Zhenguo; Peng, Wei

154

A ruggedized miniature UHV electron biprism interferometer for new fundamental experiments and applications  

Science Journals Connector (OSTI)

Electron interferometers are very sensitive to mechanical vibration and alternating magnetic fields. This is the reason why in the past their application was restricted to laboratories with very low disturbanc...

F. Hasselbach

1988-01-01T23:59:59.000Z

155

LCLS X-ray mirror measurements using a large aperture visible light interferometer  

SciTech Connect (OSTI)

Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior to installation to meet this intent. This paper describes how a 300 mm aperture phasing interferometer was calibrated to <1 nm absolute accuracy and used to mount and measure 450 mm long flats for the Linear Coherent Light Source (LCLS) at Stanford Linear Accelerator Center. Measuring focus mirrors with an interferometer requires additional calibration, because high fringe density introduces systematic errors from the interferometer's imaging optics. This paper describes how these errors can be measured and corrected. The calibration approaches described here apply equally well to interferometers larger than 300 mm aperture, which are becoming more common in optics laboratories. The objective of this effort was to install LCLS flats with < 10 nm of spherical curvature, and < 2 nm rms a-sphere. The objective was met by measuring the mirrors after fabrication, coating and mounting, using a 300 mm aperture phasing interferometer calibrated to an accuracy < 1 nm. The key to calibrating the interferometer accurately was to sample the error using independent geometries that are available. The results of those measurements helped identify and reduce calibration error sources. The approach used to measure flats applies equally well to focus mirrors, provided an additional calibration is performed to measure the error introduced by fringe density. This calibration has been performed on the 300 mm aperture interferometer, and the measurement correction was evaluated for a typical focus mirror. The 300 mm aperture limitation requires stitching figure measurements together for many X-ray mirrors of interest, introducing another possible error source. Stitching is eliminated by applying the calibrations described above to larger aperture instruments. The authors are presently extending this work to a 600 mm instrument. Instruments with 900 mm aperture are now becoming available, which would accommodate the largest mirrors of interest.

McCarville, T; Soufli, R; Pivovaroff, M

2011-03-02T23:59:59.000Z

156

Programmable multi-wavelength filter with MachZehnder interferometer embedded in ethanol filled photonic crystal fiber  

Science Journals Connector (OSTI)

We experimentally demonstrated a free spectrum range (FSR) tunable comb filter based on a programmable thermo-controlled MachZehnder interferometer. The device is constructed...

Zhao, Zhiyong; Tang, Ming; Liao, Huiqi; Ren, Guobin; Fu, Songnian; Yang, Fang; Shum, Perry Ping; Liu, Deming

2014-01-01T23:59:59.000Z

157

ARM - Field Campaign - ASSIST: Atmospheric Sounder Spectrometer for  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govCampaignsASSIST: Atmospheric Sounder Spectrometer for Infrared govCampaignsASSIST: Atmospheric Sounder Spectrometer for Infrared Spectral Technology Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : ASSIST: Atmospheric Sounder Spectrometer for Infrared Spectral Technology 2008.07.08 - 2008.07.18 Lead Scientist : Michael Howard For data sets, see below. Description Goals of assist were to intercompare radiance spectra and profile retrievals from a new AERI-like instrument, called "ASSIST" with the SGP site AERI(s) and calculations from Radiosondes measurements. * To bring the ASSIST instrument to the SGP ACRF and perform simultaneous measurements of the sky radiation with those from the AERI. * On relatively cloud-free days, release a special radiosonde at the

158

Method and apparatus for measuring surface movement of an object using a polarizing interferometer  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading. 38 figs.

Schultz, T.J.; Kotidis, P.A.; Woodroffe, J.A.; Rostler, P.S.

1995-05-09T23:59:59.000Z

159

Quantum Noise in Differential-type Gravitational-wave Interferometer and Signal Recycling  

E-Print Network [OSTI]

There exists the standard quantum limit (SQL), derived from Heisenberg's uncertainty relation, in the sensitivity of laser interferometer gravitational-wave detectors. However, in the context of a full quantum-mechanical approach, SQL can be overcome using the correlation of shot noise and radiation-pressure noise. So far, signal recycling, which is one of the methods to overcome SQL, is considered only in a recombined-type interferometer such as Advanced-LIGO, LCGT, and GEO600. In this paper, we investigated quantum noise and the possibility of signal recycling in a differential-type interferometer. As a result, we found that signal recycling is possible and creates at most three dips in the sensitivity curve of the detector. Then, taking advantage of the third additional dip and comparing the sensitivity of a differential-type interferometer with that of a next-generation Japanese GW interferometer, LCGT, we found that SNR of inspiral binary is improved by a factor of 1.43 for neutron star binary, 2.28 for 50 M_sun black hole binary, and 2.94 for 100 M_sun black hole binary. We also found that power recycling to increase laser power is possible in our signal-recycling configuration of a detector.

Atsushi Nishizawa; Seiji Kawamura; Masa-aki Sakagami

2007-05-31T23:59:59.000Z

160

Design of a speed meter interferometer proof-of-principle experiment  

E-Print Network [OSTI]

The second generation of large scale interferometric gravitational wave detectors will be limited by quantum noise over a wide frequency range in their detection band. Further sensitivity improvements for future upgrades or new detectors beyond the second generation motivate the development of measurement schemes to mitigate the impact of quantum noise in these instruments. Two strands of development are being pursued to reach this goal, focusing both on modifications of the well-established Michelson detector configuration and development of different detector topologies. In this paper, we present the design of the world's first Sagnac speed meter interferometer which is currently being constructed at the University of Glasgow. With this proof-of-principle experiment we aim to demonstrate the theoretically predicted lower quantum noise in a Sagnac interferometer compared to an equivalent Michelson interferometer, to qualify Sagnac speed meters for further research towards an implementation in a future generation large scale gravitational wave detector, such as the planned Einstein Telescope observatory.

C. Grf; B. W. Barr; A. S. Bell; F. Campbell; A. V. Cumming; S. L. Danilishin; N. A. Gordon; G. D. Hammond; J. Hennig; E. A. Houston; S. H. Huttner; R. A. Jones; S. S. Leavey; H. Lck; J. Macarthur; M. Marwick; S. Rigby; R. Schilling; B. Sorazu; A. Spencer; S. Steinlechner; K. A. Strain; S. Hild

2014-09-11T23:59:59.000Z

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161

Experiment Design and First Season Observations with the Degree Angular Scale Interferometer  

E-Print Network [OSTI]

We describe the instrumentation, experiment design and data reduction for the first season of observations with the Degree Angular Scale Interferometer (DASI), a compact microwave interferometer designed to measure anisotropy in the Cosmic Microwave Background (CMB) on degree and sub-degree scales (l=100--900). The telescope was deployed at the Amundsen-Scott South Pole research station during the 1999--2000 austral summer and conducted observations of the CMB throughout the following austral winter. In its first season of observations, DASI has mapped CMB fluctuations in 32 fields, each 3.4 deg across, with high sensitivity.

E. M. Leitch; C. Pryke; N. W. Halverson; J. Kovac; G. Davidson; S. LaRoque; E. Schartman; J. Yamasaki; J. E. Carlstrom; W. L. Holzapfel; M. Dragovan; J. K. Cartwright; B. S. Mason; S. Padin; T. J. Pearson; M. C. Shepherd; A. C. S. Readhead

2001-04-30T23:59:59.000Z

162

Reduction of CCD observations obtained with the Fabry-Perot scanning interferometer. II. Additional Procedures  

E-Print Network [OSTI]

We describe a software package used at the Special Astrophysical Observatory of the Russian Academy of Sciences to reduce and analyze the data obtained with the Fabry-Perot scanning interferometer. We already described most of the algorithms employed in our earlier Paper I (Moiseev, 2002). In this paper we focus on extra procedures required in the case of the use of a high-resolution Fabry-Perot interferometer: removal of ghosts and measurement of the velocity dispersion of ionized gas in galactic and extragalactic objects.

A. V. Moiseev; O. V. Egorov

2008-05-15T23:59:59.000Z

163

Validation experiment of a numerically processed millimeter-wave interferometer in a laboratory  

SciTech Connect (OSTI)

We propose a new interferometer system for density profile measurements. This system produces multiple measurement chords by a leaky-wave antenna driven by multiple frequency inputs. The proposed system was validated in laboratory evaluation experiments. We confirmed that the interferometer generates a clear image of a Teflon plate as well as the phase shift corresponding to the plate thickness. In another experiment, we confirmed that quasi-optical mirrors can produce multiple measurement chords; however, the finite spot size of the probe beam degrades the sharpness of the resulting image.

Kogi, Y., E-mail: kogi@fit.ac.jp; Higashi, T.; Matsukawa, S. [Department of Information Electronics, Fukuoka Institute of Technology, Fukuoka 811-0295 (Japan); Mase, A. [Art, Science and Technology Center for Cooperative Research, Kyushu University, Kasuga, Fukuoka 816-0811 (Japan); Kohagura, J.; Yoshikawa, M. [Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan); Nagayama, Y.; Kawahata, K. [National Institute for Fusion Science, Toki, Gifu 509-5202 (Japan); Kuwahara, D. [Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588 (Japan)

2014-11-15T23:59:59.000Z

164

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM Program Research Improves Longwave Radiative Transfer Models ARM Program Research Improves Longwave Radiative Transfer Models Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Radiative Processes Journal Reference: The QME AERI LBLRTM: A closure experiment for downwelling high spectral resolution infrared radiance. D.D. Turner, D.C. Tobin, S.A. Clough, P.D. Brown, R.G. Ellingson, E.J. Mlawer, R.O. Knuteson, H.E. Revercomb, T.R. Shippert, and W.L. Smith. 2004. Journal of Atmospheric Science, 61, 2657-2675. Top panels: Examples of downwelling infrared radiance observed by the AERI for two different clear sky cases with different amounts of water vapor. Bottom panels: Differences between the AERI observations and calculations

165

Use of the ARM Measurements of Spectral Zenith Radiance for Better Understanding of 3D Cloud-Radiation Processes & Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

We proposed a variety of tasks centered on the following question: what can we learn about 3D cloud-radiation processes and aerosol-cloud interaction from rapid-sampling ARM measurements of spectral zenith radiance? These ARM measurements offer spectacular new and largely unexploited capabilities in both the temporal and spectral domains. Unlike most other ARM instruments, which average over many seconds or take samples many seconds apart, the new spectral zenith radiance measurements are fast enough to resolve natural time scales of cloud change and cloud boundaries as well as the transition zone between cloudy and clear areas. In the case of the shortwave spectrometer, the measurements offer high time resolution and high spectral resolution, allowing new discovery-oriented science which we intend to pursue vigorously. Research objectives are, for convenience, grouped under three themes: ? Understand radiative signature of the transition zone between cloud-free and cloudy areas using data from ARM shortwave radiometers, which has major climatic consequences in both aerosol direct and indirect effect studies. ? Provide cloud property retrievals from the ARM sites and the ARM Mobile Facility for studies of aerosol-cloud interactions. ? Assess impact of 3D cloud structures on aerosol properties using passive and active remote sensing techniques from both ARM and satellite measurements.

Alexander Marshak; Warren Wiscombe; Yuri Knyazikhin; Christine Chiu

2011-05-24T23:59:59.000Z

166

Analysis of a Material Phase Shifting Element in an Atom Interferometer  

E-Print Network [OSTI]

Analysis of a Material Phase Shifting Element in an Atom Interferometer John D. Perreault of the change in phase and coherence of matter waves as they pass within 25 nm of the grating bar surfaceW) interaction [5] changed the relative intensities of the diffraction orders. More recently the atom wave phase

Cronin, Alex D.

167

Observations of rotating jets of carbon monoxide in comet Hale-Bopp with the IRAM interferometer  

E-Print Network [OSTI]

Observations of rotating jets of carbon monoxide in comet Hale-Bopp with the IRAM interferometer;eres, France Abstract. CO was observed on March 11, 1997 in comet Hale-Bopp with the IRAM Plateau de for parent molecules. We have developed a 3-D model simulating rotating spiral jets of CO gas. We present

Demoulin, Pascal

168

Broadband precision wavelength meter based on a stepping FabryProt interferometer  

E-Print Network [OSTI]

Broadband precision wavelength meter based on a stepping Fabry­Pérot interferometer T. J. Scholl. INTRODUCTION Wavelength meters based on Michelson or Fizeau inter- ferometers have long been the standard a more general laser wavelength meter in which the FP ring pattern was employed to compare

Rehse, Steven J.

169

Fiber Fabry-Perot interferometer (FFPI) sensor using vertical cavity surface emitting laser (VCSEL)  

E-Print Network [OSTI]

............................................................................................1 I.B Research objective .............................................................................6 II FIBER FABRY-PEROT INTERFEROMETER (FFPI) SENSOR .................7 II.A Theory...)..............................................................................................14 IV EXPERIMENTAL INVESTIGATION OF VCSELs...................................18 V EXPERIMENTAL INVESTIGATIONS OF FFPI SENSORS MONTORED WITH 850 nm VCSELs ........................................................21 V.A Experimental...

Lee, Kyung-Woo

2006-10-30T23:59:59.000Z

170

1526 OPTICS LETTERS / Vol. 21, No. 19 / October 1, 1996 Phase-shifting point diffraction interferometer  

E-Print Network [OSTI]

1526 OPTICS LETTERS / Vol. 21, No. 19 / October 1, 1996 Phase-shifting point diffraction interferometer H. Medecki Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California, Berkeley, Berkeley, California 94720 K. A. Goldberg Center for X-Ray Optics, Lawrence Berkeley National

Bokor, Jeffrey

171

The Inability of the White-Juday Warp Field Interferometer to Spectrally Resolve Spacetime Distortions  

E-Print Network [OSTI]

This paper contends that the spacetime distortions resulting from the experimentally obtainable electric field of a parallel plate capacitor configuration cannot be detected by the White-Juday Warp Field Interferometer [1]. Any post-processing results indicating a vanishing, non-zero difference between the charged and uncharged states of the capacitor are due to local effects rather than spacetime perturbations.

Jeff Lee; Gerald Cleaver

2014-07-31T23:59:59.000Z

172

PAIRED ACCELERATED FRAMES: THE PERFECT INTERFEROMETER WITH EVERYWHERE SMOOTH WAVE AMPLITUDES \\Lambda  

E-Print Network [OSTI]

PAIRED ACCELERATED FRAMES: THE PERFECT INTERFEROMETER WITH EVERYWHERE SMOOTH WAVE AMPLITUDES In the absence of gravitation the distinguishing feature of any linearly and uniformly accelerated frame event horizons relative to each of the two frames. This acceleration­ induced partitioning of spacetime

Gerlach, Ulrich

173

Design and implementation of a multichannel millimeter wave interferometer for the Compact Toroidal Hybrid experiment  

SciTech Connect (OSTI)

A three-channel 1 mm wave interferometer has been designed, assembled, and installed on the Compact Toroidal Hybrid torsatron (CTH). The interferometer design makes novel use of a subharmonic mixer for detection, which simplifies alignment. It employs a single electronically tunable source that is repetitively chirped using a sawtooth waveform of frequency up to 1 MHz. The 15.25 GHz drive oscillator is multiplied in two stages to 122 GHz before a final doubler stage brings it to 244 GHz. Local oscillator (LO) power at 122 GHz is directed through waveguide to the LO input of the subharmonic mixer of each viewing chord, simplifying alignment. Phase detection is performed by directly digitizing the amplified mixer outputs at 50 MHz and processing them with a software algorithm. Initial measurements made with the central chord of the new interferometer agree with those from the existing 4 mm system at low densities. The 1 mm system performs well in current-driven discharges reaching densities over 10{sup 19} m{sup -3}, whereas the lower frequency interferometer is found to be less reliable due to loss of fringes. This is a critical improvement for experiments studying the onset, avoidance, and vacuum magnetic transform dependence of disruptions in the CTH device.

Miller, M. C.; Hanson, J. D.; Hartwell, G. J.; Knowlton, S. F.; Maurer, D. A.; Stevenson, B. A. [Physics Department, Auburn University, Auburn, Alabama 36849 (United States)

2012-10-15T23:59:59.000Z

174

Energy-phase coupling inside sapphire-based f-2f nonlinear interferometers from 800 to 1940??nm  

Science Journals Connector (OSTI)

Energy-phase coupling inside f-2f nonlinear interferometers poses stringent limits on the tolerable pulse-to-pulse energy fluctuations of phase stable laser systems. Here we report a...

Marceau, Claude; Gingras, Guillaume; Thomas, Steven; Kassimi, Yacine; Witzel, Bernd

2014-01-01T23:59:59.000Z

175

Photonic crystal fiber interferometer composed of a long period fiber grating and one point collapsing of air holes  

Science Journals Connector (OSTI)

We present an all-fiber interferometer fabricated with a single piece of an endless single-mode photonic crystal fiber (PCF) by an electric arc discharge. By forming a long period...

Choi, Hae Young; Park, Kwan Seob; Lee, Byeong Ha

2008-01-01T23:59:59.000Z

176

An ideal experiment to determine the 'past of a particle' in the nested Mach-Zehnder Interferometer  

E-Print Network [OSTI]

An ideal experiment is designed to determine the past of a particle in the nested Mach-Zehnder interferometer (MZI) by using standard quantum mechanics with quantum non-demolition measurements. We find that when the photon reaches the detector, it only follows one arm of the outer interferometer and leaves no trace in the inner MZI; while when it goes through the inner MZI, it cannot reach the detector. Our result obtained from the standard quantum mechanics is contradict to the statement based on two state vector formulism, "the photon did not enter the (inner) interferometer, the photon never left the interferometer, but it was there". Therefore, the statement and also the overlap claim are incorrect.

Fu Li; F. A. Hashmi; Jun-Xiang Zhang; Shi-Yao Zhu

2014-11-14T23:59:59.000Z

177

Speed-of-light effects in high-resolution long-cavity fiber FabryPerot scanning interferometers  

Science Journals Connector (OSTI)

High-resolution fiber FabryPerot scanning interferometers demonstrate bandwidths from 20 MHz to 4 kHz with corresponding cavity lengths from 26 mm to 500 m. Finite speed-of-light...

Hsu, Kevin; Miller, Calvin M; Miller, Jeff W

1993-01-01T23:59:59.000Z

178

Balanced double-loop mesoscopic interferometer based on Josephson proximity nanojunctions  

SciTech Connect (OSTI)

We report on the fabrication and characterization of a two-terminal mesoscopic interferometer based on three V/Cu/V Josephson junctions having nanoscale cross-section. The junctions have been arranged in a double-ring geometry realized by metallic thin film deposition through a suspended mask defined by electron beam lithography. Although a significant amount of asymmetry between the critical current of each junction is observed, we show that the interferometer is able to suppress the supercurrent to a level lower than 6 parts per thousand, being here limited by measurement resolution. The present nano-device is suitable for low-temperature magnetometric and gradiometric measurements over the micrometric scale.

Ronzani, Alberto, E-mail: alberto.ronzani@nano.cnr.it; Altimiras, Carles; Giazotto, Francesco [NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, I-56127 Pisa (Italy)

2014-01-20T23:59:59.000Z

179

Montblanc: GPU accelerated Radio Interferometer Measurement Equations in support of Bayesian Inference for Radio Observations  

E-Print Network [OSTI]

We present Montblanc, a GPU implementation of the Radio interferometer measurement equation (RIME) in support of the Bayesian inference for radio observations (BIRO) technique. BIRO uses Bayesian inference to select sky models that best match the visibilities observed by a radio interferometer. To accomplish this, BIRO evaluates the RIME multiple times, varying sky model parameters to produce multiple model visibilities. Chi-squared values computed from the model and observed visibilities are used as likelihood values to drive the Bayesian sampling process and select the best sky model. As most of the elements of the RIME and chi-squared calculation are independent of one another, they are highly amenable to parallel computation. Additionally, Montblanc caters for iterative RIME evaluation to produce multiple chi-squared values. Only modified model parameters are transferred to the GPU between each iteration. We implemented Montblanc as a Python package based upon NVIDIA's CUDA architecture. As such, it is ea...

Perkins, Simon; Zwart, Jonathan; Natarajan, Iniyan; Smirnov, Oleg

2015-01-01T23:59:59.000Z

180

Holographic Noise in Michelson Interferometers: A Direct Experimental Probe of Unification at the Planck Scale  

ScienceCinema (OSTI)

Classical spacetime and quantum mass-energy form the basis of all of physics. They become inconsistent at the Planck scale, 5.4 times 10^{-44} seconds, which may signify a need for reconciliation in a unified theory. Although proposals for unified theories exist, a direct experimental probe of this scale, 16 orders of magnitude above Tevatron energy, has seemed hopelessly out of reach. However in a particular interpretation of holographic unified theories, derived from black hole evaporation physics, a world assembled out of Planck-scale waves displays effects of unification with a new kind of uncertainty in position at the Planck diffraction scale, the geometric mean of the Planck length and the apparatus size. In this case a new phenomenon may measurable, an indeterminacy of spacetime position that appears as noise in interferometers. The colloquium will discuss the theory of the effect, and our plans to build a holographic interferometer at Fermilab to measure it.

Craig Hogan

2010-01-08T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Implementing the Deutsch's algorithm with spin-orbital angular momentum of photon without interferometer  

E-Print Network [OSTI]

Deutsch's algorithm is the simplest quantum algorithm which shows the acceleration of quantum computer. In this paper, we theoretically advance a scheme to implement quantum Deutsch's algorithm in spin-orbital angular momentum space. Our scheme exploits a newly developed optical device called "q-plate", which can couple and manipulate the spin-orbital angular momentum simultaneously. This experimental setup is of high stability and efficiency theoretically for there is no interferometer in it.

Pei Zhang; Yan Jiang; Rui-Feng Liu; Hong Gao; Hong-Rong Li; Fu-Li Li

2012-07-24T23:59:59.000Z

182

Mirror thermal noise in laser interferometer gravitational wave detectors operating at room and cryogenic temperature  

E-Print Network [OSTI]

Mirror thermal noise is and will remain one of the main limitations to the sensitivity of gravitational wave detectors based on laser interferometers. We report about projected mirror thermal noise due to losses in the mirror coatings and substrates. The evaluation includes all kind of thermal noises presently known. Several of the envisaged substrate and coating materials are considered. The results for mirrors operated at room temperature and at cryogenic temperature are reported.

Janyce Franc; Nazario Morgado; Raffaele Flaminio; Ronny Nawrodt; Iain Martin; Liam Cunningham; Alan Cumming; Sheila Rowan; James Hough

2009-12-01T23:59:59.000Z

183

Detuned Twin-Signal-Recycling for ultra-high precision interferometers  

E-Print Network [OSTI]

We propose a new interferometer technique for high precision phase measurements such as those in gravitational wave detection. The technique utilizes a pair of optically coupled resonators that provides identical resonance conditions for the upper as well the lower phase modulation signal sidebands. This symmetry significantly reduces the noise spectral density in a wide frequency band compared with single sideband recycling topologies of current and planned gravitational wave detectors. Furthermore the application of squeezed states of light becomes less demanding.

Andre Thuering; Roman Schnabel; Harald Lueck; Karsten Danzmann

2007-07-03T23:59:59.000Z

184

The 7-channel FIR HCN Interferometer on J-TEXT Tokamak  

E-Print Network [OSTI]

A seven-channel far-infrared hydrogen cyanide (HCN) laser interferometer has been established aiming to provide the line integrated plasma density for the J-TEXT experimental scenarios. A continuous wave glow discharge HCN laser designed with a cavity length 3.4 m is used as the laser source with a wavelength of 337 {\\mu}m and an output power up to 100 mW. The system is configured as a Mach-Zehnder type interferometer. Phase modulation is achieved by a rotating grating, with a modulation frequency of 10 kHz which corresponds to the temporal resolution of 0.1 ms. The beat signal is detected by TGS detector. The phase shift induced by the plasma is derived by the comparator with a phase sensitivity of 0.06 fringe. The experimental results measured by the J-TEXT interferometer are presented in details. In addition, the inversed electron density profile done by a conventional approach is also given. The kinematic viscosity of dimethyl silicone and vibration control is key issues for the system performance. The laser power stability under different kinematic viscosity of silicone oil is presented. A visible improvement of measured result on vibration reduction is shown in the paper.

Wei Chen; L. Gao; J. Chen; Q. Li; Z. J. Wang; G. Zhuang

2011-11-24T23:59:59.000Z

185

Experimental research on the feature of Talbot-Lau interferometer vs. tube accelerating voltage  

E-Print Network [OSTI]

Talbot-Lau interferometer has been used most widely to perform X-ray phase-contrast imaging with a conventional low-brilliance X-ray source, it yields high-sensitivity phase and dark-field images of sample producing low absorption contrast, thus bearing tremendous potential for future clinical diagnosis. In this manuscript, while changing accelerating voltage of the X-ray tube from 35KV to 45KV, X-ray phase-contrast imaging of a test sample were performed at each integer KV position to investigate the characteristic of a Talbot-Lau interferometer (located in the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Japan.) vs. tube voltage. Experimental results and data analysis show that this Talbot-Lau interferometer is insensitive to the tube accelerating voltage within a certain range, fringe visibility around 44% is maintained in the aforementioned tube voltage range. This experimental research is of guiding significance for choosing optimal tube accelerating voltage with thi...

Wang, Shenghao; Wang, Zhili; Gao, Kun; Zhang, Kai; Momose, Atsushi; Wu, Ziyu

2014-01-01T23:59:59.000Z

186

Linear diffraction grating interferometer with high alignment tolerance and high accuracy  

SciTech Connect (OSTI)

We present an innovative structure of a linear diffraction grating interferometer as a long stroke and nanometer resolution displacement sensor for any linear stage. The principle of this diffractive interferometer is based on the phase information encoded by the {+-}1st order beams diffracted by a holographic grating. Properly interfering these two beams leads to modulation similar to a Doppler frequency shift that can be translated to displacement measurements via phase decoding. A self-compensation structure is developed to improve the alignment tolerance. LightTool analysis shows that this new structure is completely immune to alignment errors of offset, standoff, yaw, and roll. The tolerance of the pitch is also acceptable for most installation conditions. In order to compact the structure and improve the signal quality, a new optical bonding technology by mechanical fixture is presented so that the miniature optics can be permanently bonded together without an air gap in between. For the output waveform signals, a software module is developed for fast real-time pulse counting and phase subdivision. A laser interferometer HP5529A is employed to test the repeatability of the whole system. Experimental data show that within 15 mm travel length, the repeatability is within 15 nm.

Cheng Fang; Fan, Kuang-Chao

2011-08-01T23:59:59.000Z

187

The Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI): Wind and Temperature Observations from the Ionospheric Connection Explorer (ICON)  

Science Journals Connector (OSTI)

We describe the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI), an instrument designed to measure thermospheric wind and temperature as part of the...

Englert, Christoph R; Harlander, John Mark; Brown, Charles M; Stephan, Andrew W; Makela, Jonathan J; Marr, Kenneth D; Immel, Thomas J

188

Analysis and improvements of fringe jump corrections by electronics on the JET tokamak far infrared interferometer  

SciTech Connect (OSTI)

For the Tore Supra interferometer phase measurements, an electronics had been developed electronics using field programmable gate array processors. The embedded algorithm can correct the fringe jumps. For comparison, the electronics ran at JET during the 2009 campaign. The first analysis concluded that the electronics was not correcting all the fringe jumps. An analysis of the failures led to improvements in the algorithm, which was tested during the rest of the campaign. In this article, we evaluate the increases in the performance. From the analysis of the remaining faults, further improvements are discussed for designing future boards that are foreseen for JET using the second wavelength and the Cotton-Mouton effect information.

Gil, C.; Barbuti, A.; Spuig, P. [IRFM, CEA, F-13108 Saint-Paul-lez-Durance (France); Boboc, A.; Dorling, S. [Culham Science Centre, EURATOM-CCFE Fusion Association, Abingdon, Oxon OX14 3DB (United Kingdom); Collaboration: JET EFDA Contributors

2010-10-15T23:59:59.000Z

189

US and European Technology Roadmap for a Mid-infrared Space Interferometer  

E-Print Network [OSTI]

Studies of mid-infrared space interferometer concepts in the USA and in Europe have converged on a single architecture. We address the question of how the US and European communities could collaborate to advance technology efforts leading to a future space mission. We present the current state of the art in nulling interferometry, as demonstrated at ambient temperature and pressure in the lab, and outline required steps to demonstrate its performance under space conditions. Design studies of a cryogenic optical test bench under vacuum have already been carried out. We highlight pre-conditions and constraints of a collaborative effort, foreseeable practical and administrative challenges, and possible strategies to meet those challenges.

Schuller, Peter A; Lay, Olivier P; Lger, Alain; Martin, Stefan R

2013-01-01T23:59:59.000Z

190

Observation of Fresnel diffraction in a two-beam laser interferometer  

Science Journals Connector (OSTI)

A displacement-angle interferometer capable of 10-6 resolution in fringe division was developed for the precise measurement of the silicon (220) lattice spacing by x-ray and optical interferometry. With a view to achieving 10-8 measurement uncertainty, the interference pattern was studied by the Fresnel (Gaussian) scalar approximation of the free-space propagation of interfering beams. Imperfect alignment and diffraction phenomena having been identified, and subsequently experimentally proved, as important error sources, remedial steps were identified and taken with consequent improvement of the experiment accuracy. The investigation brought into light theoretical and experimental evidences of corrections to the interference phase which were overlooked in previous analyses.

A. Bergamin; G. Cavagnero; G. Mana

1994-03-01T23:59:59.000Z

191

Optical layout and mechanical structure of polarimeter-interferometer system for Experimental Advanced Superconducting Tokamak  

SciTech Connect (OSTI)

A Far-InfaRed (FIR) three-wave POlarimeter-INTerferometer (POINT) system for measurement current density profile and electron density profile is under development for the EAST tokamak. The FIR beams are transmitted from the laser room to the optical tower adjacent to EAST via ?20 m overmoded dielectric waveguide and then divided into 5 horizontal chords. The optical arrangement was designed using ZEMAX, which provides information on the beam spot size and energy distribution throughout the optical system. ZEMAX calculations used to optimize the optical layout design are combined with the mechanical design from CATIA, providing a 3D visualization of the entire POINT system.

Zou, Z. Y.; Liu, H. Q., E-mail: hqliu@ipp.ac.cn; Jie, Y. X.; Wang, Z. X.; Shen, J. S.; An, Z. H.; Yang, Y.; Zeng, L.; Wei, X. C.; Li, G. S.; Zhu, X. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Ding, W. X.; Brower, D. L. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States); Lan, T. [Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2014-11-15T23:59:59.000Z

192

Sub-SQL Sensitivity via Optical Rigidity in Advanced LIGO Interferometer with Optical Losses  

E-Print Network [OSTI]

The ``optical springs'' regime of the signal-recycled configuration of laser interferometric gravitational-wave detectors is analyzed taking in account optical losses in the interferometer arm cavities. This regime allows to obtain sensitivity better than the Standard Quantum Limits both for a free test mass and for a conventional harmonic oscillator. The optical losses restrict the gain in sensitivity and achievable signal-to-noise ratio. Nevertheless, for parameters values planned for the Advanced LIGO gravitational-wave detector, this restriction is insignificant.

F. Ya. Khalili; V. I. Lazebny; S. P. Vyatchanin

2005-11-02T23:59:59.000Z

193

Use of the ARM Measurement of Spectral Zenith Radiance For Better Understanding Of 3D Cloud-Radiation Processes and Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

Our proposal focuses on cloud-radiation processes in a general 3D cloud situation, with particular emphasis on cloud optical depth and effective particle size. We also focus on zenith radiance measurements, both active and passive. The proposal has three main parts. Part One exploits the ?¢????solar-background?¢??? mode of ARM lidars to allow them to retrieve cloud optical depth not just for thin clouds but for all clouds. This also enables the study of aerosol cloud interactions with a single instrument. Part Two exploits the large number of new wavelengths offered by ARM?¢????s zenith-pointing ShortWave Spectrometer (SWS), especially during CLASIC, to develop better retrievals not only of cloud optical depth but also of cloud particle size. We also propose to take advantage of the SWS?¢???? 1 Hz sampling to study the ?¢????twilight zone?¢??? around clouds where strong aerosol-cloud interactions are taking place. Part Three involves continuing our cloud optical depth and cloud fraction retrieval research with ARM?¢????s 2NFOV instrument by, first, analyzing its data from the AMF-COPS/CLOWD deployment, and second, making our algorithms part of ARM?¢????s operational data processing.

D. Jui-Yuan Chiu

2010-10-19T23:59:59.000Z

194

Prospects for observing ultra-compact binaries with space-based gravitational wave interferometers and optical telescopes  

E-Print Network [OSTI]

Space-based gravitational wave interferometers are sensitive to the galactic population of ultra-compact binaries. An important subset of the ultra-compact binary population are those stars that can be individually resolved by both gravitational wave interferometers and electromagnetic telescopes. The aim of this paper is to quantify the multi-messenger potential of space-based interferometers with arm-lengths between 1 and 5 Gm. The Fisher Information Matrix is used to estimate the number of binaries from a model of the Milky Way which are localized on the sky by the gravitational wave detector to within 1 and 10 square degrees and bright enough to be detected by a magnitude limited survey. We find, depending on the choice of GW detector characteristics, limiting magnitude, and observing strategy, that up to several hundred gravitational wave sources could be detected in electromagnetic follow-up observations.

Tyson B. Littenberg; Shane L. Larson; Gijs Nelemans; Neil J. Cornish

2012-07-20T23:59:59.000Z

195

Prospects for observing ultra-compact binaries with space-based gravitational wave interferometers and optical telescopes  

E-Print Network [OSTI]

Space-based gravitational wave interferometers are sensitive to the galactic population of ultra-compact binaries. An important subset of the ultra-compact binary population are those stars that can be individually resolved by both gravitational wave interferometers and electromagnetic telescopes. The aim of this paper is to quantify the multi-messenger potential of space-based interferometers with arm-lengths between 1 and 5 Gm. The Fisher Information Matrix is used to estimate the number of binaries from a model of the Milky Way which are localized on the sky by the gravitational wave detector to within 1 deg$^2$ and bright enough to be detected by a magnitude limited survey. We find, depending on the choice of GW detector characteristics, limiting magnitude, and observing strategy, that up to a few hundred gravitational wave sources could be detected in electromagnetic follow-up observations.

Littenberg, Tyson B; Nelemans, Gijs; Cornish, Neil J

2012-01-01T23:59:59.000Z

196

Measurement method for roll angular displacement with a high resolution by using diffraction gratings and a heterodyne interferometer  

SciTech Connect (OSTI)

The roll angle measurement is difficult to be achieved directly using a typical commercial interferometer due to its low sensitivity in axial direction, where the axial direction is orthogonal to the plane of the roll angular displacement. A roll angle measurement method combined diffraction gratings with a laser heterodyne interferometer is discussed in this paper. The diffraction grating placed in the plane of a roll angular displacement and the interferometer arranged in the plane's orthogonal direction, constitute the measurement pattern for the roll angle with high resolution. The roll angular displacement, considered as the linear, can be tested precisely when the corresponding angle is very small. Using the proposed method, the angle roll measurement obtains the high resolution of 0.002{sup ?}. Experiment has proved its feasibility and practicability.

Tang, Shanzhi, E-mail: shanzhit@gmail.com [Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China) [Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China); School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049 (China); Wang, Zhao [School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)] [School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049 (China); Gao, Jianmin; Guo, Junjie [State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710054 (China)] [State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710054 (China)

2014-04-15T23:59:59.000Z

197

Quantum noise of non-ideal Sagnac speed meter interferometer with asymmetries  

E-Print Network [OSTI]

The speed meter concept has been identified as a technique that can potentially provide laser-interferometric measurements at a sensitivity level which surpasses the Standard Quantum Limit (SQL) over a broad frequency range. As with other sub-SQL measurement techniques, losses play a central role in speed meter interferometers and they ultimately determine the quantum noise limited sensitivity that can be achieved. So far in the literature, the quantum noise limited sensitivity has only been derived for lossless or lossy cases using certain approximations (for instance that the arm cavity round trip loss is small compared to the arm cavity mirror transmission). In this article we present a generalised, analytical treatment of losses in speed meters that allows accurate calculation of the quantum noise limited sensitivity of Sagnac speed meters with arm cavities. In addition, our analysis allows us to take into account potential imperfections in the interferometer such as an asymmetric beam splitter or differences of the reflectivities of the two arm cavity input mirrors. Finally,we use the examples of the proof-of-concept Sagnac speed meter currently under construction in Glasgow and a potential implementation of a Sagnac speed meter in the Einstein Telescope (ET) to illustrate how our findings affect Sagnac speed meters with meter- and kilometre-long baselines.

S. L. Danilishin; C. Graef; S. S. Leavey; J. Hennig; E. A. Houston; D. Pascucci; S. Steinlechner; J. Wright; S. Hild

2014-12-02T23:59:59.000Z

198

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Development and Recent Evaluation of the MT_CKD Model of Continuum Development and Recent Evaluation of the MT_CKD Model of Continuum Absorption Download a printable PDF Submitter: Mlawer, E. J., Atmospheric & Environmental Research, Inc. Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Mlawer EJ, VH Payne, J Moncet, JS Delamere, MJ Alvarado, and DD Tobin. 2012. "Development and recent evaluation of the MT_CKD model of continuum absorption." Philosophical Transactions of The Royal Society A, 370, doi: 10.1098/rsta.2011.0295. For seven AERI cases with 4-6 cm PWV: (a) average AERI radiances (black) and corresponding calculations using radiation code with previous version of MT_CKD continuum model (red); (b) residuals between AERI and calculations with older model; (c) residuals after the CO2 continuum in

199

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

New Meteorological Applications Using AERI Thermodynamic Profiling New Meteorological Applications Using AERI Thermodynamic Profiling Feltz, W.F.(a), Howell, H.B.(a), Knuteson, R.O.(a), Mecikalski, J.(b), Bedka, K.(a), Tanamachi, R.L.(c), and Posselt, D.(d), University of Wisconsin SSEC/CIMSS (a), University of Alabama - Huntsville (b), University of Oklahoma (c), Colorado State University (d) The DOE ARM program has supported the development of a robust and operational thermodynamic retrieval algorithm using AERI high spectral resolution infrared radiances. These retrievals of temperature and water vapor have been used for a number of ARM research projects including planetary boundary layer (PBL) large eddy simulation, NWP validation, PBL height estimation, and for investigating the utility of driving SCM/CRM models continuously at the SGP site. New AERIplus retrieval meteorological

200

Q-switching of a high-power solid-state laser by a fast scanning Fabry-Perot interferometer  

SciTech Connect (OSTI)

An investigation was made of the suitability of a Q-switch, based on a piezoelectrically scanned short-base Fabry-Perot interferometer, for an Nd{sup 3+}:YAG laser with an average output radiation power up to 2 kW. The proposed switch made it possible to generate of giant pulses of 60 - 300 ns duration at a repetition rate of 20 - 100 kHz. Throughout the investigated range of the pulse repetition rates the average power was at least equal to that obtained by cw lasing. Special requirements to be satisfied by the interferometer, essential for efficient Q-switching, were considered. (control of laser radiation parameters)

Baburin, N V; Borozdov, Yu V; Danileiko, Yu K; Denker, B I; Ivanov, A D; Osiko, Vyacheslav V; Sverchkov, S E; Sidorin, A V; Chikov, V A [Laser Materials and Technology Research Center, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation); Ifflander, R; Hack, R [Haas-Laser GmbH, Schramberg (Germany); Kertesz, I; Kroo, N [Research Institute for Solid State Physics, Budapest XII (Hungary)

1998-07-31T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Mach-Zehnder Bragg interferometer for a Bose-Einstein condensate Yoshio Torii,* Yoichi Suzuki, Mikio Kozuma, Toshiaki Sugiura, and Takahiro Kuga  

E-Print Network [OSTI]

. This results in high efficiency 14 where, in principle, all of the atoms can contribute to the signal. NormalMach-Zehnder Bragg interferometer for a Bose-Einstein condensate Yoshio Torii,* Yoichi Suzuki a Mach-Zehnder interferometer using Bose-Einstein condensed rubidium atoms and optical Bragg diffraction

Torii, Yoshio

202

Evaluating Radiative Closure in the Middle-to-Upper Troposhere  

SciTech Connect (OSTI)

This project had two general objectives. The first is the characterization and improvement of the radiative transfer parameterization in strongly absorbing water vapor bands, as these strongly absorbing bands dictate the clear sky radiative heating rate. The second is the characterization and improvement of the radiative transfer in cirrus clouds, with emphasis on ensuring that the parameterization of the radiative transfer is consistent and accurate across the spectrum. Both of these objectives are important for understanding the radiative processes in the mid-to-upper troposphere. The research on this project primarily involved analysis of data from the First and Second Radiative Heating in Underexplored Bands Campaigns, RHUBC-I and II. This included a climate model sensitivity study using results from RHUBC-I. The RHUBC experiments are ARM-funded activities that directly address the objectives of this research project. A secondary effort was also conducted that investigated the trends in the long-term (~14 year) dataset collected by the Atmospheric Emitted Radiance Interferometer (AERI) at the ARM Southern Great Plains site. This work, which was primarily done by a post-doc at the University of Wisconsin ???????¢???????????????? Madison under Dr. Turner???????¢????????????????s direction, uses the only NIST-traceable instrument at the ARM site that has a well-documented calibration and uncertainty performance to investigate long-term trends in the downwelling longwave radiance above this site.

Tobin, David C; Turner, David D; Knuteson, Robert O

2013-01-02T23:59:59.000Z

203

2D grating simulation for X-ray phase-contrast and dark-field imaging with a Talbot interferometer  

SciTech Connect (OSTI)

Talbot interferometry is a recently developed and an extremely powerful X-ray phase-contrast imaging technique. Besides giving access to ultra-high sensitivity differential phase contrast images, it also provides the dark field image, which is a map of the scattering power of the sample. In this paper we investigate the potentialities of an improved version of the interferometer, in which two dimensional gratings are used instead of standard line grids. This approach allows to overcome the difficulties that might be encountered in the images produced by a one dimensional interferometer. Among these limitations there are the phase wrapping and quantitative phase retrieval problems and the directionality of the differential phase and dark-field signals. The feasibility of the 2D Talbot interferometer has been studied with a numerical simulation on the performances of its optical components under different circumstances. The gratings can be obtained either by an ad hoc fabrication of the 2D structures or by a superposition of two perpendicular linear grids. Through this simulation it has been possible to find the best parameters for a practical implementation of the 2D Talbot interferometer.

Zanette, Irene; Weitkamp, Timm [European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble (France); David, Christian; Rutishauser, Simon [Paul Scherrer Insitute, 5232 Villigen PSI (Switzerland)

2010-04-06T23:59:59.000Z

204

Probability distribution function for inclinations of merging compact binaries detected by gravitational wave interferometers  

E-Print Network [OSTI]

We analytically discuss probability distribution function (PDF) for inclinations of merging compact binaries whose gravitational waves are coherently detected by a network of ground based interferometers. The PDF would be useful for studying prospects of (1) simultaneously detecting electromagnetic signals (such as gamma-ray-bursts) associated with binary mergers and (2) statistically constraining the related theoretical models from the actual observational data of multi-messenger astronomy. Our approach is similar to Schutz (2011), but we explicitly include the dependence of the polarization angles of the binaries, based on the concise formulation given in Cutler and Flanagan (1994). We find that the overall profiles of the PDFs are similar for any networks composed by the second generation detectors (Advanced-LIGO, Advanced-Virgo, KAGRA, LIGO-India). For example, 5.1% of detected binaries would have inclination angle less than 10 degree with at most 0.1% differences between the potential networks. A perturb...

Seto, Naoki

2014-01-01T23:59:59.000Z

205

Sensitivity improvement of a laser interferometer limited by inelastic back-scattering, employing dual readout  

E-Print Network [OSTI]

Inelastic back-scattering of stray light is a long-standing problem in high-sensitivity interferometric measurements and a potential limitation for advanced gravitational-wave detectors, in particular at sub-audio-band frequencies. The emerging parasitic interferences cannot be distinguished from a scientific signal via conventional single readout. In this work, we propose and demonstrate the subtraction of inelastic back-scatter signals by employing dual homodyne detection on the output light -- here -- of a table-top Michelson interferometer. The additional readout contains solely parasitic signals and is used to model the scatter source. Subtraction of the scatter signal reduces the noise spectral density and thus improves the measurement sensitivity. Our scheme is qualitatively different from the previously demonstrated vetoing of scatter signals and opens a new path for improving the sensitivity of future gravitational-wave detectors.

Meinders, Melanie

2015-01-01T23:59:59.000Z

206

Faraday-effect polarimeter-interferometer system for current density measurement on EAST  

SciTech Connect (OSTI)

A multichannel far-infrared laser-based POlarimeter-INTerferometer (POINT) system utilizing the three-wave technique is under development for current density and electron density profile measurements in the EAST tokamak. Novel molybdenum retro-reflectors are mounted in the inside wall for the double-pass optical arrangement. A Digital Phase Detector with 250 kHz bandwidth, which will provide real-time Faraday rotation angle and density phase shift output, have been developed for use on the POINT system. Initial calibration indicates the electron line-integrated density resolution is less than 5 10{sup 16} m{sup ?2} (?2), and the Faraday rotation angle rms phase noise is <0.1.

Liu, H. Q.; Jie, Y. X., E-mail: yx-jie@ipp.ac.cn; Zou, Z. Y.; Li, W. M.; Wang, Z. X.; Qian, J. P.; Yang, Y.; Zeng, L.; Wei, X. C.; Hu, L. Q.; Wan, B. N. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Ding, W. X.; Brower, D. L. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States); Lan, T.; Li, G. S. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); University of Science and Technology of China, Hefei, Anhui 230026 (China)

2014-11-15T23:59:59.000Z

207

Correlated magnetic noise in global networks of gravitational-wave interferometers: observations and implications  

E-Print Network [OSTI]

One of the most ambitious goals of gravitational-wave astronomy is to observe the stochastic gravitational-wave background. Correlated noise in two or more detectors can introduce a systematic error, which limits the sensitivity of stochastic searches. We report on measurements of correlated magnetic noise from Schumann resonances at the widely separated LIGO and Virgo detectors. We investigate the effect of this noise on a global network of interferometers and derive a constraint on the allowable coupling of environmental magnetic fields to test mass motion in gravitational-wave detectors. We find that while correlated noise from global electromagnetic fields could be safely ignored for initial LIGO stochastic searches, it could severely impact Advanced LIGO and third-generation detectors.

Eric Thrane; Nelson Christensen; Robert Schofield

2013-03-11T23:59:59.000Z

208

Recent developments of the JET far-infrared interferometer-polarimeter diagnostic  

SciTech Connect (OSTI)

The far-infrared diagnostic provides essential internal measurements of the plasma density and magnetic field topology (q-profile via Faraday rotation angle) in real-time. The diagnostic capabilities have recently been extended in a number of key areas. Fast interferometer data, with 10 {mu}s time resolution, and a new MATLAB code have allowed improved analysis of the evolution of density profiles during fast events such as vertical plasma displacements, edge localized mode, pellet fuelling, and disruptions. Using the polarimeter measurements in real-time, a new calibration procedure has been developed based on a propagation code using the Mueller matrix formalism. A further major upgrade of the system is presently underway: adding a second color laser to the vertical channels and implementing a new phase counter based on analog zero crossing and field-programmable gate array boards.

Boboc, A. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom); Gelfusa, M.; Gaudio, P. [Associazione EURATOM-ENEA, University of Rome ''Tor Vergata'', 00173 Roma (Italy); Murari, A. [Consorzio RFX, Assoc. EURATOM ENEA sulla Fusione, Corso Stati Uniti 4, I-35127 Padova (Italy); Collaboration: JET-EFDA Contributors

2010-10-15T23:59:59.000Z

209

Precisely mapping the magnetic field gradient in vacuum with an atom interferometer  

SciTech Connect (OSTI)

The magnetic field gradient has been measured with an atom interferometer using the magnetic sublevels of {sup 87}Rb atoms. The Doppler-insensitive measurement effectively eliminates the contribution from gravity and background vibration noise, and the differential measurement also can reject some systematic errors. A resolution of 300 pT/mm has been demonstrated with a 90-s integration time and a spatial resolution of 1.4 mm. The gradiometer was then used to measure the magnetic field gradient in an ultrahigh-vacuum environment. The technique will also be very useful to subtract the systematic error arising from the magnetic field inhomogeneity in precision atom-interferometry experiments, such as gravity measurement.

Zhou Minkang; Hu Zhongkun; Duan Xiaochun; Sun Buliang; Zhao Jinbo; Luo Jun [School of Physics, Huazhong University of Science and Technology, Wuhan 430074 (China)

2010-12-15T23:59:59.000Z

210

Measurement of two-dimensional small angle deviation with a prism interferometer  

SciTech Connect (OSTI)

A new technique for the measurement of two-dimensional small angular deviation is presented. A compound prism, which effectively produces a combination of two right-angled prisms in orthogonal directions, and plane reference surfaces have been utilized for the measurement of the orthogonal components of the angular tilt of an incident plane wavefront. Each orthogonal component of the angular tilt is separately measured from the angular rotation of the resultant wedge fringes between two plane wavefronts generated due to splitting of the incident plane wavefront by the corresponding set of right-angled prism and plane reference surface. The technique is shown to have high sensitivity for the measurement of small angle deviation. A monolithic prism interferometer, which is practically insensitive to vibration, is also proposed. Results obtained for the measurement of a known tilt angle are presented.

Chatterjee, Sanjib; Kumar, Y. Pavan

2008-09-20T23:59:59.000Z

211

Controlled Dephasing of an Electron Interferometer with a Path Detector at Equilibrium  

Science Journals Connector (OSTI)

Controlled dephasing of electrons, via which path detection, involves, in general, coupling a coherent system to a current driven noise source. However, here we present a case in which a nearly isolated electron puddle within a quantum dot, at thermal equilibrium and in millikelvin range temperature, fully dephases the interference in a nearby electronic interferometer. Moreover, the complete dephasing is accompanied by an abrupt ? phase slip, which is robust and nearly independent of system parameters. Attributing the robustness of the phenomenon to the Friedel sum rulewhich relates a systems occupation to its scattering phasesproves the universality of this powerful rule. The experiment allows us to peek into a nearly isolated quantum dot, which cannot be accessed via conductance measurements.

E. Weisz; H. K. Choi; M. Heiblum; Yuval Gefen; V. Umansky; D. Mahalu

2012-12-18T23:59:59.000Z

212

A 250 GHz microwave interferometer for divertor experiments on DIII-D  

SciTech Connect (OSTI)

A new 250 GHz, two-frequency microwave interferometer system has been developed to diagnose divertor plasmas on DIII-D. This diagnostic will measure the line-averaged density across both the inner and outer, lower divertor legs. With a cut-off density of over 7 {times} 10{sup 14} cm{sup {minus}3}, temporal measurements of ELMs, MARFs and plasma detachment are expected. The outer leg system will use a double pass method while the inner leg system will be single pass. Two special 3D carbon composite tiles are used, one to protect the microwave antennas mounted directly under the strike point and the other as the outer leg reflecting surface. Performance, design constraints, and the thermalmechanical design of the 3D carbon composite tiles are discussed.

James, R.A.; Nilson, D.G.; Stever, R.D.; Hill, D.N.; Casper, T.A.

1994-01-31T23:59:59.000Z

213

Axial-scanning low-coherence interferometer method for noncontact thickness measurement of biological samples  

SciTech Connect (OSTI)

We investigated a high-precision optical method for measuring the thickness of biological samples regardless of their transparency. The method is based on the precise measurement of optical path length difference of the end surfaces of objects, using a dual-arm axial-scanning low-coherence interferometer. This removes any consideration of the shape, thickness, or transparency of testing objects when performing the measurement. Scanning the reference simplifies the measurement setup, resulting in unambiguous measurement. Using a 1310 nm wavelength superluminescent diode, with a 65 nm bandwidth, the measurement accuracy was as high as 11.6 {mu}m. We tested the method by measuring the thickness of both transparent samples and nontransparent soft biological tissues.

Kim, Do-Hyun; Song, Chul-Gyu; Ilev, Ilko K.; Kang, Jin U.

2011-02-20T23:59:59.000Z

214

Flexture plate motion-transfer mechanism, beam-splitter assembly, and interferometer incorporating the same  

DOE Patents [OSTI]

A multiplicity of one-piece flexure plates are assembled in pairs to provide a support system on which a retroreflector may be mounted for reciprocal motion. Combined with balance bodies, the flexure plates provide a support system having portions that are dynamically and statically balanced with one another, irrespective of orientation, so as to thereby immunize the unit against extraneous forces. The motion transfer assembly is especially adapted for use to support a moving retroreflector in a two-arm interferometer that may further include a beamsplitter assembly constructed from a one-piece, integrally formed body, the body having convergent, optically flat planar surfaces of specular reflectance, and means for adjustably mounting a beamsplitter therein. The spectrometer is of modular construction, and employs an integrated clocking sub-assembly as well as a light-weight voice-coil motor.

Carangelo, Robert M. (Glastonbury, CT); Dettori, Mark D. (Farmington, CT); Grigely, Lawrence J. (South Windsor, CT); Murray, Terence C. (Winchester, MA); Solomon, Peter R. (West Hartford, CT); Van Dine, C. Peter (Bolton, CT); Wright, David D. (Vershire, VT)

1996-01-01T23:59:59.000Z

215

High-Speed X-ray Phase Imaging with Grating Interferometer and White Synchrotron Light  

SciTech Connect (OSTI)

Taking advantage of the fact that an X-ray Talbot interferometer functions with X-rays of a broad energy band width, high-speed X-ray phase imaging and tomography have been achieved by using white synchrotron light. An X-ray phase tomogram could be measured with a 0.25 s exposure. Furthermore, a series of X-ray phase tomograms, in other words, a four-dimensional X-ray phase tomogram, could be reconstructed with a tomogram frame rate of 25.5 fps. This achievement advances X-ray phase imaging/tomography from a technique for static imaging to one for dynamic imaging of weakly absorbing objects.

Momose, Atsushi; Yashiro, Wataru; Huang, Shaohua; Kuwabara, Hiroaki; Kawabata, Katsuyuki [Graduate School of Frontier Sciences, University of Tokyo, 5-1-5 Kashiwanoka, Kashiwa, Chiba 277-8561 (Japan)

2010-06-23T23:59:59.000Z

216

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERI-ER at the SHEBA Ice Station: Far Infrared H2O Continuum AERI-ER at the SHEBA Ice Station: Far Infrared H2O Continuum Submitter: Revercomb, H. E., University of Wisconsin, Madison Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Tobin, D.C., F.A. Best, P.D. Brown, S.A. Clough, R.G. Dedecker, R.G. Ellingson, R.K. Garcia, H.B. Howell, R.O. Knuteson, E.J. Mlawer, H.E. Revercomb, J.F. Short, P.F.W. van Delst, and V.P. Walden, 1999. "Downwelling spectral radiance observations at the SHEBA ice station: Water vapor continuum measurements from 17 to 26μm," JGR 104(D2): 2081-2092 Figure 1. Comparison of clear sky downwelling radiance spectra measured with the University of Wisconsin AERI system at the SGP CART site near Lamont, Oklahoma and with the extended range AERI at the SHEBA Ice Station,

217

ARM - Measurement - Shortwave broadband radiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

0.4 and 4 mu, emitted by a radiator in a given direction, expressed in units of energy per unit time per unit solid angle. Categories Radiometric Instruments The above...

218

Small-sized Mach-Zehnder Interferometer Optical Switch Using Thin Film Ge2Sb2Te5 Phase-change Material  

Science Journals Connector (OSTI)

Small-sized Mach-Zehnder Interferometer optical switch using Ge2Sb2Te5 thin films was fabricated. Two thin films of 1-?m-square were sufficient for switching. The switching...

Moriyama, Takumi; Kawashima, Hitoshi; Kuwahara, Masashi; Wang, Xiaomin; Asakura, Hideaki; Tsuda, Hiroyuki

219

Adding static printing capabilities to the EUV phase-shifting point diffraction interferometer  

SciTech Connect (OSTI)

While interferometry is routinely used for the characterization and alignment of lithographic optics, the ultimate performance metric for these optics is printing in photoresist. Direct comparison of imaging and wavefront performance is also useful for verifying and improving the predictive power of wavefront metrology under actual printing conditions. To address these issues, static, small-field printing capabilities are being added to the extreme ultraviolet (EUV) phase-shifting point diffraction interferometer (PS/PDI) implemented at the Advanced Light Source at Lawrence Berkeley National Laboratory. This Sub-field Exposure Station (SES) will enable the earliest possible imaging characterization of the upcoming Engineering Test Stand (ETS) Set-2 projection optics. Relevant printing studies with the ETS projection optics require illumination partial coherence with {sigma} of approximately 0.7. This {sigma} value is very different from the coherent illumination requirements of the EUV PS/PDI and the coherence properties naturally provided by synchrotron undulator beamline illumination. Adding printing capabilities to the PS/PDI experimental system thus necessitates the development of an alternative illumination system capable of destroying the inherent coherence of the beamline. The SES is being implemented with two independent illuminators: the first is based on a novel EUV diffuser currently under development and the second is based on a scanning mirror design. Here we describe the design and implementation of the new SES, including a discussion of the illuminators and the fabrication of the EUV diffuser.

Naulleau, Patrick; Goldberg, Kenneth A.; Anderson, Erik H.; Batson, Phillip; Denham, Paul; Jackson, Keith; Rekawa, Seno; Bokor, Jeffery

2001-03-01T23:59:59.000Z

220

PLANETARY TRANSITS WITH THE ATACAMA LARGE MILLIMETER/SUBMILLIMETER ARRAY RADIO INTERFEROMETER  

SciTech Connect (OSTI)

Planetary transits are commonly observed at visible wavelengths. Here we investigate the shape of a planetary transit observed at radio wavelengths. Solar maps at 17 GHz are used as a proxy for the stellar eclipse by several sizes of planets from super-Earths to hot Jupiters. The relative depth at mid-transit is the same as observed at visible wavelengths, but the limb brightening of the stellar disk at 17 GHz is clearly seen in the shape of the transit light curve. Moreover, when the planet occults an active region the depth of the transit decreases even further, depending on the brightness of the active region relative to the surrounding disk. For intense active region, with 50 times the brightness temperature of the surrounding disk, the decrease can supercede the unperturbed transit depth depending on the size of the eclipsing planet. For a super-Earth (R{sub p} = 0.02 R{sub s} ) crossing, the decrease in intensity is 0.04%, increasing to 0.86% in the case when a strong active region is present. On the other hand, for a hot Jupiter with R{sub p} = 0.17R{sub s} , the unperturbed transit depth is 3% increasing to 4.7% when covering this strong active region. This kind of behavior can be verified with observation of planetary transits with the Atacama Large Millimeter/submillimeter Array radio interferometer.

Selhorst, C. L.; Barbosa, C. L. [IP and D, Universidade do Vale do Paraba (UNIVAP), So Jos dos Campos, SP (Brazil)] [IP and D, Universidade do Vale do Paraba (UNIVAP), So Jos dos Campos, SP (Brazil); Vlio, Adriana, E-mail: caius@univap.br [CRAAM, Universidade Presbiteriana Mackenzie, So Paulo, SP (Brazil)] [CRAAM, Universidade Presbiteriana Mackenzie, So Paulo, SP (Brazil)

2013-11-10T23:59:59.000Z

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221

A METHOD TO EXTRACT THE ANGULAR POWER SPECTRUM OF THE EPOCH OF REIONIZATION FROM LOW-FREQUENCY RADIO INTERFEROMETERS  

SciTech Connect (OSTI)

The redshifted 21 cm signal of neutral hydrogen from the epoch of reionization (EoR) is extremely weak and its first detection is therefore expected to be statistical with first-generation low-frequency radio interferometers. In this Letter, we propose a method to extract the angular power spectrum of the EoR from the visibility correlation coefficients p{sub ij} (u, v), instead of the visibilities V{sub ij} (u, v) measured directly by radio interferometers in conventional algorithm. The visibility correlation coefficients are defined as p{sub ij}(u,v)=V{sub ij}(u,v)/{radical}(|V{sub ii}||V{sub jj}|) by introducing the autocorrelation terms V{sub ii} and V{sub jj} such that the angular power spectrum C{sub l} can be obtained through C{sub l} = T {sup 2}{sub 0}(|p{sub ij} (u, v)|{sup 2}), independently of the primary beams of antennas. This also partially removes the influence of receiver gains in the measurement of C{sub l} because the amplitudes of the gains cancel each other out in the statistical average operation of (|p{sub ij} (u, v)|{sup 2}). We use the average system temperature T{sub 0} as a calibrator of C{sub l}, which is dominated by the Milky Way and extragalactic sources in the frequency range that we are interested in, below 200 MHz. Finally, we demonstrate the feasibility of this novel method using the simulated sky maps as targets and the 21 CentiMeter Array (21CMA) as interferometer.

Zheng Qian; Wu Xiangping; Gu Junhua [National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); Wang Jingying; Xu Haiguang [Department of Physics, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China)

2012-10-10T23:59:59.000Z

222

Use of the Far Infrared Tangential Interferometer/Polarimeter diagnostic for the study of rf driven plasma waves on NSTX  

SciTech Connect (OSTI)

A rf detection system for waves in the 30 MHz range has been constructed for the Far Infrared Tangential Interferometer/Polarimeter on National Spherical Torus Experiment (NSTX). It is aimed at monitoring high frequency density fluctuations driven by 30 MHz high harmonic fast wave fields. The levels of density fluctuations at various radial chords and antenna phase angles can be estimated using the electric field calculated by TORIC code and linearized continuity equation for the electron density. In this paper, the experimental arrangement for the detection of rf signal and preliminary results of simulation will be discussed.

Kim, J.; Park, H. [Department of Physics, POSTECH, Pohang, Gyeongbuk 790-784 (Korea, Republic of); Lee, K. C.; Domier, C. W.; Luhmann, N. C. Jr. [University of California at Davis, Davis, California 95616 (United States); Kaita, R.; Phillips, C. K.; Valeo, E. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Bonoli, P. T. [Plasma Science and Fusion Center, MIT, Cambridge, Massachusetts (United States)

2010-10-15T23:59:59.000Z

223

Generalized Collective States and Their Role in a Collective State Atomic Interferometer and Atomic Clock  

E-Print Network [OSTI]

We investigate the behavior of an ensemble of N non-interacting, identical atoms, excited by a laser with a wavelength of $\\lambda$. In general, the i-th atom sees a Rabi frequency $\\Omega_i$, an initial position dependent laser phase $\\phi_i$, and a motion induced Doppler shift of $\\delta_i$. When $\\Omega_i=\\Omega$ and $\\delta_i=\\delta$ for all atoms, the system evolves into a superposition of (N+1) symmetric collective states (SCS), independent of the values of $\\phi_i$. If $\\phi_i=\\phi$ for all atoms, these states simplify to the well-known Dicke collective states. When $\\Omega_i$ or $\\delta_i$ is distinct for each atom, the system evolves into a superposition of SCS as well as asymmetric collective states (ACS). For large N, the number of ACS's $(2^N-N-1)$ is far greater than that of the SCS. We show how to formulate the properties of all the collective states under various non-idealities, and use this formulation to understand the dynamics thereof. For the case where $\\Omega_i=\\Omega$ and $\\delta_i=\\delta$ for all atoms, we show how to determine the amplitudes of the generalized collective states in a simple manner. For the case where $\\Omega_i$ or $\\delta_i$ is distinct for each atom, we show how the SCS and ACS's can be treated on the same footing. Furthermore, we show that the collective states corresponding to the absorption of a given number of photons can be visualized as an abstract, multi-dimensional rotation in the Hilbert space spanned by the ordered product states of individual atoms. We also consider the effect of treating the center of mass degree of freedom of the atoms quantum mechanically on the description of the collective states. Specifically, we show that it is indeed possible to construct a generalized collective state, as needed for the collective state atomic interferometer we recently proposed, when each atom is assumed to be in a localized wave packet.

Resham Sarkar; May E. Kim; Renpeng Fang; Yanfei Tu; Selim M. Shahriar

2014-08-11T23:59:59.000Z

224

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Downwelling Infrared Radiance Climatology for the ARM Southern Great A Downwelling Infrared Radiance Climatology for the ARM Southern Great Plains Site Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Gero, J., University of Wisconsin Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Turner DD and PJ Gero. 2011. "Downwelling infrared radiance temperature climatology for the Atmospheric Radiation Measurement Southern Great Plains site." Journal of Geophysical Research - Atmospheres, 116, D08212, doi:10.1029/2010JD015135. The distribution of downwelling 10-micron infrared radiance observed at the SGP site by the AERI from June 1996 to May 2010, separated into all-sky (all samples) and the three distinct sky classifications.

225

Measurements of Spatially Resolved Velocity Variations in Shock Compressed Heterogeneous Materials Using a Line-Imaging Velocity Interferometer  

SciTech Connect (OSTI)

Relatively straightforward changes in the optical design of a conventional optically recording velocity interferometer system (ORVIS) can be used to produce a line-imaging velocity interferometer wherein both temporal and spatial resolution can be adjusted over a wide range. As a result line-imaging ORVIS can be tailored to a variety of specific applications involving dynamic deformation of heterogeneous materials as required by the characteristic length scale of these materials (ranging from a few {micro}m for ferroelectric ceramics to a few mm for concrete). A line-imaging ORVIS has been successfully interfaced to the target chamber of a compressed gas gun driver and fielded on numerous tests in combination with simultaneous measurements using a dual delay-leg, ''push-pull'' VISAR system. These tests include shock loading of glass-reinforced polyester composites, foam reverberation experiments (measurements at the free surface of a thin aluminum plate impacted by foam), and measurements of dispersive velocity in a shock-loaded explosive simulant (sugar). Comparison of detailed spatially-resolved material response to the spatially averaged VISAR measurements will be discussed.

ASAY,JAMES R.; CHHABILDAS,LALIT C.; KNUDSON,MARCUS D.; TROTT,WAYNE M.

1999-09-01T23:59:59.000Z

226

Testing General Relativity and Alternative Theories of Gravity with Space-based Atomic Clocks and Atom Interferometers  

E-Print Network [OSTI]

The successful miniaturisation of extremely accurate atomic clocks and atom interferometers invites prospects for satellite missions to perform precision experiments. We discuss the effects predicted by general relativity and alternative theories of gravity that can be detected by a clock, which orbits the Earth. Our experiment relies on the precise tracking of the spacecraft using its observed tick-rate. The spacecraft's reconstructed four-dimensional trajectory will reveal the nature of gravitational perturbations in Earth's gravitational field, potentially differentiating between different theories of gravity. This mission can measure multiple relativistic effects all during the course of a single experiment, and constrain the Parametrized Post-Newtonian Parameters around the Earth. A satellite carrying a clock of fractional timing inaccuracy of $\\Delta f/f \\sim 10^{-16}$ in an elliptic orbit around the Earth would constrain the PPN parameters $|\\beta -1|, |\\gamma-1| \\lesssim 10^{-6}$. We also briefly review potential constraints by atom interferometers on scalar tensor theories and in particular on Chameleon and dilaton models.

Ruxandra Bondarescu; Andreas Schrer; Philippe Jetzer; Raymond Anglil; Prasenjit Saha; Andrew Lundgren

2014-12-05T23:59:59.000Z

227

CO{sub 2} laser-based dispersion interferometer utilizing orientation-patterned gallium arsenide for plasma density measurements  

SciTech Connect (OSTI)

A dispersion interferometer based on the second-harmonic generation of a carbon dioxide laser in orientation-patterned gallium arsenide has been developed for measuring electron density in plasmas. The interferometer includes two nonlinear optical crystals placed on opposite sides of the plasma. This instrument has been used to measure electron line densities in a pulsed radio-frequency generated argon plasma. A simple phase-extraction technique based on combining measurements from two successive pulses of the plasma has been used. The noise-equivalent line density was measured to be 1.7 10{sup 17} m{sup ?2} in a detection bandwidth of 950 kHz. One of the orientation-patterned crystals produced 13 mW of peak power at the second-harmonic wavelength from a carbon dioxide laser with 13 W of peak power. Two crystals arranged sequentially produced 58 mW of peak power at the second-harmonic wavelength from a carbon dioxide laser with 37 W of peak power.

Bamford, D. J.; Cummings, E. A.; Panasenko, D. [Physical Sciences Inc., 6652 Owens Drive, Pleasanton, California 94588 (United States)] [Physical Sciences Inc., 6652 Owens Drive, Pleasanton, California 94588 (United States); Fenner, D. B.; Hensley, J. M. [Physical Sciences Inc., 20 New England Business Center, Andover, Massachusetts 01810 (United States)] [Physical Sciences Inc., 20 New England Business Center, Andover, Massachusetts 01810 (United States); Boivin, R. L.; Carlstrom, T. N.; Van Zeeland, M. A. [General Atomics, P.O. Box 85608, San Diego, California 92186 (United States)] [General Atomics, P.O. Box 85608, San Diego, California 92186 (United States)

2013-09-15T23:59:59.000Z

228

Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 6001000Hz  

Science Journals Connector (OSTI)

A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical origin. This background is a target for the current generation of ground-based detectors. In this article we present the first joint search for a stochastic background using data from the LIGO and Virgo interferometers. In a frequency band of 6001000Hz, we obtained a 95% upper limit on the amplitude of ?GW(f)=?3(f/900??Hz)3, of ?3<0.32, assuming a value of the Hubble parameter of h100=0.71. These new limits are a factor of seven better than the previous best in this frequency band.

J. Abadie et al. (LIGO Scientific Collaboration; Virgo Collaboration)

2012-06-04T23:59:59.000Z

229

Atomic population distribution in the output ports of cold-atom interferometers with optical splitting and recombination  

SciTech Connect (OSTI)

Cold-atom interferometers with optical splitting and recombination use off-resonant laser beams to split a cloud of Bose-Einstein condensate (BEC) into two clouds that travel along different paths and are then recombined again using optical beams. After the recombination, the BEC in general populates both the cloud at rest and the moving clouds. Measuring a relative number of atoms in each of these clouds yields information about the relative phase shift accumulated by the atoms in the two moving clouds during the interferometric cycle. We derive the expression for the probability of finding any given number of atoms in each of the clouds, discuss features of the probability density distribution, analyze its dependence on the relative accumulated phase shift as a function of the strength of the interatomic interactions, and compare our results with experiment.

Ilo-Okeke, Ebubechukwu O.; Zozulya, Alex A. [Department of Physics, Worcester Polytechnic Institute, 100 Institute Road, Worcester, Massachusetts 01609 (United States)

2010-11-15T23:59:59.000Z

230

Young-Type Experiment Using a Single-Electron Source and an Independent Atomic-Size Two-Center Interferometer  

Science Journals Connector (OSTI)

Evidence is given for Young-type interferences caused by a single electron acting on a given double-center scatterer analogous to an atomic-size double-slit system. The electron is provided by autoionization of a doubly excited He atom following the capture of the electrons of H2 by a He2+ incoming ion. The autoionizing projectile is a single-electron source, independent of the interferometer provided by the two H+ centers of the fully ionized H2 molecule. This experiment resembles the famous thought experiment imagined by Feynman in 1963, in which the quantum nature of the electron is illustrated from a Young-like double-slit experiment. Well-defined oscillations are visible in the angular distribution of the scattered electrons, showing that each electron interferes with itself.

J.-Y. Chesnel; A. Hajaji; R. O. Barrachina; F. Frmont

2007-03-08T23:59:59.000Z

231

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analysis of the AERI/LBLRTM QME Analysis of the AERI/LBLRTM QME D. C. Tobin, D. D. Turner, H. E. Revercomb, and R. O. Knuteson University of Wisconsin-Madison Madison Wisconsin S. A. Clough, and K. Cady-Pereira Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts Introduction A Quality Measurement Experiment (QME) comparing clear-sky downwelling longwave radiance at the surface from observations and model calculations has been performed by the Atmospheric Radiation Measurement (ARM) Program for many years (e.g., Brown et al. 1995; Clough et al. 1996). This QME has been used to (1) validate and improve absorption models and spectral line parameters used within the Line-by-Line Radiative Transfer Model (LBLRTM), (2) assess the ability to define the atmospheric

232

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

High Latitude Cloud Microphysical Properties from FTIR Data High Latitude Cloud Microphysical Properties from FTIR Data Lubin, D., Scripps Institution of Oceanography Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The ARM AERI instruments record downwelling radiance spectra with sufficient radiometric calibration to enable the retrieval of important cloud microphysical properties. This poster will describe how radiative transfer simulations that include cloud thermodynamic phase (liquid water, ice, mixed phase) can be utilized with Fourier Transform Infrared (FTIR) spectroradiometer data. The presence of the ice phase in cloud alters the slope of the brightness temperature spectrum between 800 - 1200 inverse centimeters, such that ice can often be detected. The AERI near infrared channel also may have potential for cloud phase as discrimination.

233

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM Science Applications of AERI Measurements ARM Science Applications of AERI Measurements Submitter: Smith, W. L., NASA - Langley Research Center Area of Research: Radiation Processes Working Group(s): Cloud Modeling Journal Reference: DeSlover, D. H. 1996. Analysis of Visible and Infrared Cirrus Cloud Optical Properties Using High Spectral Resolution Remote Sensing, M.S. Thesis, University of Wisconsin - Madison. Ho, S.-P. 1997. Atmospheric Profiles From Simultaneous Observations of Upwelling and Downwelling Spectral Radiance, Ph.D. Thesis, University of Wisconsin - Madison. Knuteson, R. O., F. A. Best, H. B. Howell, P. Minnett, H. E. Revercomb, W. L. Smith. 1997. "High Spectral Resolution Infrared Observations at the Ocean-Atmosphere Interface in the Tropical Western Pacific using a Marine

234

A Fast Gridded Method for the Estimation of the Power Spectrum of the CMB from Interferometer Data with Application to the Cosmic Background Imager  

E-Print Network [OSTI]

We describe an algorithm for the extraction of the angular power spectrum of an intensity field, such as the cosmic microwave background (CMB), from interferometer data. This new method, based on the gridding of interferometer visibilities in the aperture plane followed by a maximum likelihood solution for bandpowers, is much faster than direct likelihood analysis of the visibilities, and deals with foreground radio sources, multiple pointings, and differencing. The gridded aperture-plane estimators are also used to construct Wiener-filtered images using the signal and noise covariance matrices used in the likelihood analysis. Results are shown for simulated data. The method has been used to determine the power spectrum of the cosmic microwave background from observations with the Cosmic Background Imager, and the results are given in companion papers.

S. T. Myers; C. R. Contaldi; J. R. Bond; U. -L. Pen; D. Pogosyan; S. Prunet; J. L. Sievers; B. S. Mason; T. J. Pearson; A. C. S. Readhead; M. C. Shepherd

2002-05-23T23:59:59.000Z

235

Design of far-infrared three-wave polarimeter-interferometer system for the J-TEXT tokamak  

SciTech Connect (OSTI)

A multichannel three-wave far-infrared polarimeter-interferometer will be constructed on the J-TEXT tokamak (R=1.05 m, a=0.27 m, B{sub T}{<=}3 T, and I{sub P}{<=}350 kA) for current density profile and electron density profile measurements. The system will adopt the three-wave polarimeter configuration which was first introduced on RTP. Three 432.5 {mu}m HCOOH lasers pumped by three CO{sub 2} lasers separately will be adopted, which could generate high output power, nearly 50 mW at each cavity. Two of them will be counter-rotating circularly polarized to probe the Faraday angle, while the third laser will be used as a local oscillator to get the phase shift caused by electron density. Excellent port access (600x76 mm{sup 2}) and high laser power would promise a profile measurement across the whole plasma section with good signal quality. A high-speed digital phase comparator with a few ({approx}2) {mu}s temporal resolution will be developed, so that fast changes of current or density profile could be measured. Six channels will be installed in the first stage.

Chen, J.; Gao, L.; Zhuang, G.; Wang, Z. J. [Institute of Nuclear Fusion and Plasma Physics, College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China and Key Laboratory of Fusion and Advanced Electromagnetic Technology, Ministry of Education, Wuhan 430074 (China); Gentle, K. W. [Institute of Fusion Studies, University of Texas at Austin, Texas 78712 (United States)

2010-10-15T23:59:59.000Z

236

Orbital parameters, masses and distance to Beta Centauri determined with the Sydney University Stellar Interferometer and high resolution spectroscopy  

E-Print Network [OSTI]

The bright southern binary star beta Centauri (HR 5267) has been observed with the Sydney University Stellar Interferometer (SUSI) and spectroscopically with the ESO CAT and Swiss Euler telescopes at La Silla. The interferometric observations have confirmed the binary nature of the primary component and have enabled the determination of the orbital parameters of the system. At the observing wavelength of 442 nm the two components of the binary system have a magnitude difference of 0.15. The combination of interferometric and spectroscopic data gives the following results: orbital period 357 days, semi-major axis 25.30 mas, inclination 67.4 degrees, eccentricity 0.821, distance 102.3 pc, primary and secondary masses M1 = M2 = 9.1 solar masses and absolute visual magnitudes of the primary and secondary M1V = -3.85 and M2V = -3.70. The high accuracy of the results offers a fruitful starting point for future asteroseismic modelling of the pulsating binary components.

Davis, J; Seneta, E B; Tango, W J; Booth, A J; O'Byrne, J W; Thorvaldson, E D; Ausseloos, M; Aerts, C; Uytterhoeven, K

2004-01-01T23:59:59.000Z

237

Zenith Radiance Retrieval of Cloud Properties  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

retrievals of cloud properties retrievals of cloud properties from the AMF/COPS campaign Preliminary retrievals of cloud properties from the AMF/COPS campaign Christine Chiu, UMBC/JCET Alexander Marshak, GSFC Yuri Knyazikhin, Boston University Warren Wiscombe, GSFC Christine Chiu, UMBC/JCET Alexander Marshak, GSFC Yuri Knyazikhin, Boston University Warren Wiscombe, GSFC The cloud optical properties of interest are: The cloud optical properties of interest are: * Cloud optical depth τ - the great unknown * Radiative cloud fraction * Cloud effective drop size, r eff * Cloud optical depth τ - the great unknown * Radiative cloud fraction * Cloud effective drop size, r eff τ = 3 2 LWP r eff r eff in μm, LWP in g/m 2 The 2-ch narrow-field-of-view radiometer (2NFOV) The 2-ch narrow-field-of-view radiometer

238

Modelling TOVS radiances of synoptic systems  

E-Print Network [OSTI]

results. Experiment compared brightness ~tures of standard soundings run through the RII4 to the same soundings run through the RII4 after the lowest two layers (65 and 66) were artificially set to zero . . . . . . . . . . . . . . . . . . . . . 27 5 5... RII4 "no moisture" experiment results. Experiment cxxnpared brightness ~tures of a sounding run ~ the RIM to the same ~sxling run through the RII4 after all relative humi- dity values had been set to 0. 1 percent ~ , . . . . . ~ ~ . . . . . . 28 6...

Coe, Thomas Eddy

2012-06-07T23:59:59.000Z

239

ARM - Instrument - assist  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govInstrumentsassist govInstrumentsassist Documentation ASSIST : Instrument Mentor Monthly Summary (IMMS) reports ASSIST : Data Quality Assessment (DQA) reports ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Instrument : Atmospheric Sounder Spectrometer for Infrared Spectral Technology (ASSIST) Instrument Categories Radiometric The Atmospheric Sounder Spectrometer for Infrared Spectral Technology (ASSIST), like the AERI, measures infrared spectral zenith radiance at high spectral resolution. Output Datastreams assistch1 : Atmospheric Sounder Spectrometer for Infrared Spectral Technology (ASSIST): channel 1 data assistch2 : Atmospheric Sounder Spectrometer for Infrared Spectral Technology (ASSIST): channel 2 data

240

Relating gravitational wave constraints from primordial nucleosynthesis, pulsar timing, laser interferometers, and the CMB: Implications for the early universe  

Science Journals Connector (OSTI)

We derive a general equation relating the gravitational-wave observables r and ?0gw(f); or the observables ?0gw(f1) and ?0gw(f2). Here, r is the so-called tensor-to-scalar ratio, which is constrained by cosmic-microwave-background experiments; and ?0gw(f) is the energy spectrum of primordial gravitational waves, which is constrained, e.g., by pulsar-timing measurements, laser-interferometer experiments, and the standard big bang nucleosynthesis bound. Differentiating this equation yields a new expression for the tilt dln??0gw(f)/dln?f of the present-day gravitational-wave spectrum. The relationship between r and ?0gw(f) depends sensitively on the uncertain physics of the early universe, and we show that this uncertainty may be encapsulated (in a model-independent way) by two quantities: w^(f) and n^t(f), where n^t(f) is a certain logarithmic average over nt(k) (the primordial tensor spectral index); and w^(f) is a certain logarithmic average over w(a) (the effective equation-of-state parameter in the early universe, after horizon re-entry). Here, the effective equation-of-state parameter w(a) is a combination of the ordinary equation-of-state parameter w(a) and the bulk viscosity ?(a). Thus, by comparing observational constraints on r and ?0gw(f), one obtains (remarkably tight) constraints in the {w^(f),n^t(f)} plane. In particular, this is the best way to constrain (or detect) the presence of a stiff energy component (with w>1/3) in the early universe, prior to big bang nucleosynthesis. (The discovery of such a component would be no more surprising than the discovery of a tiny cosmological constant at late times!) Finally, although most of our analysis does not assume inflation, we point out that if cosmic-microwave-background experiments detect a nonzero value for r, then we will immediately obtain (as a free by-product) a new upper bound w^?0.55 on the logarithmically averaged effective equation-of-state parameter during the primordial dark age between the end of inflation and the start of big bang nucleosynthesis.

Latham A. Boyle and Alessandra Buonanno

2008-08-18T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

A membrane interferometer  

Science Journals Connector (OSTI)

...bilayer membranes from lipid monolayers. A critique . Biophys J 16 : 481 489 . Acknowledgments We thank Profs. Nick Melosh, Merritt Maduke, and Stephen White for useful insights and suggestions. The Cy5-DNA-lipid conjugate was synthesized...

Prasad V. Ganesan; Steven G. Boxer

2009-01-01T23:59:59.000Z

242

A membrane interferometer  

Science Journals Connector (OSTI)

...effects show more complicated, history-dependent behavior that merits further exploration. A range of experimental variations or improvements could also be considered...Biophys J 16 : 481 489 . Acknowledgments We thank Profs. Nick Melosh, Merritt Maduke, and Stephen White for useful insights...

Prasad V. Ganesan; Steven G. Boxer

2009-01-01T23:59:59.000Z

243

White light velocity interferometer  

DOE Patents [OSTI]

The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the first time, powerful, compact or inexpensive sources can be used for remote target velocimetry. These include flash and arc lamps, light from detonations, pulsed lasers, chirped frequency lasers, and lasers operating simultaneously in several wavelengths. The technique is demonstrated with white light from an incandescent source to measure a target moving at 16 m/s.

Erskine, David J. (Oakland, CA)

1997-01-01T23:59:59.000Z

244

White light velocity interferometer  

DOE Patents [OSTI]

The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the first time, powerful, compact or inexpensive sources can be used for remote target velocimetry. These include flash and arc lamps, light from detonations, pulsed lasers, chirped frequency lasers, and lasers operating simultaneously in several wavelengths. The technique is demonstrated with white light from an incandescent source to measure a target moving at 16 m/s. 41 figs.

Erskine, D.J.

1997-06-24T23:59:59.000Z

245

White light velocity interferometer  

DOE Patents [OSTI]

The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the first time, powerful, compact or inexpensive sources can be used for remote target velocimetry. These include flash and arc lamps, light from detonations, pulsed lasers, chirped frequency lasers, and lasers operating simultaneously in several wavelengths. The technique is demonstrated with white light from an incandescent source to measure a target moving at 16 m/s.

Erskine, David J. (Oakland, CA)

1999-01-01T23:59:59.000Z

246

White light velocity interferometer  

DOE Patents [OSTI]

The invention is a technique that allows the use of broadband and incoherent illumination. Although denoted white light velocimetry, this principle can be applied to any wave phenomenon. For the first time, powerful, compact or inexpensive sources can be used for remote target velocimetry. These include flash and arc lamps, light from detonations, pulsed lasers, chirped frequency lasers, and lasers operating simultaneously in several wavelengths. The technique is demonstrated with white light from an incandescent source to measure a target moving at 16 m/s. 41 figs.

Erskine, D.J.

1999-06-08T23:59:59.000Z

247

Tobin-DC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Calculated Downwelling Longwave Calculated Downwelling Longwave Spectral Radiances at the SHEBA Ice Station: Prelude to an Arctic AERI/LBLRTM QME D. C. Tobin, R. O. Knuteson, and H. E. Revercomb Cooperative Institute for Meteorological Satellite Studies Space, Science, and Engineering Center University of Wisconsin Madison, Wisconsin Introduction We present comparisons of clear-sky observed and calculated downwelling radiances from the year-long Surface Heat Budget of the Arctic Ocean (SHEBA) experiment. These and expected similar compari- sons from the Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) site in Barrow, Alaska, are useful for assessing the accuracy of clear-sky forward model issues, particularly the far-infrared air-broadened water vapor continuum and the temperature dependence of the 8 µm to 12 µm

248

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Retrieving Aerosols from the Atmospheric Emitted Retrieving Aerosols from the Atmospheric Emitted Radiance Interferometer: Can it be Done? L. Moy, H.E. Revercomb, and R.O. Knuteson Cooperative Institute for Meteorological Satellite Studies (CIMSS) Madison, Wisconsin D.D. Turner and E. Kassianov Pacific Northwest National Laboratory Richland, Washington The Atmospheric Emitted Radiance Interferometer observes downwelling infrared radiance from 3-19 μm that may enable better retrievals of aerosol optical and physical properties. Theoretical study suggests that the Atmospheric Emitted Radiance Interferometer's infrared aerosol signal is strong enough to overcome instrument noise constraints and uncertainties in the water vapor, especially in the 3-4 μm band where scattering dominates the observed signal during the daytime. Unlike other aerosol

249

NAVY PRECISION OPTICAL INTERFEROMETER OBSERVATIONS OF THE EXOPLANET HOST {kappa} CORONAE BOREALIS AND THEIR IMPLICATIONS FOR THE STAR'S AND PLANET'S MASSES AND AGES  

SciTech Connect (OSTI)

We used the Navy Precision Optical Interferometer to measure the limb-darkened angular diameter of the exoplanet host star {kappa} CrB and obtained a value of 1.543 {+-} 0.009 mas. We calculated its physical radius (5.06 {+-} 0.04 R{sub Sun }) and used photometric measurements from the literature with our diameter to determine {kappa} CrB's effective temperature (4788 {+-} 17 K) and luminosity (12.13 {+-} 0.09 L{sub Sun }). We then placed the star on an Hertzsprung-Russell diagram to ascertain the star's age (3.42{sup +0.32}{sub -0.25} Gyr) and mass (1.47 {+-} 0.04 M{sub Sun }) using a metallicity of [Fe/H] = +0.15. With this mass, we calculated the system's mass function with the orbital elements from a variety of sources, which produced a range of planetary masses: m{sub p}sin i = 1.61-1.88 M{sub Jup}. We also updated the extent of the habitable zone for the system using our new temperature.

Baines, Ellyn K.; Armstrong, J. Thomas [Remote Sensing Division, Naval Research Laboratory, 4555 Overlook Avenue SW, Washington, DC 20375 (United States); Van Belle, Gerard T., E-mail: ellyn.baines@nrl.navy.mil [Lowell Observatory, Flagstaff, AZ 86001 (United States)

2013-07-01T23:59:59.000Z

250

Direct Use of Satellite Sounding Radiances in Numerical Weather Prediction  

Science Journals Connector (OSTI)

Since 1978, operational satellite soundings of the atmospheres temperature and humidity structure have been provided by the TIROS Operational Vertical Sounder (TONS) on the TIROS-N/NOAA series of polar orbiti...

J. R. Eyre; E. Andersson; A. P. McNally

1993-01-01T23:59:59.000Z

251

Instrument Development H. E. Revercomb, F. A. Best, R. G. Dedecker, T. P. Dirkx,  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

H. E. Revercomb, F. A. Best, R. G. Dedecker, T. P. Dirkx, H. E. Revercomb, F. A. Best, R. G. Dedecker, T. P. Dirkx, R. A. Herbsleb, R. O. Knuteson, J. F. Short, and W. L. Smith University of Wisconsin -Madison Space Science and Engineering Center Madison, WI 53706 Ground-based Folurier Transform infrared (FTIR) instru- ments are being produced at the University of Wisconsin (UW) and the Unliversity of Denver (UD) for the Atmo- spheric Radiation Measurement (ARM) Program's Cloud and Radiation Te:stbed (CART) sites as part of a joint Instrument Development Program (lOP). The three instru- ment types under development are summarized in Table 1 . For each ARM site, the 1 cm-1 resolution Atmospheric Emitted Radiance ilnterferometer (AERI) is expected to be operated both at the central site and at four extended boundary location~; to allow its use for radiometric studies

252

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Improving the Treatment of Radiation in Climate Models Improving the Treatment of Radiation in Climate Models Download a printable PDF Submitter: Delamere, J. S., Tech-X Corporation Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle, Cloud Life Cycle Journal Reference: Delamere JS, SA Clough, VH Payne, EJ Mlawer, DD Turner, and RR Gamache. 2010. "A far-infrared radiative closure study in the Arctic: Application to water vapor." Journal of Geophysical Research - Atmospheres, 115, D17106, 10.1029/2009JD012968. The mean AERI-ER radiances for a select set of cloud-free cases at NSA in 2007 are presented in the top panel. The bottom panel presents mean spectral differences between the measurements and model calculations. The red line demonstrates the differences when using the pre-RHUBC version of

253

Bench-Scale Cross Flow Filtration of  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

6.1 6.1 Retrieving Temperature and Moisture Profiles from AERI Radiance Observations: AERIPROF Value-Added Product Technical Description Revision 1 W.F. Feltz D.D. Turner H.B. Howell W.L. Smith R.O. Knuteson H.M. Woolf J. Comstock C. Sivaraman R. Mahon T.Halter April 2007 Work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed,

254

ARM - Publications: Science Team Meeting Documents: Validation of infrared  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Validation of infrared cloud radiative transfer simulations and spectral Validation of infrared cloud radiative transfer simulations and spectral cloud properties retrievals using S-HIS, AERI and HSRL measurements from M-PACE Holz, Robert University of Wisconsin, CIMMS DeSlover, Daniel University of Wisconsin Revercomb, Henry University Of Wisconsin-Madison Tobin, David University of Wisconsin-Madison Knuteson, Robert University Of Wisconsin Turner, David Pacific Northwest National Laboratory Eloranta, Edwin University of Wisconsin As part of the Mixed-Phase Arctic Cloud Experiment (M-PACE) the Scanning High spectral resolution Interferometer Sounder (S-HIS) flew on the Proteus high altitude aircraft with the ARM-UAV instrumentation. The University of North Dakota Cessna Citation capable of cloud situ measurements was coordinated with the Proteus to obtain coincident down looking and situ

255

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM Program Achieves Milestone in Global Cloud Properties Research ARM Program Achieves Milestone in Global Cloud Properties Research Submitter: Revercomb, H. E., University of Wisconsin, Madison Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Knuteson, R.O., Best, F.A., Dedecker, R.G., Feltz, W.F., Revercomb, H.E., and Tobin, D.C., 2004: "10 Years of AERI Data from the DOE ARM Southern Great Plains Site," In Proceedings from the Fourteenth ARM Science Team Meeting, U.S. Department of Energy,Washington, D.C. Figure 1 Figure 2 From the unassuming farmlands of north-central Oklahoma comes a milestone for the global climate research community. March 2004 marked the 10-year anniversary for an instrument that now holds the prestigious distinction of providing the longest set of continuous atmospheric interferometer data

256

Development of a Strontium-87 Ion Interferometer.  

E-Print Network [OSTI]

??I present the construction of a low-velocity intense source (LVIS) of laser-cooled neutral strontium using permanent ring magnets. The LVIS consists of a magneto-optical trap (more)

Erickson, Christopher Joseph

2011-01-01T23:59:59.000Z

257

Superfluid 4He interferometers: construction and experiments  

E-Print Network [OSTI]

in a weaker developer such as isopropyl alcohol (IPA). Weuse a 1:3 solution of MIBK:IPA for high contrast, lowTHE DISPLACEMENT SENSOR (IPA) are also kept ready. Alcohols

Joshi, Aditya Ajit

2013-01-01T23:59:59.000Z

258

Imaging circumstellar environments with a nulling interferometer  

Science Journals Connector (OSTI)

... small adjustments to correct for flexure. Image detection was made with the Rockwell (now Boeing) 128 128 arsenic-doped silicon BIB array of the Mid-infrared Array Camera, ...

Philip M. Hinz; J. Roger P. Angel; William F. Hoffmann; Donald W. McCarthy; Patrick C. McGuire; Matt Cheselka; Joseph L. Hora; Neville J. Woolf

1998-09-17T23:59:59.000Z

259

Superfluid 4He interferometers: construction and experiments  

E-Print Network [OSTI]

in a superfluid josephson junction. Phys. Rev. Lett. , 106:boundary josephson junctions. Applied Superconductivity,across an array of josephson junctions in superfluid 4 He

Joshi, Aditya Ajit

2013-01-01T23:59:59.000Z

260

What and how the Michelson interferometer measures  

E-Print Network [OSTI]

Proposed by Maxwell in 1879 detector of aether seems, at a superficial glance, a simple device. For example, Michelson in 1881 thought that he built an instrument that (when you turn it in the horizontal plane) will measure in vacuum (refractive index n=1) the harmonic shift of the interference fringe. In reality the case is much more involved. Not at once it was understood (the misunderstanding lasted about 90 years) that the shift of interference fringe occurs only when the carriers of light contain particles, i.e. have n>1. In 1968-1975 I have demonstrated experimentally that during the pumping of the gas from the zones where the light propagates, i.e. with decreasing the number of particles of the light's carrier, along with the reduction of noise disturbances always necessarily vanishes the harmonic shift of the interference fringe. As soon as the correlation of the observability of the fringe shift with the concentration of particles in the light's carrier has been taken into account, I was able to reliably measure the speed of absolute motion of the Earth as a few hundred km/s. In the sixth version I corrected the slip in formula (21). There is suggested for experimenters the advice how to diminish below the measurable level of the sought-for signal the harmful influence of the noise and false interferences, and for interpreters of measurements of non-zero fringe shift the derivation is given of a relativistically invariant formula of the aether wind speed that agrees with the experiments in optical media with 1measuring the horizontal projection of absolute velocity of the Earth at the latitude of Obninsk as 140-480 km/s depending on the time of day and night. This experimental result became possible only owing to that I was able to overcome the above mentioned methodical and interpretational artifacts.

V. V. Demjanov

2010-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Hawat-T  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ASTI-SORTI Comparison ASTI-SORTI Comparison T. M. Hawat, T. M. Stephen, and F. J. Murcray Physics and Astronomy University of Denver Denver, Colorado Abstract The Absolute Solar Transmittance Interferometer (ASTI) determines the absolutely calibrated solar spectral radiance from 1 micron to 5 microns (10000 to 2000 cm -1 ) with a 1 cm -1 spectral resolution. Recently, the Solar Radiance Transmission Interferometer (SORTI) was configured to operate in the near infrared, providing spectra from 750 nm to 2400 nm (13000 to 4000 cm -1 ) with 0.035 cm -1 resolu- tion. Simultaneous ASTI and SORTI observations at the Southern Great Plains (SGP) Atmospheric Radiation Measurement (ARM) program site are compared in the overlap region and ASTI spectra from SGP and other sites are compared to atmospheric model calculations.

262

A generalized algorithm for retrieving cloudy sky skin temperature from satellite thermal infrared radiances  

E-Print Network [OSTI]

A generalized algorithm for retrieving cloudy sky skin temperature from satellite thermal infrared Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta Abstract. A physical algorithm that of Jin [2000]. Two neighboring pixels over the same land cover have a difference in temperature largely

Jin, Menglin

263

Extracting High Temperature Event radiance from satellite images and correcting for saturation using Independent Component Analysis  

E-Print Network [OSTI]

.Barnie@opgc.univ-bpclermont.fr (C. Oppenheimer). http://dx.doi.org/10.1016/j.rse.2014.10.023 0034-4257/ 2014 The Authors. Published by Elsevier Incyon, & Nordberg, 1965; 1979; Harris et al., 1997; al., 2002; Kaufman et al., HTE processes can be explicitly modelled, for instance... including back- ground surface temperature as a free parameter in subpixel thermal unmixing (although this is usually assumed a priori, e.g. Oppenheimer,Glaze, Francis, & Rothery, 1989; Hanel et al., Oppenheimer, 1991), wildfires (e.g. Justice et1...

Barnie, Talfan; Oppenheimer, Clive

2014-12-01T23:59:59.000Z

264

A Comprehensive Theory of Volumetric Radiance Estimation using Photon Points and Beams  

E-Print Network [OSTI]

a camera ray, with the standard photon particle representation used in previous work. Furthermore, we gen map, particle tracing, participating media 1. INTRODUCTION Participating media is responsible for some, rainbows, crepuscular "god" rays, and all I. Sadeghi was funded in part by NSF grant CPA 0701992. W. Jarosz

Meyer, Gary

265

A validation of the Radiance three-phase simulation method for modeling  

E-Print Network [OSTI]

) or 39% of total US primary energy consumption in 2005. The three largest uses of energy in buildings Berkeley National Laboratory Environmental Energy Technologies Division Building Technology and Urban Technologies Program, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory

266

Semianalytic Monte Carlo calculation of reflected and transmitted radiance in a plane parallel atmosphere  

E-Print Network [OSTI]

=T Fig. 1. Pictorial representation of plane parallel atmosphere geometry. is m dr 0 where n =cos 8 n n and m is the albedo for single scattering. The probability of pas- 0 sage from r' to r without further scattering is exp [-(r' ? r)/n ]. n+1... Therefore, the probability of passage through any plane r after n+1 collisions, is a product of these three probabilities. p (r') exp [-(r' ? r)/n ] dr' n+1 n After integrating over all possible values of r' between 0 and for n & 0, an equation...

Moffitt, John Russell

2012-06-07T23:59:59.000Z

267

The Five-Phase Method for Simulating Complex Fenestration with Radiance  

E-Print Network [OSTI]

component to achieve better accuracy of the distribution of direct solar light in a room for complex glazing, the five-phase method handles the direct solar component separately from the sky and inter- reflected solar. Subtract the direct solar contribution (leaving the inter-reflected solar component) 3. Add direct solar

268

Figure legends Figure 1: Normalized radiance spectra of the different experimental color  

E-Print Network [OSTI]

treatment groups. The fluorescent (red) line represents the narrow rearing treatment. The 5500K (green) and 10000K (blue) lines represent the two bulb types used. #12;Figure S4: Behavioral predictive model performance for the broad-spectrum

Carleton, Karen L.

269

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ARM Science Applications of AERI Measurements: 1997 Progress ARM Science Applications of AERI Measurements: 1997 Progress Submitter: Smith, W. L., NASA - Langley Research Center Area of Research: Radiation Processes Working Group(s): Cloud Modeling Journal Reference: N/A Figure 1. Figs. 1a and 1b contain rms differences from 72 radiosondes for AERI retrievals (blue), GOES retrievals (black), and AERI+GOES retrievals (red) for temperature and mixing ratio respectively during the 1997 Water Vapor IOP. A measure of meteorological the variability of the temperature and water vapor is indicated by the green line. Figs. 1c and 1d show the TPW for the same cases from GOES, AERI+GOES, radiosonde, and the ARM SGP CART microwave radiometer and relative percent differences in TPW amounts. Figure 2. Four consecutive radiosonde, GOES, and AERI+GOES comparisons from

270

E-Print Network 3.0 - al comienzo del Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

si comienza a observar objetos cerca ... Source: Canarias, Instituto de Astrofisica de (IAC) Collection: Physics 4 TURISME I TRANSPORT AERI (4 crdits) Summary: d'abril de 2011...

271

Report of the Alternative Sustainable Energy  

E-Print Network [OSTI]

Report of the Alternative Sustainable Energy Research Initiative 2009 Prof. David Cahen Scientific Director #12;Alternative and Sustainable Energy Research Initiative (AERI) Weizmann Institute of Science 1 thousands of strains of algae, analyzing their Alternative and Sustainable Energy Research Initiative (AERI

Maoz, Shahar

272

Clear Skies S. A. Clough Atmospheric and Environmental Research, Inc.  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

S. A. Clough S. A. Clough Atmospheric and Environmental Research, Inc. Cambridge, MA 02139 The objective of this research effort is to develop radiative transfer models that are consistent with Atmospheric Radiation Measurement (ARM) Program spectral radiance measurements for clear and cloudy atmospheres. Our approach is to develop the model physics and related databases with a line-by-line model in the context of available spectral radiance measurements. The line-by- line mode! then functions as an intermediate standard to both develop and validate rapid radiative transfer models appropriate to GCM applications. consistent with downlooking data taken with the high spectral resolution interferometer sounder (HIS) (Smith et al. 1983) from 20 km and with simultaneous data taken

273

A high-flux BEC source for mobile atom interferometers  

E-Print Network [OSTI]

Quantum sensors based on coherent matter-waves are precise measurement devices whose ultimate accuracy is achieved with Bose-Einstein condensates (BEC) in extended free fall. This is ideally realized in microgravity environments such as drop towers, ballistic rockets and space platforms. However, the transition from lab-based BEC machines to robust and mobile sources with comparable performance is a technological challenge. Here we report on the realization of a miniaturized setup, generating a flux of $4 \\times 10^5$ quantum degenerate $^{87}$Rb atoms every 1.6 s. Ensembles of $1 \\times 10^5$ atoms can be produced at a 1 Hz rate. This is achieved by loading a cold atomic beam directly into a multi-layer atom chip that is designed for efficient transfer from laser-cooled to magnetically trapped clouds. The attained flux of degenerate atoms is on par with current lab-based experiments while offering significantly higher repetition rates. The compact and robust design allows for mobile operation in a variety of...

Rudolph, Jan; Grzeschik, Christoph; Sternke, Tammo; Grote, Alexander; Popp, Manuel; Becker, Dennis; Mntinga, Hauke; Ahlers, Holger; Peters, Achim; Lmmerzahl, Claus; Sengstock, Klaus; Gaaloul, Naceur; Ertmer, Wolfgang; Rasel, Ernst M

2015-01-01T23:59:59.000Z

274

A high-flux BEC source for mobile atom interferometers  

E-Print Network [OSTI]

Quantum sensors based on coherent matter-waves are precise measurement devices whose ultimate accuracy is achieved with Bose-Einstein condensates (BEC) in extended free fall. This is ideally realized in microgravity environments such as drop towers, ballistic rockets and space platforms. However, the transition from lab-based BEC machines to robust and mobile sources with comparable performance is a technological challenge. Here we report on the realization of a miniaturized setup, generating a flux of $4 \\times 10^5$ quantum degenerate $^{87}$Rb atoms every 1.6 s. Ensembles of $1 \\times 10^5$ atoms can be produced at a 1 Hz rate. This is achieved by loading a cold atomic beam directly into a multi-layer atom chip that is designed for efficient transfer from laser-cooled to magnetically trapped clouds. The attained flux of degenerate atoms is on par with current lab-based experiments while offering significantly higher repetition rates. The compact and robust design allows for mobile operation in a variety of demanding environments and paves the way for portable high-precision quantum sensors.

Jan Rudolph; Waldemar Herr; Christoph Grzeschik; Tammo Sternke; Alexander Grote; Manuel Popp; Dennis Becker; Hauke Mntinga; Holger Ahlers; Achim Peters; Claus Lmmerzahl; Klaus Sengstock; Naceur Gaaloul; Wolfgang Ertmer; Ernst M. Rasel

2015-01-02T23:59:59.000Z

275

Improved analysis of plasmasphere motion using the VLA radio interferometer  

E-Print Network [OSTI]

the electrical phase advance due to the 307.5-MHz signal passing through the plasma- sphere/ionosphere system. Jacobson Space and Atmospheric Sciences Group, Mail Stop D466, Los Alamos National Laboratory, Los Alamos 3:6 2 1014 electrons mÿ2 of TEC for 307.5-MHz radio waves) as it propagates across the VLA

Paris-Sud XI, Université de

276

Fundamental phenomena of quantum mechanics explored with neutron interferometers  

E-Print Network [OSTI]

Ongoing fascination with quantum mechanics keeps driving the development of the wide field of quantum-optics, including its neutron-optics branch. Application of neutron-optical methods and, especially, neutron interferometry and polarimetry has a long-standing tradition for experimental investigations of fundamental quantum phenomena. We give an overview of related experimental efforts made in recent years.

J. Klepp; S. Sponar; Y. Hasegawa

2014-07-09T23:59:59.000Z

277

Coherent Time-Delayed Atom-Light Interferometer  

E-Print Network [OSTI]

We present experimental observations of interference between an atomic spin coherence and an optical field in a $\\Lambda$-type gradient echo memory. The interference is mediated by a strong classical field that couples a weak probe field to the atomic spin coherence through a resonant Raman transition. Interference can be observed between a prepared spin coherence and another propagating optical field, or between multiple $\\Lambda$ transitions driving a single spin coherence. In principle, the interference in each scheme can yield a near unity visibility and could be used as a coherent all-optical switch.

Campbell, G; Sparkes, B M; Lam, P K; Buchler, B C

2011-01-01T23:59:59.000Z

278

Collaborative Randomized Beamforming for Phased Array Radio Interferometers  

E-Print Network [OSTI]

The Square Kilometre Array (SKA) will form the largest radio telescope ever built and such a huge instrument in the desert poses enormous engineering and logistic challenges. Algorithmic and architectural breakthroughs are needed. Data is collected and processed in groups of antennas before transport for central processing. This processing includes beamforming, primarily so as to reduce the amount of data sent. The principal existing technique points to a region of interest independently of the sky model and how the other stations beamform. We propose a new collaborative beamforming algorithm in order to maximize information captured at the stations (thus reducing the amount of data transported). The method increases the diversity in measurements through randomized beam- forming. We demonstrate through numerical simulation the effectiveness of the method. In particular, we show that randomized beamforming can achieve the same image quality while producing 40% less data when compared to the prevailing method m...

Ocal, Orhan; Cherubini, Giovanni; Kazemi, Sanaz

2014-01-01T23:59:59.000Z

279

Microsoft Word - Tech Specs Interferometer.v.0.docx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

organisation conducting these activities should have an ITER approved QA Program or an ISO 9001 accredited quality system. The general requirements are detailed in ITER document...

280

Stability comparison of two absolute gravimeters: optical versus atomic interferometers  

E-Print Network [OSTI]

We report the direct comparison between the stabilities of two mobile absolute gravimeters of different technology: the LNE-SYRTE Cold Atom Gravimeter and FG5X\\#216 of the Universit\\'e du Luxembourg. These instruments rely on two different principles of operation: atomic and optical interferometry. The comparison took place in the Walferdange Underground Laboratory for Geodynamics in Luxembourg, at the beginning of the last International Comparison of Absolute Gravimeters, ICAG-2013. We analyse a 2h10 duration common measurement, and find that the CAG shows better immunity with respect to changes in the level of vibration noise, as well as a slightly better short term stability.

Gillot, Pierre; Landragin, Arnaud; Santos, Franck Pereira Dos; Merlet, Sbastien

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Web wanderings: Java, applets and a virtual radio interferometer  

Science Journals Connector (OSTI)

......satisfying approach, as it allows, and positively encourages, experimentation with different arrays of telescopes. Users can pro- ceed at their own pace, to discover how various configurations affect the images received, gaining famil- iarity with the method......

Michael Sandell

1998-06-01T23:59:59.000Z

282

A simple pendulum laser interferometer for determining the gravitational constant  

Science Journals Connector (OSTI)

...separations to a gauge block stack. Foam insulation was attached to...were sealed from draughts and insulated. To further reduce the temperature...mass stack half-way up. An insulated compartment was constructed...defined by stops; a drive cable connected to a stepper motor...

2014-01-01T23:59:59.000Z

283

Voltage sensor with fiber Fabry-Perot interferometer  

E-Print Network [OSTI]

with smaller strain constants, a larger voltage must be applied to get a 2x round trip phase shift. Hence, a longer FFPI is needed to get higher resolution. 16 A plate type PZT was selected because it's more convenient to attach to a thermo-electric cooler... in electron-beam evaporation system, they can be spliced to uncoated fibers, which also have cleaved end surfaces. The basic configuration for this Siecor Model M 67 fusion splicer is shown in fig. 12. A electric arc is initiated between the electrodes...

Wann, Been-Huey

1992-01-01T23:59:59.000Z

284

Optimal Light Beams and Mirror Shapes for Future LIGO Interferometers  

E-Print Network [OSTI]

We report the results of a recent search for the lowest value of thermal noise that can be achieved in LIGO by changing the shape of mirrors, while fixing the mirror radius and maintaining a low diffractional loss. The result of this minimization is a beam with thermal noise a factor of 2.32 (in power) lower than previously considered Mesa Beams and a factor of 5.45 (in power) lower than the Gaussian beams employed in the current baseline design. Mirrors that confine these beams have been found to be roughly conical in shape, with an average slope approximately equal to the mirror radius divided by arm length, and with mild corrections varying at the Fresnel scale. Such a mirror system, if built, would impact the sensitivity of LIGO, increasing the event rate of observing gravitational waves in the frequency range of maximum sensitivity roughly by a factor of three compared to an Advanced LIGO using Mesa beams (assuming all other noises remain unchanged). We discuss the resulting beam and mirror properties and study requirements on mirror tilt, displacement and figure error, in order for this beam to be used in LIGO detectors.

Mihai Bondarescu; Oleg Kogan; Yanbei Chen

2008-06-14T23:59:59.000Z

285

Solving the corner-turning problem for large interferometers  

E-Print Network [OSTI]

The so-called corner-turning problem is a major bottleneck for radio telescopes with large numbers of antennas. The problem is essentially that of rapidly transposing a matrix that is too large to store on one single device; ...

Lutomirski, Andrew

286

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Introducing WEB_MADS Introducing WEB_MADS Dedecker, R.G., Quinn, G.M., Garcia, R.K., and Revercomb, H.E., University of Wisconsin-Madison Space Science and Engineering Center Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The Multiple AERI Display System (MADS) is a software package developed to allow remote access to and viewing of the operational AERI data streams produced by remotely operated AERI instruments. The MADS system was developed some years ago and operates on stand alone Personal Computers that run the OS/2 operating system and that acquire remote AERI data via the Internet. WEB-MADS is a Web based prototype version of MADS that allows remote access to the same AERI data and information using any standard Web Browser. As was the case with the original MADS, WEB-MADS provides a means for real

287

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Remote Sensing of Mineral Dust Using AERI Remote Sensing of Mineral Dust Using AERI Download a printable PDF Submitter: Hansell, R. A., University of California, Los Angeles Area of Research: Radiation Processes Working Group(s): Aerosol Journal Reference: Hansell R, KN Liou, SC Ou, SC Tsay, Q Ji, and JS Reid. 2008. "Remote sensing of mineral dust aerosol using AERI during the UAE2: A modeling and sensitivity study." Journal of Geophysical Research - Atmospheres, 113, D18202, doi:10.1029/2008JD010246. BT sensitivity to dust optical depth at 962 cm-1 with markers denoting locations of AERI subbands 1-17 from left to right. (a) Volz compact hexagon model spectra for four optical depths with best fit AERI spectrum. (b) Same as (a) but for a kaolinite/50% calcium carbonate mixturedust model.

288

Development and Application of a Versatile Balloon-Borne DOAS Spectrometer for Skylight Radiance and Atmospheric Trace Gas Profile Measurements.  

E-Print Network [OSTI]

??In the framework of this thesis, a novel balloon-borne DOAS instrument was developed, characterized in the laboratory and employed during 5 stratospheric balloon flights. Its (more)

Weidner, Frank

2005-01-01T23:59:59.000Z

289

Radiative Importance of ThinŽ Liquid Water Clouds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Program Program Accomplishments of the Instantaneous Radiative Flux (IRF) Working Group August 2006 AERI Observations at Southern Great Plains Improve Infrared Radiative Transfer Models Turner et al., JAS, 2004 * AERI observations used to evaluate clear sky IR radiative transfer models * Long-term comparisons have improved - Spectral line database parameters - Water vapor continuum absorption models * Reduced errors in computation of downwelling radiative IR flux by approx 4; current uncertainty is on the order of 1.5 W/m 2 AERI - (Pre-ARM Model) AERI - (Model in 2003) 1 RU = 1 mW / (m 2 sr cm -1 ) Excellent Agreement in Clear Sky Shortwave Radiative Transfer Between Obs and Calcs Shortwave Flux Bias (Solid) Shortwave Flux RMS (Hatched) W m -2 * Comparison of shortwave radiative flux at the surface

290

ARM TR-008  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

every 20 seconds. The AERI data can be used for 1) evaluating line-by-line radiative transport codes, 2) detectingquantifying cloud effects on ground-based measurements of...

291

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Y.A. Pkhalagov A Two-Year Cloud Climatology for the Southern Great Plains Site R.T. Marchand, T.P. Ackerman, and E.E. Clothiaux AERI + GOES Retrievals at the SGP ARM Site: SCM...

292

smith-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

05 ARM Science Applications of AERI Measurements: 1997 Progress W. L. Smith NASA-Langley Research Center Hampton, Virginia W. F. Feltz and D. H. DeSlover University of Wisconsin...

293

Use of the ARM Measurements of Spectral Zenith Radiance for Better Understanding of 3D Cloud-Radiation Processes & Aerosol-Cloud Interaction  

SciTech Connect (OSTI)

This project focuses on cloud-radiation processes in a general three-dimensional cloud situation, with particular emphasis on cloud optical depth and effective particle size. The proposal has two main parts. Part one exploits the large number of new wavelengths offered by the Atmospheric Radiation Measurement (ARM) zenith-pointing ShortWave Spectrometer (SWS), to develop better retrievals not only of cloud optical depth but also of cloud particle size. We also take advantage of the SWS high sampling resolution to study the twilight zone around clouds where strong aerosol-cloud interactions are taking place. Part two involves continuing our cloud optical depth and cloud fraction retrieval research with ARMs 2-channel narrow vield-of-view radiometer and sunphotometer instrument by, first, analyzing its data from the ARM Mobile Facility deployments, and second, making our algorithms part of ARMs operational data processing.

Chiu, Jui-Yuan Christine [University of Reading] [University of Reading

2014-04-10T23:59:59.000Z

294

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 Science Team Meeting 4 Science Team Meeting 1994 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Proceedings of the Fourth Atmospheric Radiation Measurement (ARM) Science Team Meeting DOE CONF-940277, March 1994 Charleston, South Carolina For proper viewing, many of these proceedings should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Abreu, L.W. MODTRAN3: Suitability as a Flux-Divergence Code Acharya, P. MODTRAN3: Suitability as a Flux-Divergence Code Ackerman, S.A. Atmospheric Emitted Radiance Interferometer Data Analysis Methods

295

Femtosecond laser fabrication of directional couplers and Mach-Zehnder interferometers  

E-Print Network [OSTI]

The use of femtosecond lasers for photonic device fabrication in glass has become an active area of research in recent years. Since the first demonstration of laser modification of refractive index in glass, a variety of ...

Gu, Yu, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

296

Results from prototype polarimeter/interferometer on Alcator C-Mod  

E-Print Network [OSTI]

The poloidal field and corresponding toroidal current profiles have been among the most difficult and most important measurements in tokamak fusion research. One method demonstrated to obtain information about these ...

Smith, Kelly (Kelly Robert)

2007-01-01T23:59:59.000Z

297

The Effects and Applications of Erbium Doped Fiber Fabry-Perot Interferometers  

E-Print Network [OSTI]

E mi s s ion 1 4 8 0 - 10 0 10 20 30 40 50 60 1480 1500 1520 1540 1560 1580 1600 1620 W av ele n g t h G ( d B) E mi s s ion 9 8 0 - 20 - 10 0 10 20 30 40 50 60 1480 1500 1520 1540 1560 1580 1600 1620 W av ele n g t h G ( d B) 13 Fig. 9... continued A bsor pt ion 0 10 20 30 40 50 60 70 80 90 1420 1440 1460 1480 1500 1520 1540 1560 1580 1600 1620 W av ele n g t h L o ss ( d B) E mi s s ion & A bsor pt ion 0 10 20 30 40 50 60 70 80 90 1420 1440 1460 1480 1500 1520 1540 1560 1580 1600 1620 W av...

Taylor, Justin K.

2010-07-14T23:59:59.000Z

298

Graphene-based D-shaped fiber multicore mode interferometer for chemical gas sensing  

Science Journals Connector (OSTI)

In this Letter, a graphene-coated D-shaped fiber (GDF) chemical gas sensor is proposed and demonstrated. Taking advantage of both the graphene-induced evanescent field enhancement and...

Wu, Y; Yao, B C; Zhang, A Q; Cao, X L; Wang, Z G; Rao, Y J; Gong, Y; Zhang, W; Chen, Y F; Chiang, K S

2014-01-01T23:59:59.000Z

299

Improvement of the polarized neutron interferometer setup demonstrating violation of a Bell-like inequality  

E-Print Network [OSTI]

For precise measurements with polarized neutrons high efficient spin-manipulation is required. We developed several neutron optical elements suitable for a new sophisticated setup, i.e., DC spin-turners and Larmor-accelerators which diminish thermal disturbances and depolarisation considerably. The gain in performance is exploited demonstrating violation of a Bell-like inequality for a spin-path entangled single-neutron state. The obtained value of S=2.365(13), which is much higher than previous measurements by neutron interferometry, is 28 $\\sigma$ above the limit of S=2 predicted by contextual hidden variable theories. The new setup is more flexible referring to state preparation and analysis, therefore new, more precise measurements can be carried out.

Hermann Geppert; Tobias Denkmayr; Stephan Sponar; Hartmut Lemmel; Yuji Hasegawa

2014-04-14T23:59:59.000Z

300

Graphene enhanced evanescent field in microfiber multimode interferometer for highly sensitive gas sensing  

Science Journals Connector (OSTI)

Graphene based new physics phenomena are leading to a variety of stimulating graphene-based photonic devices. In this study, the enhancement of surface evanescent field by graphene...

Yao, B C; Wu, Y; Zhang, A Q; Rao, Y J; Wang, Z G; Cheng, Y; Gong, Y; Zhang, W L; Chen, Y F; Chiang, K S

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Toward quantum opto-mechanics in a gram-scale suspended mirror interferometer  

E-Print Network [OSTI]

A new generation of interferometric gravitational wave detectors, currently under construction, will closely approach the fundamental quantum limits of measurement, serving as a prominent example of quantum mechanics at ...

Wipf, Christopher (Christopher Conrad)

2013-01-01T23:59:59.000Z

302

Polarization interferometer for measuring the flying height of magnetic readwrite heads  

Science Journals Connector (OSTI)

Traditional optical flying-height testers use only the normal-incidence reflectivity of the interface between the readwrite slider and a glass disk surrogate. We propose a tester that...

de Groot, Peter; Deck, Leslie; Soobitsky, James; Biegen, James

1996-01-01T23:59:59.000Z

303

Research on micro-vibration measurement by a laser diode self-mixing interferometer  

Science Journals Connector (OSTI)

The self-mixing vibration signals are observed in the laser diode when the optical beam is back-scattered into the laser cavity which causes laser output power modulated. Based on these properties, a laser diode self-mixing vibrometer with wide dynamic range is proposed. This current investigation further reports new work to improve the accuracy and range of the measured vibration signals. Numerical simulations and experimental results are given and discussed. The experimental results show that the frequency measurement range can be achieved up to 22kHz with 0.241% maximum relative error while utilizing the reflecting film. For amplitude measurement utilizing the same reflecting film, the error of measurement result is 4.77nm which has approached nanometer order of magnitude.

Yunhe Zhao; Liang Lu; Zhengting Du; Bo Yang; Wenhua Zhang; Jianxi Zhou; Huaqiao Gui; Benli Yu

2013-01-01T23:59:59.000Z

304

Vibration Measurement Using a Novel Fibre-Optic Electronically-Scanned White-Light Interferometer  

Science Journals Connector (OSTI)

Optical interferometry is a widely used technique for the measurement of vibrations of a range of industrial components.1,2 It has a wide dynamic range and a high sensitivity. 2,3 However, these configurations di...

R. H. Marshall; Y. N. Ning; A. W. Palmer

1997-01-01T23:59:59.000Z

305

hal-00283932,version1-1Jun2008 Operating an atom interferometer beyond its linear range  

E-Print Network [OSTI]

associated to the auxiliary measurement of external vibrations, can be operated beyond its linear range vibration isolation, the use of a low noise seismometer for the measurement of ground vibrations allows our of the measurement to large vibration noise is also demonstrated by the ability of our gravimeter to operate during

Paris-Sud XI, Université de

306

Silicon-On-Insulator-Based Photonic-Crystal Mach-Zehnder Interferometers  

E-Print Network [OSTI]

a promising platform for developing novel optoelectronic devices with significantly reduced device size. INTRODUCTION The cost and size reduction of optoelectronic devices in order to facilitate large of compact and high-performance optical and optoelectronic devices due to their unique properties

Chen, Ray

307

Quantitative determination of stress by inversion of speckle interferometer fringe patterns: experimental laboratory tests  

Science Journals Connector (OSTI)

......by the heat of drilling or ongoing time-dependent...general, the largest value of the...monitoring, borehole breakout and...30 min after drilling. Fig. 2b-1...taken 1 min after drilling. There are few...location displayed large and discontinuous...determination from a borehole (Bass 1986......

Douglas R. Schmitt; Mamadou S. Diallo; Frank Weichman

2006-12-01T23:59:59.000Z

308

The Very Large Telescope Interferometer: an update Pierre Haguenauer*a  

E-Print Network [OSTI]

, Casilla 19001, Santiago, Chile; b European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching long tunnel. A system of movable mirrors allows sending the light from each DL to any of the sixteen

Liske, Jochen

309

Double common-path interferometer for flexible optical probe of optical coherence tomography  

E-Print Network [OSTI]

J. Fujimoto, Optical coherence tomography, Science 254(D. E. N. Davies, Optical coherence-domain reflectometry: afiber common-path optical coherence tomography: sensitivity

Park, Jae Seok; Chen, Zhongping; Jeong, Myung Yung; Kim, Chang-Seok

2012-01-01T23:59:59.000Z

310

Vibration Phase Based Ordering of Vibration Patterns Acquired With a Shearing Speckle Interferometer and Pulsed Illumination  

Science Journals Connector (OSTI)

Harmonic vibrations of diffusely reflecting objects can be visualized ... period that is relatively long compared to the vibration period, time average interferograms are obtained,...

Peter A. A. M. Somers; Nandini Bhattacharya

2007-01-01T23:59:59.000Z

311

Angular Dispersion-type Nonscanning Fabry-Perot Interferometer Applied to Ethanol-water Mixture  

Science Journals Connector (OSTI)

The angular dispersion-type non-scanning Fabry-Perot was applied to an ethanol-water mixture in order to investigate its acoustic properties such as the sound velocity and the...

Ko, Jae-Hyeon; Kojima, Seiji

2009-01-01T23:59:59.000Z

312

ARM - Publications: Science Team Meeting Documents: Determination of the  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Determination of the Arctic Indirect Aerosol Effect from AERI and Determination of the Arctic Indirect Aerosol Effect from AERI and Multispectral Radiometer Data Lubin, Dan University of California, San Diego Vogelmann, Andrew Brookhaven National Laboratory We have detected and quantified the aerosol indirect radiative effect in the longwave by identifying the spectral signatures of liquid water clouds having smaller droplet effective droplet radius using AERI. Statistically significant differences in the longwave emission spectra appear between low CN and high CN cases as measured in NOAA CMDL aerosol number concentration data at Barrow, Alaska. An independent verification of this indirect effect detection is provided by downwelling longwave flux measurements from the NSA pyrgeometers, which show consistently larger fluxes in the high CN

313

Energy Solutions Using Wireless Telemetry  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solutions Using Wireless Telemetry Solutions Using Wireless Telemetry Speaker(s): Andy Green Date: June 12, 2001 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Satkartar K. Kinney This talk will address the following: * Introduction to wireless data networks * What are cellular control channels and why do I care? * Telemetry using wireless short packet data * Aeris technologies * Energy applications - Automatic meter reading - HVAV-R monitoring and control - Home gateways and remote thermostat control - Load management and curtailment - Distribution automation - Supply monitoring/management * The future For more information on this topic, you're invited to visit Aeris.Net at: http://www.aeris.net For more information about this seminar, please contact: Satkartar Kinney(510) 495-2365

314

Report of the Alternative Sustainable Energy  

E-Print Network [OSTI]

Report of the Alternative Sustainable Energy Research Initiative 2010 Prof. David Cahen Scientific Director #12;Alternative and sustainable Energy Research Initiative (AERI) Weizmann Institute of Science Designer Cellulosomes 28 SSC2010: Solar Student Conference 2010 30 #12;Alternative and sustainable Energy

Maoz, Shahar

315

Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 6001000 Hz  

E-Print Network [OSTI]

A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical origin. This background is a target for ...

Barsotti, Lisa

316

Control and Acquisition Software for the Visible-Light Fabry-Prot Interferometer at the Big Bear Solar Observatory  

E-Print Network [OSTI]

-Light Imaging Magnetograph (VIM). We describe the software libraries and methods that we use to develop (VIM) and the InfraRed Imaging Magnetograph (IRIM). A detailed description of IRIM is given elsewhere in these proceedings.[2] VIM has two advantages over the DVMG system: (1) it has been designed to work with adaptive

317

Studies of resonantly produced plasmas in the H-1NF heliac using a far-infrared scanning interferometer  

E-Print Network [OSTI]

and a typical minor radius of 0.2 m. The addition of a helical winding to the poloidal field coil allows access at half maximum of 2 cm at the plasma center. Recently, the air turbine grating drive was replaced and signal to noise ratio. We typically choose N 30. A Fourier shifting algorithm is used to correct

Howard, John

318

X-ray grating interferometer for materials-science imaging at a low-coherent wiggler source  

Science Journals Connector (OSTI)

X-ray phase-contrast radiography and tomography enable to increase contrast for weakly absorbing materials. Recently x-raygratinginterferometers were developed that extend the possibility of phase-contrast imaging from highly brilliant radiation sources like third-generation synchrotron sources to non-coherent conventional x-ray tube sources. Here we present the first installation of a three gratingx-rayinterferometer at a low-coherence wigglersource at the beamline W2 (HARWI II) operated by the Helmholtz-Zentrum Geesthacht at the second-generation synchrotron storage ring DORIS (DESY Hamburg Germany). Using this type of the wiggler insertion device with a millimeter-sized source allows monochromatic phase-contrast imaging of centimeter sized objects with high photon flux. Thus biological and materials-science imaging applications can highly profit from this imaging modality. The specially designed gratinginterferometer currently works in the photon energy range from 22 to 30 keV and the range will be increased by using adapted x-ray optical gratings. Our results of an energy-dependent visibility measurement in comparison to corresponding simulations demonstrate the performance of the new setup.

Julia Herzen; Tilman Donath; Felix Beckmann; Malte Ogurreck; Christian David; Jrgen Mohr; Franz Pfeiffer; Andreas Schreyer

2011-01-01T23:59:59.000Z

319

Characterization of near-terahertz complementary metal-oxide semiconductor circuits using a Fourier-transform interferometer  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Optical methods for measuring of the emission spectra of oscillator circuits operating in the 400600 GHz range are described. The emitted power from patch antennas included in the circuits is measured by placing the circuit in the source chamber of a Fourier-transform interferometric spectrometer. The results show that this optical technique is useful for measuring circuits pushing the frontier in operating frequency. The technique also allows the characterization of the circuit by measuring the power radiated in the fundamental and in the harmonics. This capability is useful for oscillator architectures designed to cancel the fundamental and use higher harmonics. The radiated power was measured using two techniques: direct measurement of the power by placing the device in front of a bolometer of known responsivity, and by comparison to the estimated power from blackbody sources. The latter technique showed that these circuits have higher emission than blackbody sources at the operating frequencies, and, therefore, offer potential spectroscopy applications.

Arenas, D. J. [Univ. of North Florida, Jacksonville, FL (United States); Shim, Dongha [Univ. of Florida, Gainesville, FL (United States); Koukis, D. I. [Univ. of Florida, Gainesville, FL (United States); Seok, Eunyoung [Univ. of Florida, Gainesville, FL and Texas Instruments, Dallas, TX (United States); Tanner, D. B. [Univ. of Florida, Gainesville, FL (United States); O, Kenneth K. [Univ. of Texas, Dallas, TX (United States)

2011-10-24T23:59:59.000Z

320

Design and Performance of the COOPS Sun Photometer  

E-Print Network [OSTI]

Wavelength(nm) MOBY Optronics Ratio A Radiance System2-nm-sr-counts ( cont. ) Wavelength(nm) MOBY Optronics RatioWavelength(nm) MOBY Ratio Optronics 0.. O l l i A Radiance

Beatman, Luke Valentine

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

DIRSIG Cloud Modeling Capabilities; A Parametric Study  

E-Print Network [OSTI]

1 DIRSIG Cloud Modeling Capabilities; A Parametric Study Kristen Powers powers:................................................................................................................... 13 Calculation of Sensor Reaching Radiance Truth Values for Cloudless & Stratus Cloud Scenes and Atmospheric Database Creation for Stratus Cloud Scene & Calculation of Associated Sensor Reaching Radiance

Salvaggio, Carl

322

Spatial Convergence of Bidirectional Reflectance Models  

Science Journals Connector (OSTI)

Analyses of bidirectional reflectance data are presented with implications regarding the spatial scales appropriate for inferring irradiances from radiances reflected by various surfaceatmosphere scenes. Multiple-angle radiance data collected in ...

John M. Davis; Stephen K. Cox

1998-10-01T23:59:59.000Z

323

ARM - Instrument - mfrirt  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

: Infrared Thermometer (MFRIRT): upwelling radiance, instantaneous 20-sec at 25-meter height Primary Measurements The following measurements are those considered...

324

Variance in Bidirectional Reflectance over Discontinuous Plant Canopies  

E-Print Network [OSTI]

that the modified GO model improves predictions. corded radiance with changing Sun position and sensor view angle

Ni-Meister, Wenge

325

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Phase Determination in the Arctic Using AERI Data Phase Determination in the Arctic Using AERI Data D. D. Turner and S. A. Ackerman Cooperative Institute for Meteorological Satellite Studies University of Wisconsin - Madison Madison, Wisconsin Introduction Cloud-radiative processes in the Arctic have a large and significant effect on the global energy budget. Curry et al. (1996) have identified cloud phase as one of the primary unknowns, which affects the radiation budget in the Arctic. To correctly determine cloud properties, such as particle size and condensed water path that dictate the cloud's radiative effects, the cloud phase must be accurately determined. However, the presence of highly reflecting snow and ice, together with a persistent temperature inversion that exists much of the year, hampers the ability to remotely detect cloud phase.

326

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AERI/GOES Retrievals Versus Radiosondes AERI/GOES Retrievals Versus Radiosondes for Driving SCMs S. C. Xie, R. T. Cederwall, and J. J. Yio Lawrence Livermore National Laboratory Livermore, California W. F. Feltz University of Wisconsin-Madison Space Science and Engineering Center Madison, Wisconsin D. D. Turner Pacific Northwest National Laboratory Richland, Washington M. H. Zhang State University of New York at Stony Brook Stony Brook, New York Introduction Single-column models (SCMs) require observations to provide suitable initial and boundary conditions. To meet this need, the Atmospheric Radiation Measurement (ARM) Program conducts intensive operational periods (IOPs) to provide 3-hourly radiosondes and other observations. However, such high-frequency sonde launches can be expensive. Therefore, the ARM Program can only support a

327

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Variations in the Ratio of IR Window Radiance to Microwave Water Path Variations in the Ratio of IR Window Radiance to Microwave Water Path Observed Under Cloudless Convection Platt, C.M.(a) and Austin, R.T.(b), Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The measurement of the radiance of cirrus (and other) clouds at atmospheric window 8-13 micron wavelengths requires a correction for the water vapor radiance and transmittance below the clouds. Calculating radiances at the times of routine radiosonde ascents and interpolating the radiance/water path ratio between ascents can achieve this. However it has been observed experimentally that IR radiance/water path ratios appear to vary between radiosonde ascents away from the interpolated values. This occurs

328

Simulation and analysis of a multi-order imaging FabryPerot interferometer for the study of thermospheric winds and temperatures  

Science Journals Connector (OSTI)

We describe an analysis procedure for estimating the thermospheric winds and temperatures from the multi-order two-dimensional (2D) interferograms produced by an imaging FabryPerot...

Makela, Jonathan J; Meriwether, John W; Huang, Yiyi; Sherwood, Peter J

2011-01-01T23:59:59.000Z

329

Section 107  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Monte Carlo RT models. The main physical (TOA) radiance or surface irradiance may produce significant mechanisms treated by SAMCRT are described below. errors when applied...

330

Posters Preliminary Analysis of Ground-Based Microwave and Infrared...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 Posters Preliminary Analysis of Ground-Based Microwave and Infrared Radiance Observations During the Pilot Radiation OBservation Experiment E. R. Westwater, Y. Han, J. H....

331

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Turner DD and PJ Gero. 2011. "Downwelling infrared radiance temperature climatology for the Atmospheric Radiation Measurement Southern Great Plains site." Journal of...

332

SciTech Connect: Comparison of Gas Puff Imaging Data in NSTX...  

Office of Scientific and Technical Information (OSTI)

measured and modeled D light emission for speci c NSTX experiments. Both the simulated spatial distribution and radiance of the D light emission agree well with the...

333

Ion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

calibration The absolute calibration is performed with an integrating sphere (Optronics Laboratories model 455-8-1) whose spectral radiance is precisely known. The grating...

334

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

only systems. The radiative feedback implications of these disparities for numerical weather prediction models employing direct assimilation of satellite radiances (e.g.,...

335

E-Print Network 3.0 - assimilating remote sensing Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Using a Hybrid EnsembleGridpoint Statistical Interpolation Method for Global Numerical Weather... proposal is to improve the assimilation of satellite radiance data, which has...

336

E-Print Network 3.0 - aura tropospheric emission Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Laboratory Collection: Geosciences 12 Satellite measurements of the clear-sky greenhouse effect from Summary: of infrared radiance from the Tropospheric Emission Spectrometer9...

337

ARM - Instrument - sasze  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(SASZE) measures the zenith sky shortwave radiance over the spectral range from the near infrared to the ultraviolet. The SASZE incorporates two Avantes fiber-coupled...

338

Energy transport in optical systems with partially coherent light  

Science Journals Connector (OSTI)

The propagation of a generalized radiance through optical systems is considered under the customary assumptions of physical optics (paraxial propagation in a uniform medium and...

Friberg, Ari T

1986-01-01T23:59:59.000Z

339

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Characterization of the Atmospheric State above the SGP Characterization of the Atmospheric State above the SGP Using Raman Lidar and AERI/GOES Measurements R. A. Ferrare National Aeronautics and Space Administration Langley Research Center Hampton, Virginia D. D. Turner Pacific Northwest National Laboratory Richland, Washington L. A. Heilman Science Applications International Corporation National Aeronautics and Space Administration Langley Research Center Hampton, Virginia W. F. Feltz University of Wisconsin Madison, Wisconsin T. P. Tooman Sandia National Laboratories Livermore, California O. Dubovik Science Systems and Applications, Inc. National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland R. N. Halthore Brookhaven National Laboratory Upton, New York

340

The catalytic oxidation of propane and propylene with air: total aldehyde production and selectivity at low conversions.  

E-Print Network [OSTI]

~ Ths writer is izntebteg to pr, P G~ ~och Tor his assistance azsi guidance in this work aC to Br~ J+ 9 Kinds Tor his aery. suggestions eel Succor~ a The oxidation cf propane~ propylene and prcya~cregyimm mbetccres ctver a ~ aiucdna ~st in a flew... formation of aldehyde fran pure grade propane The ~ce of Within the range of variables of this investigation and with propylene ~& aldehyde pr~cn was f'ennd to bs independent of" residence Qorrcgations relating aldehyde pressure to ~ and cncygsn pressure...

Looney, Franklin Sittig

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

PowerPoint Presentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SAM Data SAM Data Cirrus (OD=1.6) Altostratus (OD = 1.3) 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 0.01 0.10 10.0 1.00 Angle From Center of Sun (deg) SAM Data Cirrus (OD=1.6) Altostratus (OD = 1.3) 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 0.01 0.10 10.0 1.00 Angle From Center of Sun (deg) 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 8 4 8 4 Angle From Center of Sun (deg) 0 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 8 4 8 4 Angle From Center of Sun (deg) 0 Radiance (W/cm 2 /sr) 550 ± 40 nm 10 +2 10 +0 10 -2 10 -4 10 -6 Elevation (pixels) Azimuth (pixels) 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 8 4 8 4 Angle From Center of Sun (deg) 0 10 +3 10 +1 10 -1 Radiance (W/cm 2 /sr/µm) 8 4 8 4 Angle From Center of Sun (deg) 0 Radiance (W/cm 2 /sr) 550 ± 40 nm 10 +2 10 +0 10 -2 10 -4 10 -6 Elevation (pixels) Azimuth (pixels) Introducing SAM (Sun and Aureole Measurement),

342

Monthly Weather Review EARLY ONLINE RELEASE  

E-Print Network [OSTI]

are used10 to estimate flow-dependent background error covariance. Two assimilation experiments11 have been conducted using precipitation-affected radiances from passive microwave12 sensors, one for a tropical storm the propagation of information in observed14 radiances via flow-dependent background error auto- and cross

Collett Jr., Jeffrey L.

343

Final Report: Global Change Research with Unmanned Aerospace Vehicles UAV Applications for Studying the Radiation and Optical Properties of Upper Tropospheric Clouds, February 1, 1995 - March 31, 1998  

SciTech Connect (OSTI)

This paper describes the design and characteristics of a scanning spectral polarimeter which is capable of measuring spectral radiances and fluxes in the range between 0.4 rm to 4.0 pm. The instrument characteristics are described and a discussion of the procedures to calibrate the unpolarized radiances and fluxes are prescribed along the detailed error analyses of this calibration.

Stephens, Graeme L.

1998-01-31T23:59:59.000Z

344

JULY 2002 1073M I T R E S C U A N D S T E P H E N S 2002 American Meteorological Society  

E-Print Network [OSTI]

Pacific island of Nauru under the auspices of the U.S. Department of Energy Atmospheric Radiation is limited to optically thin clouds, data obtained from this measurement approach has several advantages over optical depth information extracted from reflected solar radiances or emitted IR radiances (Miller et al

Stephens, Graeme L.

345

OPTI 550-Fundamentals of Remote Sensing Course Description  

E-Print Network [OSTI]

in the solar reflective 2. Reflected irradiance, BRDF, lambertian surface #12;3. Radiance at the sensor in the solar reflective, examples 4. Thermal radiance at the sensor 5. Spectral response, magnitude 6; satellite optical sensors; radiometric calibration of sensors; atmospheric correction. Textbook: Schott

Arizona, University of

346

ARM - Datastreams - avhrr12  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 2 Documentation XDC documentation Data Quality Plots ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AVHRR12 AVHRR: albedo and brightness temp., NOAA-12 Satellite Active Dates 1994.07.22 - 2007.08.09 Measurement Categories Radiometric Originating Instrument Advanced Very High Resolution Radiometer (AVHRR) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband radiance avhrr_ch1 Shortwave narrowband radiance avhrr_ch2 Longwave narrowband radiance avhrr_ch3 Longwave narrowband radiance avhrr_ch4 Longwave narrowband radiance avhrr_ch5 Locations North Slope Alaska NSA X1 Browse Data External Data (satellites and others)

347

ARM - Datastreams - avhrr10  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Documentation XDC documentation Data Quality Plots ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Datastream : AVHRR10 AVHRR: albedo and brightness temp., NOAA-10 Satellite Active Dates 1994.09.15 - 1999.10.09 Measurement Categories Radiometric Originating Instrument Advanced Very High Resolution Radiometer (AVHRR) Measurements The measurements below provided by this product are those considered scientifically relevant. Measurement Variable Shortwave narrowband radiance avhrr_ch1 Shortwave narrowband radiance avhrr_ch2 Longwave narrowband radiance avhrr_ch3 Longwave narrowband radiance avhrr_ch4 Longwave narrowband radiance avhrr_ch5 Locations North Slope Alaska NSA X1 Browse Data External Data (satellites and others)

348

Lighting Group: Software  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Software Software Lighting Software The Lighting Group has developed several computer programs in the course of conducting research on energy efficient lighting. Several of these programs have proven useful outside the research environment. One of the most popular programs for advanced lighting applications is Radiance. For more information on this program and its availability, click on the link below. RADIANCE Radiance is a suite of programs for the analysis and visualization of lighting in design. The primary advantage of Radiance over simpler lighting calculation and rendering tools is that there are no limitations on the geometry or the materials that may be simulated. Radiance is used by architects and engineers to predict illumination, visual quality and appearance of innovative design spaces, and by researchers to evaluate new

349

A high-frequency gravitational-wave burst search with LIGO's Hanford site  

E-Print Network [OSTI]

The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a network of long-arm interferometers designed to directly measure gravitational-wave strain. Direct observation of gravitational waves would provide a test ...

Villadsen, Jacqueline Rose

2009-01-01T23:59:59.000Z

350

A high-frequency gravitational-wave burst search with LIGO's Hanford site .  

E-Print Network [OSTI]

??The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a network of long-arm interferometers designed to directly measure gravitational-wave strain. Direct observation of gravitational waves would provide (more)

Villadsen, Jacqueline Rose

2009-01-01T23:59:59.000Z

351

Characterization of an advanced LIGO quadruple pendulum system  

E-Print Network [OSTI]

The Laser Interferometer Gravitational-wave Observatory (LIGO) measures relative displacements of the interferometer mirrors induced by passing gravitational waves (GWs). At low frequencies, typically below 30 Hz, seismic ...

Thomas, Andrew C. (Andrew Christopher), 1981-

2004-01-01T23:59:59.000Z

352

Electromagnetic counterparts of supermassive black hole binaries resolved by pulsar timing arrays  

Science Journals Connector (OSTI)

......predicted to be detectable by future space-based laser interferometers such as Laser Interferometer Space Antenna (LISA), with...2009) is that feedback mechanisms (such as nuclear fusion from stars that formed in the disc or their......

Takamitsu Tanaka; Kristen Menou; Zoltn Haiman

2012-02-11T23:59:59.000Z

353

E-Print Network 3.0 - aufbau und simulation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

354

E-Print Network 3.0 - aufbau und inbetriebnahme Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

355

E-Print Network 3.0 - aufbau und erprobung Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

hauptschlich bestehend aus zwei faserbasierten und temperaturstabilisierten... von Autodesk Inventor. Anschlieend mssen die Interferometer erstellt und in den Aufbau...

356

Fiber optic geophysical sensors  

DOE Patents [OSTI]

A fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects.

Homuth, Emil F. (Los Alamos, NM)

1991-01-01T23:59:59.000Z

357

Posters Comparisons of Brightness Temperature Measurements and Calculations Obtained  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Posters Comparisons of Brightness Temperature Measurements and Calculations Obtained During the Spectral Radiance Experiment Y. Han, J. B. Snider, and E. R. Westwater National Oceanic and Atmospheric Administration Environmental Research Laboratories/Environmental Technology Laboratory Boulder, Colorado S. H. Melfi National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland R. A. Ferrare Hughes STX Corporation Lanham, Maryland Introduction In radiometric remote sensing of the atmosphere, the ability to calculate radiances from underlying state variables is fundamental. To infer temperature and water vapor profiles from satellite- or ground-based radiometers, one must determine cloud-free regions and then calculate clear-sky radiance emerging from the top of the earth's

358

Recommendation of a Strategy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Accelerating Radiance Using OpenCL on GPU Accelerating Radiance Using OpenCL on GPU Wangda Zuo, Ph.D. Simulation Research Group Energy and Environmental Technologies Division Lawrence Berkeley National Laboratory EETD Seminar, 06/22/2011 Acknowledgement 2 Project Members: Andrew McNeil, Michael Wetter, Eleanor Lee Funding Agency: California Energy Commission Objective 3 To accelerate annual daylighting simulations for fenestration systems in Radiance ray- tracing program. Why OpenCL? 4 Parallel programming language Cross-platforms (personal computers, servers, handheld/embedded devices) Open and royalty free 5 Step 1: Optimizations of Algorithms Annual daylighting simulation is done by Radiance program dctimestep.c For i=1 to 8760 Call dctimetsep.c : V I (t i ) = M V M T M D V S (t i ) V I (t) is the illuminace vector for a specific time step, t

359

ARM - Facility News Article  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Sunphotometer Re-installed at North Slope of Alaska Sunphotometer Re-installed at North Slope of Alaska Bookmark and Share The CIMEL sunphotometer takes sky radiance measurements during daylight hours, when the sun is above horizon. The CIMEL sunphotometer takes sky radiance measurements during daylight hours, when the sun is above horizon. In early May, a CIMEL sunphotometer owned by the National Aeronautics and Space Administration (NASA) was re-installed at Barrow, Alaska, one of two research sites that make up the ARM Climate Research Facility's North Slope of Alaska (NSA) locale. The CIMEL is a multi-channel, automatic sun-and-sky scanning radiometer that takes daytime measurements of direct solar radiance and sky radiance at the Earth's surface. Measurements are taken at discrete wavelengths in visible and near-infrared regions of the solar

360

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Absolute Radiance Calibration Techniques for the Whole Sky Imager Absolute Radiance Calibration Techniques for the Whole Sky Imager Shields, J.E. (a), Johnson, R.W. (a), Tooman, T.P. (b), Karr, M.E. (a), Burden, A.R. (a), and Baker, J.G. (a), Scripps Institution of Oceanography (a), Sandia National Laboratories (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Day/Night Whole Sky Imager is designed to provide absolute radiance distributions over the full upper hemisphere, as well as providing an assessment of cloud fraction and cloud spatial properties. In order to provide radiance distributions, the instrument must be calibrated using absolute radiometry techniques adapted for use with an imager. These techniques are particularly demanding due to the large dynamic range required to acquire data from full daylight to starlight. For example, a

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Using HIRS Radiances Delamere, J.S. (a), Iacono, M.J. (a), Mlawer, E.J. (a), Cady-Pereira, K. (a), Clough, S.A. (a), Stamnes, K. (b), and Bates, J.J. (c), Atmospheric and...

362

Evaluation on penetration rate of cloud for incoming solar radiation using geostationary satellite data  

Science Journals Connector (OSTI)

Solar surface insolation (SSI) represents how much solar radiance reaches the Earths surface in a specified area and is an important parameter in various fields such as surface energy research, meteorology, a...

Jong-Min Yeom; Kyung-Soo Han; Jae-Jin Kim

2012-05-01T23:59:59.000Z

363

4PAPERDRAFT COMPSTAT'2004 Symposium c Physica-Verlag/Springer 2004  

E-Print Network [OSTI]

, Wind Speed, Temperature, Humidity and Sun Radiance. These variables are observed in six different variables, in- dependent and identically distributed, with the same distribution as (X, Y ), with X

Boyer, Edmond

364

Marine optical measurements of a mucilage event in the northern ...  

Science Journals Connector (OSTI)

homogeneously distributed throughout the water column and, in particular, approaching the surface, there was a .... (0, 8, and 14 m) for biogeochemical analyses, temperature and conductivity profiles, sky radiance and sun irradiance,

2000-02-23T23:59:59.000Z

365

Download  

Science Journals Connector (OSTI)

watt. 1. In this equation, C is a constant, H(X) is the downwelling incident spectral ir- radiance on the photodetector, and Y(X) is the response spectrum; that is,...

Orcas

366

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

participate in the ARM Mixed-Phase Arctic Cloud Experiment in the Fall of 2004. From the UAV platform, the S-HIS measures the up and downwelling infrared radiance at high spectral...

367

bergin-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

absorption coefficient (Radiance Inc., PSAP), condensation nuclei (TSI Inc., Model 3010 CNC), and particle size distribution from 0.10 m to 10.0 m (PMS Inc., PCASP). Total...

368

Retrieval of cloud-cleared atmospheric temperature profiles from hyperspectral infrared and microwave observations  

E-Print Network [OSTI]

This thesis addresses the problem of retrieving the temperature profile of the Earth's atmosphere from overhead infrared and microwave observations of spectral radiance in cloudy conditions. The contributions of the thesis ...

Blackwell, William Joseph, 1971-

2002-01-01T23:59:59.000Z

369

Spatial pattern recognition for crop-livestock systems using multispectral data  

E-Print Network [OSTI]

Within the field of pattern recognition (PR) a very active area is the clustering and classification of multispectral data, which basically aims to allocate the right class of ground category to a reflectance or radiance ...

Gonzlez, Adrin

2008-01-01T23:59:59.000Z

370

Lbnnol. Ocenno~r., 43(5)  

Science Journals Connector (OSTI)

... or Raman scattering, are not considered here. The scalar n-radiance EO(r) = EOd( T) + EOu(@ is given in terms of its downward and upward components by.

371

Download  

Science Journals Connector (OSTI)

where Eod(z) is the downwelling scalar ir- radiance at depth z. The subscript 0 on. Do indicates that it applies to the same il- lumination condition as the ocean...

2000-03-18T23:59:59.000Z

372

Web integrated cost estimation system in architecture education  

E-Print Network [OSTI]

available for specialized lighting tasks, from solar shadow-casting and lighting-efficiency calculations to designing custom luminaires (Laiserin, 2001). Radiance developed at Lawrence Berkley Laboratory and Lightscape a product of Autodesk are a few...

Darapureddy, K.S. Kiran

2001-01-01T23:59:59.000Z

373

Low Light Imaging for Power Outage and Fire Detection  

E-Print Network [OSTI]

boats. Fires in Africa Gas flares ­ Persian Gulf Fishing boats & city lights - Japan #12;Sorting The Recovery of Lighting? Gulf Coast USA Radiance Calibrated Lights 2006=red 2003=green 2000=blue #12;New

374

Satellite Data Assimilation in Numerical Weather Prediction Models. Part I: Forward Radiative Transfer and Jacobian Modeling in Cloudy Atmospheres  

Science Journals Connector (OSTI)

Satellite data assimilation requires rapid and accurate radiative transfer and radiance gradient models. For a vertically stratified scattering and emitting atmosphere, the vector discrete-ordinate radiative transfer model (VDISORT) was developed ...

Fuzhong Weng; Quanhua Liu

2003-11-01T23:59:59.000Z

375

Very short range local area weather forecasting using measurements from geosynchronous meteorological satellites  

Science Journals Connector (OSTI)

Quantitative radiance measurements from NASA's ATS-3 geosynchronous satellite have been used to develop and test ... a statistical forecst method to predict air terminal weather over the very short range (06 ......

Gerald J. Sikula; Dr. Thomas H. Vonder Haar

1973-01-01T23:59:59.000Z

376

www.vadosezonejournal.org Vol. 7, No. 2, May 2008 533 S is an important hydrologic state variable  

E-Print Network [OSTI]

, and vegetation characteristics (Corwin et al., 2006). Monitoring all these processes across multiple scales). The geophysical and biological processes that determine vegetation, soil moisture, and other surface scales. A consequence is that the surface radiance fields are statistically interrelated across

Long, Bernard

377

EVALUATION OF RAPID THERMAL PROCESSING SYSTEMS AND THEIR ROLE IN FABRICATION OF NEXT GENERATION CORE CMOS FABRICATION  

E-Print Network [OSTI]

versus photon energy for Ge_______13 2.9 Solar spectral radiance versus wavelength for different_____________________________45 3.3 Tool B: Furnace and pyrometer schematics________________________46 3.4 Tool C: Arrangement

Pearton, Stephen J.

378

Energy Flux We discuss various ways of describing energy flux and related quantities.  

E-Print Network [OSTI]

.0.4 Radiance Radiance is the energy flux density per solid angle.[W/(m2 ? steradian)] 6.0.5 Radiant Intensity Radiant intensity is the energy flux per solid angle [W/steradian] (radiometry) 6.0.6 Intensity Intensity)· ^Ndt (6.4) Intensity is again measured in [W/m2 ] 6.0.7 Fluence Fluence is radiant energy per area

Palffy-Muhoray, Peter

379

Quantum Interferometric Sensors  

E-Print Network [OSTI]

Quantum entanglement has the potential to revolutionize the entire field of interferometric sensing by providing many orders of magnitude improvement in interferometer sensitivity. The quantum-entangled particle interferometer approach is very general and applies to many types of interferometers. In particular, without nonlocal entanglement, a generic classical interferometer has a statistical-sampling shot-noise limited sensitivity that scales like $1/\\sqrt{N}$, where $N$ is the number of particles passing through the interferometer per unit time. However, if carefully prepared quantum correlations are engineered between the particles, then the interferometer sensitivity improves by a factor of $\\sqrt{N}$ to scale like 1/N, which is the limit imposed by the Heisenberg Uncertainty Principle. For optical interferometers operating at milliwatts of optical power, this quantum sensitivity boost corresponds to an eight-order-of-magnitude improvement of signal to noise. This effect can translate into a tremendous science pay-off for space missions. For example, one application of this new effect is to fiber optical gyroscopes for deep-space inertial guidance and tests of General Relativity (Gravity Probe B). Another application is to ground and orbiting optical interferometers for gravity wave detection, Laser Interferometer Gravity Observatory (LIGO) and the European Laser Interferometer Space Antenna (LISA), respectively. Other applications are to Satellite-to-Satellite laser Interferometry (SSI) proposed for the next generation Gravity Recovery And Climate Experiment (GRACE II).

Kishore T. Kapale; Leo D. Didomenico; Hwang Lee; Pieter Kok; Jonathan P. Dowling

2005-07-15T23:59:59.000Z

380

Slide 1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Network for the Network for the Measurement of Greenhouse Radiative Fluxes with ARM AERI W.F.J. Evans, York University Radiative forcing IPCC usage Radiative forcing IPCC usage  In climate science, radiative forcing is (loosely) defined as the change in net irradiance at the tropopause. "Net irradiance" is the difference between the incoming radiation energy and the outgoing radiation energy in a given climate system and is measured in Watts per square meter. The change is computed based on "unperturbed" values; the IPCC measures change relative to the year 1750. It is the amount of upward thermal radiation absorbed by changes in gases in the atmosphere.  Greenhouse radiation or IR surface radiative flux is the downward long wave

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Meeting Meeting 2002 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Science Team Meeting Proceedings Cover image Proceedings of the Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting ARM-CONF-2002, April 2002 St. Petersburg, Florida For proper viewing, extended abstracts should be viewed with Adobe Acrobat Reader. Download the latest version from the Adobe Reader website. View session papers by Author or Title. * Poster abstract only; an extended abstract was not provided by the author(s). A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A Ackerman, S.A. Cloud Phase Determination in the Arctic Using AERI Data ERBE OLR and Cloud Type by Split Window* Ackerman, T.P. A Climatology of Shortwave Cloud Radiative Forcing Using Ground-Based Broadband Radiometric Time-Series*

382

ARM - Field Campaign - Winter Single Column Model IOP  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govCampaignsWinter Single Column Model IOP govCampaignsWinter Single Column Model IOP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Winter Single Column Model IOP 1999.01.19 - 1999.02.08 Lead Scientist : David Randall Data Availability Actual data files for a number of past SCM IOPs are available from the ARM Archive under IOPs/UAV. Cloud and Radiation Products Derived from Satellite Data Colorado State's Single Column Modeling Home Page For data sets, see below. Description A second winter SCM IOP was conducted (1/19 - 2/8/99) to provide additional sampling of winter weather conditions. This was the first SCM IOP where AERIs and ceilometers were installed at the boundary facilities to give retrievals of temperature and moisture to supplement the sounding data. A

383

ARM - VAP Product - 10rlprofbe1turn  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

turn turn Documentation Data Management Facility Plots (Quick Looks) Citation DOI: 10.5439/1027251 [ What is this? ] Generate Citation ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Example 10rlprofbe1turn Data Plot Example 10rlprofbe1turn data plot VAP Output : 10RLPROFBE1TURN Raman LIDAR (RL): Best-estimate state of the atmos. profiles from RL & AERI+GOES retrievals Active Dates 1998.03.01 - 2004.01.06 Originating VAP Process Raman LIDAR Vertical Profiles : RLPROF Measurements The measurements below provided by this product are those considered scientifically relevant. Aerosol optical depth Aerosol scattering Backscatter depolarization ratio Backscattered radiation Cloud base height Liquid water content

384

PowerPoint-Präsentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Instrument Retrievals: Applications and New Synergies Instrument Retrievals: Applications and New Synergies Can we derive LWC profiles from MWRs ? U. Löhnert 1 , S. Crewell 1 , K. Ebell 1 , D. Turner 2 1 University of Cologne, Germany 2 University of Wisconsin-Madison, Madison, Wisconsin RHUBC-I, Alaska, 2007 ARM Science Team Meeting, 30 March -2 April 2009, Louisville, KY Summary "New" Synergies - Microwave & Infrared Method for combining measurements Acknowledgements: We thank the ARM Program and the German Science Foundation (DFG) for their support. * IPT (1DVar retrieval approach) applied to AMF-COPS dataset to retrieve temperature, humidity and LWC profiles from a combined a suite of sensors. * IPT results and errors are used to estimate SW/LW fluxes and their corresponding errors. * AERI retrievals of clear-sky temperature and humidity profiles outperform

385

Clough-SA  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Longwave Broadband QME Based on ARM Longwave Broadband QME Based on ARM Pyrgeometer and AERI Measurements S. A. Clough, A. D. Brown, C. Andronache, and E. J. Mlawer Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts T. R. Shippert and D. D. Turner Pacific Northwest National Laboratory Richland, Washington D. C. Tobin, H. E. Revercomb, and R. O. Knuteson University of Maryland College Park, Maryland Introduction Accurate modeling of the downwelling longwave flux at the surface is critical to our understanding of a number of important issues: the earth's energy balance; processes at the atmosphere's lower boundary including ice melt and ocean forcing; and evaluating our ability to model atmospheric fluxes for dynamical models including numerical weather prediction and climate models. Under the Atmospheric

386

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Progress Towards a Characterization of the Infrared Progress Towards a Characterization of the Infrared Emissivity of the Land Surface in the Vicinity of the ARM SGP Central Facility: Surface (S-AERI) and Airborne Sensors (NAST-I/S-HIS) R. O. Knuteson, B. Osborne, J. Short, H. E. Revercomb, D. C. Tobin, and S. L. Nasiri University of Wisconsin, Madison Madison, Wisconsin Introduction The U.S. Department of Energy (DOE) Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site provides a unique facility for the study of thermal radiation at and above the earth's surface. The site extends across a 250-km-square region in Oklahoma and Kansas dominated by rural agricultural land use. Upwelling thermal infrared (IR) radiation in the SGP CART site region is strongly influenced by surface radiative properties. The surface properties most appropriate for the representa-

387

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Comparison of High Spectral Resolution Infrared Cloud Boundary Algorithms A Comparison of High Spectral Resolution Infrared Cloud Boundary Algorithms using S-HIS and AERI Measurements Holz, R.E.(a), Antonelli, P.(a), Ackerman, S.(a), McGill, M.J.(a), Nagel, F.(a), Feltz, W.F.(a), and Turner, D.D.(b), Univeristy of Wisconsin, Madison (a), Pacific Northwest National Laboratory (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Cloud top pressure is an important parameter in determining the radiative impact of clouds on climate. In addition, atmospheric temperature and moister retrievals of cloudy scenes using high spectral resolution data require the cloud altitude be known. The S-HIS is scheduled to fly on the Proteus during the upcoming M-PACE experiment. In addition to the SHIS a lidar system and an imager will accompany the SHIS during MPACE. This paper

388

Optical detection of radio waves through a nanomechanical transducer  

Science Journals Connector (OSTI)

... . Barg and A. Nsby for assistance with the interferometer, and L. Jrgensen for cleanroom support. Kippenberg, T. J. & Vahala, K. J. Cavity optomechanics: back ...

T. Bagci; A. Simonsen; S. Schmid; L. G. Villanueva; E. Zeuthen; J. Appel; J. M. Taylor; A. Srensen; K. Usami; A. Schliesser; E. S. Polzik

2014-03-05T23:59:59.000Z

389

ARM - Field Campaign - MOPITT Campaign  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Limited number of spectra were obtained for the remaining days because of cloud cover. (4) ARM ground-based solar absorption Fourier transform interferometer (SORTI). SORTI...

390

Multi-Boson Correlation Interferometry and Boson Sampling in Time  

E-Print Network [OSTI]

We develop a general description of multi-boson interference based on correlated measurements in arbitrary passive linear interferometers for single input bosons with arbitrary temporal distributions. Our results allow us to fully describe boson sampling in time at the output of a random interferometer, in which the sampling takes place not only over the interferometer output ports but also over the joint-detection times. For any joint detection, both the time-dependent probability density and the time-averaged probability can be expressed by the permanents of matrices depending on the interferometer evolution and on the boson temporal distributions.

Vincenzo Tamma; Simon Laibacher

2014-10-29T23:59:59.000Z

391

CURRICULUM VITAE name: Huib Jan van Langevelde  

E-Print Network [OSTI]

-CSO interferometer and the IRAM 30m #12;were used. Most of the research focused on the small scale distribution MkIV Upgrade team. 1996

van Langevelde, Huib Jan

392

Integrated-optic fluid sensor using heat transfer  

Science Journals Connector (OSTI)

An integrated-optic fluid sensor utilizing the heat-transfer phenomenon is proposed. An optical waveguide interferometer is used to convert the temperature of the waveguide surface...

Enokihara, Akira; Izutsu, Masayuki; Sueta, Tadasi

1988-01-01T23:59:59.000Z

393

High-speed  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

system was operated as ei- ther a multi-channel interferometer or a polarimeter diagnos- tic, separately. To reconstruct the equilibrium current and magnetic field profiles and to...

394

Fiber optic geophysical sensors  

DOE Patents [OSTI]

A fiber optic geophysical sensor is described in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figures.

Homuth, E.F.

1991-03-19T23:59:59.000Z

395

Twin-beams digital holography for 3D tracking and quantitative phase-contrast microscopy in microfluidics  

Science Journals Connector (OSTI)

We report on a compact twin-beam interferometer that can be adopted as a flexible diagnostic tool in microfluidic platforms with twofold functionality. The novel configuration allows...

Memmolo, Pasquale; Finizio, Andrea; Paturzo, Melania; Miccio, Lisa; Ferraro, Pietro

2011-01-01T23:59:59.000Z

396

AMBER closure and differential phases: accuracy and calibration with a Beam Commutation  

E-Print Network [OSTI]

as on the Closure Phase. Keywords: Instrumentation: interferometers - Techniques: image processing - Methods: data on ESO paranal observations of calibrators made with AMBER during various commissioning and GTO runs

Paris-Sud XI, Université de

397

Pitchfork bifurcation and flip-flop operation with a coupled nonlinear system  

Science Journals Connector (OSTI)

A ring cavity system consisting of two hybrid Michelson interferometers coupled together with feedback is constructed. This system shows spatial bifurcation and can be utilized as an...

Yu, Young Hun; Park, Joong Mok; Lim, Tong Kun

1994-01-01T23:59:59.000Z

398

Chiu_ARMSTM_COPS.ppt  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Our retrieval method uses zenith radiance Our retrieval method uses zenith radiance measurements at 673, 870, and 1640 nm wavelengths and requires the presence of green vegetation in the surrounding area. * This method works because: 1. At 673 and 870nm, clouds have nearly identical optical properties, but vegetated surfaces reflect quite differently; 2. 1640 nm is a water-absorbing wavelength that contains information about the strength of forwarding scattering and absorption due to various cloud drop sizes. * Using a 1D radiative transfer model and surface reflectance from MODIS, we calculate zenith radiance I 673 , I 870 and , I 1640 as a function of cloud optical depth , effective cloud fraction A c , and cloud effective radius R eff to build our lookup tables (LUT) : * Using LUTs, we select possible solutions in which

399

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

"Radiance Assimilation" Correction Method Improves Water Vapor Radiosonde "Radiance Assimilation" Correction Method Improves Water Vapor Radiosonde Observations in the Upper Troposphere Submitter: Soden, B. J., University of Miami Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Soden, B.J., D.D. Turner, B.M. Lesht, and L.M. Miloshevich (2004), An analysis of satellite, radiosonde, and lidar observations of upper tropospheric water vapor from the Atmospheric Radiation Measurement Program, J. Geophys. Res., 109, D04105, doi:10/1029/2003JD003828. Time-average relative humidity profiles from both original (black) and radiance-adjusted (blue) radiosonde soundings compared to the lidar (red) retrievals from field campaigns in 1996, 1997, 1999, and 2000.

400

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Exploration of Statistical Angular Radiance Closure in Cloudy Skies Exploration of Statistical Angular Radiance Closure in Cloudy Skies Evans, K.F.(a) and Wiscombe, W.J.(b), University of Colorado (a), NASA/Goddard (b) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Most ARM cloudy sky radiation closure experiments have been performed with broadband fluxes. However, it is difficult to understand the causes of the inevitable discrepencies between the modeled and observed broadband fluxes in those closure experiments because the fluxes are extensively integrated over angle and wavelength. For example, knowing that a particular comparison disagrees by 50 W/m^2 is not particularly helpful in discovering which aspects of cloud remote sensing, radiative transfer, or measurements might be in error. Angular radiance closure compares the measured and

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Evaluation of Upper Tropospheric Water Vapor in the NCAR Community Climate Evaluation of Upper Tropospheric Water Vapor in the NCAR Community Climate Model, CCM3, Using Modeled and Observed HIRS Radiances Iacono, M.J., Delamere, J.S., Mlawer, E.J., and Clough, S.A., Atmospheric and Environmental Research, Inc. Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting Upper tropospheric water vapor (UTWV) simulated by the National Center for Atmospheric Research Community Climate Model, CCM3, is evaluated by comparing modeled, clear sky, brightness temperatures to those observed from space by the High-resolution Infrared Radiation Sounder (HIRS). The climate model was modified to utilize a highly accurate longwave radiation model, RRTM, and a separate radiance module, both developed for the Atmospheric Radiation Measurement (ARM) Program. The radiance module

402

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Determination of Thermodynamic Cloud Phase and Determination of Thermodynamic Cloud Phase and Reflective Field from Radiance Measurements J. Um and G.M. McFarquhar Department of Atmospheric Sciences University of Illinois at Urbana-Champaign Urbana, Illinois Introduction The thermodynamic cloud phase and composition have substantial impacts on vertical profiles of radiative heating. However, reliable retrievals of these quantities from remote sensing measurements are still difficult. Furthermore, retrieval techniques using satellite radiance measurements are limited to at most a few viewing angles. During the 2004 Mixed-Phase Arctic Clouds Experiment (M-PACE) at the North Slope of Alaska site, the Diffuse Field Camera (DFC) was mounted on the Proteus aircraft and measured cloud radiance fields in an effort to retrieve information about thermodynamic phase and

403

Section 14  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

An Analysis of Ground-Based Polarimetric An Analysis of Ground-Based Polarimetric Sky Radiance Measurements B. Cairns Columbia University New York, New York B. E. Carlson and A. A. Lacis NASA/Goddard Institute for Space Studies New York, New York E. Russell Spectir Corporation Goleta, California Abstract An analysis of polarimetric sky radiance measurements made with the engineering model of the Galileo photopolarimeter/radiometer at wavelengths of 410 nm and 678 nm is presented. The polarization measurements are accurate to within 0.1%, while the radiance measurements have no absolute calibration, but are linear over a wide dynamic range. The measurements analyzed are almucantar scans made in Goleta, California, which has a well-defined marine boundary layer. A two-layer model of the atmosphere was therefore used in which a Rayleigh scattering gas layer is

404

Radiometric characterization of a high temperature blackbody in the visible and near infrared  

SciTech Connect (OSTI)

At the Physikalisch-Technische Bundesanstalt the radiance temperature in the range from 962 C to 3000 C is disseminated by applying a high temperature blackbody (HTBB) with a directly heated pyrolytic graphite cavity. The thermodynamic radiance temperature of the HTBB was measured in the temperature range from 1000 C to 3000 C by applying almost simultaneously absolutely calibrated silicon photodiode based filter radiometers with centre wavelengths at 476 nm, 676 nm, 800 nm, 900 nm and 1000 nm and InGaAs photodiode based filter radiometers with centre wavelengths at 1300 nm, 1550 nm and 1595 nm. The results demonstrate that, expressed in terms of irradiance, within an uncertainty of 0.1 % (k=1) in a broad wavelength range the thermodynamic radiance temperature of the HTBB is wavelength independent in the investigated temperature interval.

Taubert, R. D.; Hollandt, J. [Physikalisch-Technische Bundesanstalt, Abbestrae 2-12, D-10587 Berlin (Germany)] [Physikalisch-Technische Bundesanstalt, Abbestrae 2-12, D-10587 Berlin (Germany)

2013-09-11T23:59:59.000Z

405

Research Highlight  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Spectral Invariant Behavior of Zenith Radiance Around Cloud Edges Observed Spectral Invariant Behavior of Zenith Radiance Around Cloud Edges Observed by ARM SWS Download a printable PDF Submitter: Marshak, A., NASA - Goddard Space Flight Center Knyazikhin, Y., Boston University Chiu, J., University of Reading Wiscombe, W. J., Brookhaven National Laboratory Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Marshak A, Y Knyazikhin, JC Chiu, and WJ Wiscombe. 2009. "Spectral invariant behavior of zenith radiance around cloud edges observed by ARM SWS." Geophysical Research Letters, 36, L16802, doi:10.1029/2009GL039366. (top) Time-wavelength color contour plot of ARM shortwave spectrometer (SWS) spectra measured from 21:35:24 to 21:40:24 UTC on 18 May 2007 at the ARM Climate Research Facility (ACRF) Southern Great Plains (SGP) site in

406

The Astrophysical Journal Letters, 712:L135L138, 2010 April 1 doi:10.1088/2041-8205/712/2/L135 C 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A.  

E-Print Network [OSTI]

by rather dense gas, dust, and active masers. Measurements of the star have been made recently at near due to effects from the spectra of the surrounding gas. Measurements of dust surrounding the star with the Infrared Spatial Interferometer (ISI). The interferometer, described by Hale et al. (2000), operates at 11

California at Berkeley, University of

407

ARM - Campaign Instrument - asti  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

govInstrumentsasti govInstrumentsasti Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : Absolute Solar Transmittance Interferometer (ASTI) Instrument Categories Radiometric Campaigns ASTI [ Download Data ] Southern Great Plains, 1997.06.01 - 1997.06.30 ASTI [ Download Data ] Southern Great Plains, 1998.07.01 - 1998.08.27 ASTI (Absolute Solar Transmittance Interferometer) IOP [ Download Data ] Southern Great Plains, 2000.09.26 - 2000.10.09 Absolute Solar Transmittance Interferometer [ Download Data ] Southern Great Plains, 1997.09.01 - 1997.09.30 Absolute Solar Transmittance Interferometer (ASTI) [ Download Data ] Southern Great Plains, 1996.04.01 - 1996.05.31 Absolute Solar Transmittance Interferometer (ASTI) [ Download Data ]

408

Berkeley Lab A to Z Index: R  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radiance Lighting Simulation and Rendering Software Package Radiance Lighting Simulation and Rendering Software Package Radiation Protection Group (EH&S) Radiation Safety Committee Charter Radiation Safety Committee Members Radon: High-Radon Project Radon Project Web Site for Homeowners Receiving Recharges (Computer Accounts) Rates, LookupForm, Etc. Recognition (Employee) Recovery Act (American Recovery and Reinvestment Act) Recovery Act Guidance for LBNL Employees Recruiting and Hiring Recruitment Recruiting & Hiring Guidelines Recycling (Waste Minimization) Reflective X-Ray Optics Relativistic Klystron Two-Beam Accelerator Program (AFRD) Renewable Energy Report Coordination Report Submission and Search Reporting Foreign Contacts Reporting Improper Governmental Activities Request for Issuance of Check (RFIC) Form

409

Microsoft PowerPoint - WINDOW6-ComplexGlazingTypeSummary-ForPresentation.ppt  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Christian Kohler, Mike Rubin, Jacob Jonsson Christian Kohler, Mike Rubin, Jacob Jonsson Dariush Arasteh, Robin Mitchell Windows & Daylighting Research Group March 2008 Complex Glazing Summary Complex Glazing Summary Environmental Energy Technologies Division Software Tools Overview Design / Simulation Tools DOE-2, EnergyPlus Radiance THERM (Window Frame) Optics (Window Glass) IGDB (Specular Glass Data Source) RESFEN (Whole Building Residential) COMFEN (Whole Building Commercial) CGDB (Complex Glazing Data Base) calculation calculation calculation WINDOW (Whole Window) Environmental Energy Technologies Division WINDOW6 Design / Simulation Tools DOE-2, EnergyPlus Radiance THERM (Window Frame) Optics (Window Glass) IGDB (Specular Glass Data Source) RESFEN (Whole Building Residential) COMFEN (Whole Building Commercial) CGDB (Complex Glazing

410

Radiative interactions: I. Light scattering and emission from irregular particles. II. Time dependent radiative coupling of an atmosphere-ocean system  

E-Print Network [OSTI]

index at 1.34 and illuminating wavelength at 0.5 ?m. . . . . . . . . . . . . . . . . . . . . . . . . . . 52 26 Same as Fig. 24 except for the Mueller images for forward scattering. 53 xii FIGURE Page 27 Particle geometries used in this study: a.... As shown in Fig. 1, deltaE is the energy of the radiance field that transfers across the small area dsigma in ? direction, within solid angle dOmega and in frequency interval (nu,nu+dnu). The radiance (L) can be defined in the following equation: delta...

Li, Changhui

2006-10-30T23:59:59.000Z

411

INSTRUMENTATION FOR FAR INFRARED SPECTROSCOPY.  

SciTech Connect (OSTI)

Fourier transform spectrometers developed in three distinct spectral regions in the early 1960s. Pierre Connes and his coworkers in France developed remarkably sophisticated step-scan interferometers that permitted near-infrared spectra to be measured with a resolution of better than 0.0 1 cm{sup {minus}1}. These instruments may be considered the forerunners of the step-scan interferometers made by Bruker, Bio-Rad (Cambridge, MA, USA) and Nicolet although their principal application was in the field of astronomy. Low-resolution rapid-scanning interferometers were developed by Larry Mertz and his colleagues at Block Engineering (Cambridge, MA, USA) for remote sensing. Nonetheless, the FT-IR spectrometers that are so prevalent in chemical laboratories today are direct descendants of these instruments. The interferometers that were developed for far-infrared spectrometry in Gebbie's laboratory ,have had no commercial counterparts for at least 15 years. However, it could be argued that these instruments did as much to demonstrate the power of Fourier transform spectroscopy to the chemical community as any of the instruments developed for mid- and near-infrared spectrometry. Their performance was every bit as good as today's rapid-scanning interferometers. However, the market for these instruments is so small today that it has proved more lucrative to modify rapid-scanning interferometers that were originally designed for mid-infrared spectrometry than to compete with these instruments with slow continuous scan or step-scan interferometers.

GRIFFITHS, P.R.; HOMES, C.

2001-05-04T23:59:59.000Z

412

JOURNAL DE PHYSIQUE CoZZoque C7, suppldment au n07, Tome 40, JuiZZet 1979, page C7-803 THE USEOF GAS DISCHARGESAS LLTRAVIOLETRADIOMETRIC STANDARDS  

E-Print Network [OSTI]

investigated: 1) a hydrogen wall-stabilized arc; 2) a blackbody- 1imi ted 1ine thermal arc plasma; 3) an argon "mini-arc"; 4) an argon "maxi-arc"; 5) a deuterium lamp; 6) a krypton dimer rf discharge lamp undertaken. The use of a hydrogen arc plasma as an absolute primary standard of uv spectral radiance has been

Paris-Sud XI, Université de

413

Galileo Plasma Wave Observations in the Io Plasma Torus and Near Io  

Science Journals Connector (OSTI)

...Hz to 5.6 MHz (1). During...frequencies above 1 MHz (Fig. 1...electrons (9). Large variations in...the electron plasma frequency and...factor of 2 larger than the Voyager...of the torus plasma, may now...thermally cool areas abound...assuming average atmospheric radiances...

D. A. Gurnett; W. S. Kurth; A. Roux; S. J. Bolton; C. F. Kennel

1996-10-18T23:59:59.000Z

414

Apparent Temperature Dependence on Localized Atmospheric Water Vapor  

E-Print Network [OSTI]

Apparent Temperature Dependence on Localized Atmospheric Water Vapor Matthew Montanaroa, Carl), hence water vapor is the primary constituent of concern. The tower generates a localized water vapor, Office B108, Aiken, SC, USA ABSTRACT The atmosphere is a critical factor in remote sensing. Radiance from

Salvaggio, Carl

415

AN APPROACH TO IMPROVEMENT TEMPERATURE AND MOISTURE RETRIEVALS FROM THE GOES SOUNDER MEASUREMENTS  

E-Print Network [OSTI]

are calculated from radiosonde observations of the atmospheric state, generating an ensemble of computed GOES together against radiances from CO2, water vapor, and window bands. This method is often used to generate on the changes in the atmospheric state using a physically-based retrieval of temperature and moisture profiles

Li, Jun

416

HES SIMULATION STUDY USING CUBE DATA FROM MM5 Fengying Sun  

E-Print Network [OSTI]

data are the "truth" atmosphere, which is used to generate simulated HES radiances with the forward square. The cube data includes atmospheric profiles (air temperature, water vapor and ozone) at 101). The atmospheric temperature and moisture profiles are retrieved by eigenvector regression retrieval with all

Li, Jun

417

4PAPERDRAFT COMPSTAT'2004 Symposium c Physica-Verlag/Springer 2004  

E-Print Network [OSTI]

, Wind Speed, Temperature, Humidity and Sun Radiance. These variables are observed in six different)i=1,...,n of pairs of random variables, in- dependent and identically distributed, with the same distribution as (X, Y ), with X belonging to the functional space L2 ([0, 1]) of square integrable func- tions

Crambes, Christophe

418

Solutions of the equation of radiative transfer by matrix operator techniques  

E-Print Network [OSTI]

heric Sciences is used as a pattern of format. the radiance for anisotropic scattering. Some of these methods such as that of Herman et al (1971) appear to be applicable only for small optical thicknesses. Important results using matrix or doubling...

Catchings, Frances Eugenia King

1973-01-01T23:59:59.000Z

419

616 VOLUME 17J O U R N A L O F A T M O S P H E R I C A N D O C E A N I C T E C H N O L O G Y 2000 American Meteorological Society  

E-Print Network [OSTI]

of energy for the large-scale circulation of the atmosphere. The variation of the fluxes of solar radiation, New Mexico (Manuscript received 24 November 1998, in final form 2 July 1999) ABSTRACT This paper) radiances. 1. Introduction Understanding the transfer of solar radiation in the earth's atmosphere

Stephens, Graeme L.

420

Cryptic and conspicuous coloration in the pelagic environment  

Science Journals Connector (OSTI)

...taking into account solar elevation and azimuth...pho- tons of lower energy and therefore longer...long-wavelength `solar' photons. The ability...A simple spectral solar irradiance model...radiance. Sol. Energy 41, 387392. Hemmings...Atlantic and Gulf of Mexico. Biol. Bull. 195...

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Galileo Photopolarimeter-Radiometer Observations of Jupiter and the Galilean Satellites  

Science Journals Connector (OSTI)

...assuming average atmospheric radiances and aver-ages...September 1996 Galileo Plasma Wave Observations...flyby of lo. The plasma wave subsystem...measure the spectrum of plasma waves and radio emissions...from 5 Hz to 5.6 MHz (1). During the...fre-quency (-20 to 60 kHz), uniquely identi-fies...

G. S. Orton; J. R. Spencer; L. D. Travis; T. Z. Martin; L. K. Tamppari

1996-10-18T23:59:59.000Z

422

A Penalized 4-D Var data assimilation method for reducing forecast M. J. Hossen  

E-Print Network [OSTI]

state and assimilated indirect observational data such as satellite radiance without trans- forming themA Penalized 4-D Var data assimilation method for reducing forecast error M. J. Hossen Department dimensional variational (4D-Var) Data Assimilation (DA) method is used to find the optimal initial conditions

Navon, Michael

423

Combined CloudSatCALIPSOMODIS retrievals of the properties of ice clouds  

E-Print Network [OSTI]

March 2010; published 21 July 2010. [1] In this paper, data from spaceborne radar, lidar and infrared radiometers on the "ATrain" of satellites are combined in a variational algorithm to retrieve ice cloud the impact of the microphysical assumptions on the algorithm when radiances are not assimilated by evaluating

Hogan, Robin

424

BEAM TILTED CORRELATIONS Frank Vignola  

E-Print Network [OSTI]

from tilted solar radiance. This model will then be used to estimate the performance of a photovoltaic. INTRODUCTION The number and variety of grid-tied photovoltaic (PV) systems being installed is stimulating, wind speed, and other meteorological variables and weather conditions. With the variety of solar cell

Oregon, University of

425

Transport theory for light propagation in random media Arnold D. Kim  

E-Print Network [OSTI]

of the radiative transport equation governing the radiance in a random medium. Using symmetry and orthogonal of radiative transport. We compute the Green's function for the transport equation as an expansion in plane, is governed by the radiative transport equation1 : · + a = -s + s S2 f( · )( , r

Kim, Arnold D.

426

74 OPTICS LETTERS / Vol. 29, No. 1 / January 1, 2004 Backscattering of beams by forward-peaked scattering media  

E-Print Network [OSTI]

on a scattering medium the diffusion approximation to the radiative transport equation is not valid for analyzing the radiance, we use the Fokker­Planck approximation to the radiative transport equation. Numerical results of the radiative transport equation. This ring is manifested from successive near-forward scattering events, so

Kim, Arnold D.

427

Monte Carlo simulation of converging laser beams propagating in biological materials  

E-Print Network [OSTI]

such as the diffusion approximation of the radiative transport equation7 and the more approxi- mate Kubelka­Munk two ap- proaches, the radiative transport theory1 has served as the foundation for many theoretical investigations. In this approach, the radiation field of light is ana- lyzed in terms of the radiance

428

Bioluminescence in a complex coastal environment: 2. Prediction of bioluminescent source depth from spectral  

E-Print Network [OSTI]

water-leaving radiance signals are detectable, even in extremely turbid and dynamic coastal waters. Here.1029/2007JC004136. 1. Introduction [2] Bioluminescence in the marine environment is caused by a wide array appears to serve a wide variety of ecological functions in the marine environment, from pred- ator

Moline, Mark

429

2706 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 37, NO. 6, NOVEMBER 1999 Models and Methods for Automated  

E-Print Network [OSTI]

on the illumination incident of the material and the atmospheric conditions. This dependence has limited the success and Atmospheric Conditions Glenn Healey, Senior Member, IEEE, and David Slater Abstract-- The spectral radiance over a wide range of conditions. Using the subspace model, we develop a local maximum

Salvaggio, Carl

430

Interactive Display of Isosurfaces with Global Illumination  

Science Journals Connector (OSTI)

In many applications, volumetric data sets are examined by displaying isosurfaces, surfaces where the data, or some function of the data, takes on a given value. Interactive applications typically use local lighting models to render such surfaces. This ... Keywords: Path tracing, isosurface, visualization, rendering, global illumination, precomputed radiance transfer.

Chris Wyman; Steven Parker; Peter Shirley; Charles Hansen

2006-03-01T23:59:59.000Z

431

4. LCD and Plasma Display Characterization 4.1 Overview  

E-Print Network [OSTI]

using Matlab- driven IEEE interface supplied by Lawrence Taplin. Spectral radiance measurements were and chromaticity coordinates computed using the CIE 1931 2° Standard Observer. The area surrounding the measured were characterized using one- dimensional lookup tables followed by a 3x3 matrix as outlined

432

17FEBRUARY 2004AMERICAN METEOROLOGICAL SOCIETY | he International MODIS (Moderate Resolution  

E-Print Network [OSTI]

broadcast from Terra or Aqua to produce calibrated and geolocated radiances and a variety of environmental, ELISABETH WEISZ, THOMAS RINK, KEVIN BAGGETT, JIM DAVIES, WILLIAM L. SMITH, AND JAMES C. DODGE SYSTEMS detection, fisheries management, weather forecasting, aviation safety, and ice forecasts. To date

Li, Jun

433

Unifying Points, Beams, and Paths in Light Transport Simulation Jaroslav Kivnek1  

E-Print Network [OSTI]

Unifying Points, Beams, and Paths in Light Transport Simulation Jaroslav Kivánek1 Iliyan Georgiev2 Point-point estimator (Volumetric photon mapping w/out ray marching [Jensen and Christensen 1998]) Point-beam estimator (Beam radiance estimate [Jarosz et al. 2008]) Beam-beam estimator (Photon beams [Jarosz et al

Montréal, Université de

434

Q. J. R. Meteorol. Soc. (2003), 129, pp. 33713389 doi: 10.1256/qj.02.217 Evaluation of moisture in the Hadley Centre climate model using  

E-Print Network [OSTI]

in the Hadley Centre climate model using simulations of HIRS water-vapour channel radiances By RICHARD P. ALLAN1 , M. A. RINGER1 and A. SLINGO2 1 Hadley Centre, Met Of ce, Exeter, UK 2ESSC, University of Reading, UK, are simulated within the Hadley Centre atmospheric climate model, version HadAM3, allowing direct comparison

Allan, Richard P.

435

Heterodimerization and Endocytosis of Arabidopsis Brassinosteroid Receptors BRI1 and AtSERK3 (BAK1)  

Science Journals Connector (OSTI)

...Bio-Rad Radiance 2100 MP system (Hercules, CA) in combination...Santa Clara, CA) that was pumped by a 5-W Coherent Verdi laser...2004). The plant endosomal system-Its structure and role in...Identification of the protein storage vacuole and protein targeting...

Eugenia Russinova; Jan-Willem Borst; Mark Kwaaitaal; Ana Caño-Delgado; Yanhai Yin; Joanne Chory; Sacco C. de Vries

2004-11-17T23:59:59.000Z

436

Evidence for habitat partitioning based on adaptation to environmental light in a pair of sympatric lizard species  

Science Journals Connector (OSTI)

...patches of xeric vegetation surrounded by rocky outcrops or sandy areas at the coast...measurement of all the light impinging on a flat surface measured over a hemisphere...background radiance is dominated by sand and rocky outcrops, both of which reflect short...

2002-01-01T23:59:59.000Z

437

This article was downloaded by: [University Of Maryland] On: 18 April 2012, At: 08:14  

E-Print Network [OSTI]

://www.tandfonline.com/loi/tres20 Enhancement of a fire-detection algorithm by eliminating solar contamination effects-detection algorithm by eliminating solar contamination effects and atmospheric path radiance: application to MODIS or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution

Li, Zhanqing

438

Gravitational-Wave Stochastic Background from Cosmic Strings  

Science Journals Connector (OSTI)

We consider the stochastic background of gravitational waves produced by a network of cosmic strings and assess their accessibility to current and planned gravitational wave detectors, as well as to big bang nucleosynthesis (BBN), cosmic microwave background (CMB), and pulsar timing constraints. We find that current data from interferometric gravitational wave detectors, such as Laser Interferometer Gravitational Wave Observatory (LIGO), are sensitive to areas of parameter space of cosmic string models complementary to those accessible to pulsar, BBN, and CMB bounds. Future more sensitive LIGO runs and interferometers such as Advanced LIGO and Laser Interferometer Space Antenna (LISA) will be able to explore substantial parts of the parameter space.

Xavier Siemens; Vuk Mandic; Jolien Creighton

2007-03-13T23:59:59.000Z

439

Optical domain analog to digital conversion methods and apparatus  

DOE Patents [OSTI]

Methods and apparatus for optical analog to digital conversion are disclosed. An optical signal is converted by mapping the optical analog signal onto a wavelength modulated optical beam, passing the mapped beam through interferometers to generate analog bit representation signals, and converting the analog bit representation signals into an optical digital signal. A photodiode receives an optical analog signal, a wavelength modulated laser coupled to the photodiode maps the optical analog signal to a wavelength modulated optical beam, interferometers produce an analog bit representation signal from the mapped wavelength modulated optical beam, and sample and threshold circuits corresponding to the interferometers produce a digital bit signal from the analog bit representation signal.

Vawter, Gregory A

2014-05-13T23:59:59.000Z

440

Providing radiometric traceability for the calibration home base of DLR by PTB  

SciTech Connect (OSTI)

A dedicated calibration technique was applied for the calibration of the spectral radiance transfer standard (RASTA) of the German Aerospace Center (DLR) at the Physikalisch-Technische Bundesanstalt (PTB), consisting of two independent but complementing calibration procedures to provide redundancy and smallest possible calibration uncertainties. Procedure I included two calibration steps: In a first step the optical radiation source of RASTA, an FEL lamp, was calibrated in terms of its spectral irradiance E{sub {lambda}}({lambda}) in the wavelength range from 350 nm to 2400 nm using the PTB Spectral Irradiance Calibration Equipment (SPICE), while in a second step the spectral radiance factor {beta}{sub 0 Degree-Sign :45 Degree-Sign }({lambda}) of the RASTA reflection standard was calibrated in a 0 Degree-Sign :45 Degree-Sign -viewing geometry in the wavelength range from 350 nm to 1700 nm at the robot-based gonioreflectometer facility of PTB. The achieved relative standard uncertainties (k= 1) range from 0.6 % to 3.2 % and 0.1 % to 0.6 % respectively. Procedure II was completely independent from procedure I and allowed to cover the entire spectral range of RASTA from 350 nm to 2500 nm. In the second procedure, the 0 Degree-Sign :45 Degree-Sign -viewing geometry spectral radiance L{sub {lambda},0 Degree-Sign :45 Degree-Sign }({lambda}) of RASTA was directly calibrated at the Spectral Radiance Comparator Facility (SRCF) of PTB. The relative uncertainties for this calibration procedure range from 0.8 % in the visible up to 7.5 % at 2500 nm (k= 1). In the overlapping spectral range of both calibration procedures the calculated spectral radiance L{sub {lambda},0 Degree-Sign :45 Degree-Sign ,calc}({lambda}) from procedure I is in good agreement with the direct measurement of procedure II, i.e. well within the combined expanded uncertainties (k= 2) of both procedures.

Taubert, D. R.; Hollandt, J.; Sperfeld, P.; Pape, S.; Hoepe, A.; Hauer, K.-O. [Physikalisch-Technische Bundesanstalt, Braunschweig und Berlin, 10587 Berlin (Germany); Gege, P.; Schwarzmaier, T.; Lenhard, K.; Baumgartner, A. [Deutsches Zentrum fuer Luft- und Raumfahrt, Institut fuer Methodik der Fernerkundung, 82234 Oberpfaffenhofen (Germany)

2013-05-10T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Pend Oreille Wetlands Wildlife Mitigation Projects, 2001 Annual Report.  

SciTech Connect (OSTI)

The Pend Oreille Wetlands project consists of two adjacent parcels totaling about 600 acres. The parcels make up the northern boundary of the Kalispel Indian Reservation, and is also adjacent to the Pend Oreille River about 25 miles north of Newport and Albeni Falls Dam (Figure 1). Located in the Selkirk Mountains in Pend Oreille County Washington, the project is situated on an active floodplain, increasing its effectiveness as mitigation for Albeni Falls Dam. The combination of the River, wetlands and the north-south alignment of the valley have resulted in an important migratory waterfowl flyway. Washington Department of Fish and Wildlife and Kalispel Natural Resource Department have designated both project sites as priority habitats. Seven habitat types exist on the project properties and include four wetland habitats (open water, emergent, and scrub-shrub and forested), riparian deciduous forest, upland mixed coniferous forest and floodplain meadow. Importance of the project to wildlife is further documented by the occurrence of an active Bald Eagle nest aerie.

Entz, Ray D. (Kalispel Tribe of Indians, Usk, WA)

2001-12-05T23:59:59.000Z

442

Recycling for radio astronomy  

Science Journals Connector (OSTI)

......research-article Features Recycling for radio astronomy Melvin Hoare Professor of Astrophysics at the...space missions, carry out single-dish radio astronomy and boost existing radio-astronomy interferometer arrays, objectives that bring......

Melvin Hoare

2012-02-01T23:59:59.000Z

443

A WASHINGTON STATE UNIVERSITY POSTDOCTORAL POSITION FOR WORK AT LIGO HANFORD, WA Applications are invited for a postdoctoral position in the Gravity Group at the Department of Physics  

E-Print Network [OSTI]

A WASHINGTON STATE UNIVERSITY POSTDOCTORAL POSITION FOR WORK AT LIGO HANFORD, WA Applications characterization for the Advanced Laser Interferometer Gravitational wave Observatory (LIGO) at the Hanford site characterization at the LIGO Hanford observatory. Familiarity with data analysis pipelines for searching

Collins, Gary S.

444

Search for gravitational waves from compact binary coalescence in LIGO and Virgo data from S5 and VSR1  

E-Print Network [OSTI]

We report the results of the first search for gravitational waves from compact binary coalescence using data from the Laser Interferometer Gravitational-Wave Observatory and Virgo detectors. Five months of data were collected ...

Barsotti, Lisa

445

DC readout experiment in Enhanced LIGO  

E-Print Network [OSTI]

The two 4 km long gravitational wave detectors operated by the Laser Interferometer Gravitational-wave Observatory (LIGO) were modified in 2008 to read out the gravitational wave channel using the DC readout form of homodyne ...

Fricke, Tobin T

446

An Artificial Neural Network Approach to Multispectral Rainfall Estimation over Africa  

Science Journals Connector (OSTI)

Multispectral Spinning Enhanced Visible and IR Interferometer (SEVIRI) data, calibrated with daily rain gauge estimates, were used to produce daily high-resolution rainfall estimates over Africa. An artificial neural network (ANN) approach was ...

Robin Chadwick; David Grimes

2012-06-01T23:59:59.000Z

447

Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case  

E-Print Network [OSTI]

We describe the angular sensing and control (ASC) of 4 km detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). Enhanced LIGO, the culmination of the first generation LIGO detectors, operated between ...

Dooley, Katherine L.

448

Shaping Coil Currents: 0 kA Vedge/Vcore: 43.8  

E-Print Network [OSTI]

of Drift Modes in LDX-Relevant Collisionality Regime MHD LIMIT UnstableUnstable Stable Stable From Kesner FLOATING COIL Block Diagram of Interferometer Setup We will have Magnetic Measurements for Both Equilibrium

449

Spark-plug-mounted fiber optic sensor for measuring in-cylinder pressure in engines  

E-Print Network [OSTI]

A new design for an in-cylinder fiber Fabry-Perot interferometer (FFPI) pressure sensor suitable for automotive engines has been investigated experimentally. The FFPI sensor consists of a single mode fiber containing two internal mirrors which form...

Bae, Taehan

2012-06-07T23:59:59.000Z

450

Signal processing for fiber optic acoustic sensor system  

E-Print Network [OSTI]

phase compensator. Two passive demodulation techniques based on a 3 by 3 output coupler in the Mach-Zehnder interferometer provide a way to eliminate phase fading suffered inside the interferometric sensors. System measurements utilizing the two...

Zhu, Juhong

2012-06-07T23:59:59.000Z

451

Nanoscale interfacial structure for Novel Opto-electronic and Ion-trapping Devices  

E-Print Network [OSTI]

the disk-head perturbations while flying. An interferometer-to directly load our flying heads on to the disk at 10 m/sflying height control slider with piezoelectric nanoactuator in hard disk

Ulin-Avila, Erick

2013-01-01T23:59:59.000Z

452

Pathways Towards Habitable Planets ASP Conference Series, Vol. 430, 2010  

E-Print Network [OSTI]

interferometer operating in the mid-infrared (e.g. 5-15 µm) designed to measure exozodiacal debris disks around such as formation flying and control of systematic noise sources are likely to prevent these missions from entering

Bordé, Pascal J.

453

Measurement of small amplitudes of vibration with a laser vibrometer  

Science Journals Connector (OSTI)

A method is examined for measuring amplitudes of vibration based on harmonic analysis of the output signal of a Michelson interferometer, with modulation of the frequency of radiation in the reference arm. The...

V. G. Atavin; Yu. V. Khudyakov; E. F. Yurchik

1999-11-01T23:59:59.000Z

454

Optical measurement of neural action potentials using low coherence heterodyne interferometry  

E-Print Network [OSTI]

We present a novel non-invasive optical method for detection of neural action potentials using low coherence interferometry. The dual beam heterodyne interferometer (DBHI) is a modified Michelson with a low coherence source ...

Chu, Mark Changhao, 1978-

2004-01-01T23:59:59.000Z

455

Application of machine learning algorithms to the study of noise artifacts in gravitational-wave data  

E-Print Network [OSTI]

The sensitivity of searches for astrophysical transients in data from the Laser Interferometer Gravitational-wave Observatory (LIGO) is generally limited by the presence of transient, non-Gaussian noise artifacts, which ...

Biswas, Rahul

456

Propane spectral resolution enhancement by the maximum entropy method  

Science Journals Connector (OSTI)

The Burg algorithm for maximum entropy power spectral density estimation is applied to a time series of data obtained from a Michelson interferometer and compared with a standard fast...

Bonavito, N L; Yeh, K C; Stewart, K P; Inguva, R; Hurley, E J

1990-01-01T23:59:59.000Z

457

Radio observations of the M8.1 solar flare of 23 June, 1988: Evidence for energy transport by thermal processes  

Science Journals Connector (OSTI)

The Very Large Array (VLA) and the frequency agile interferometer at the Owens Valley Radio Observatory (OVRO) were used to observe the M8.1 flare of 23 June, 1988. The VLA obtained images prior to and during ...

T. S. Bastian; D. E. Gary

1992-06-01T23:59:59.000Z

458

Determining the phase-energy coupling coefficient in carrier-envelope phase measurements  

Science Journals Connector (OSTI)

For f-to-2f interferometers based on white-light generation in sapphire plates, the accuracy of the carrier-envelope (CE) phase measurement and stabilization is affected by the laser...

Li, Chengquan; Moon, Eric; Wang, He; Mashiko, Hiroki; Nakamura, Christopher M; Tackett, Jason; Chang, Zenghu

2007-01-01T23:59:59.000Z

459

Coherent control of polarized neutron interferometry  

E-Print Network [OSTI]

In this thesis, we describe two sets of experiments using a single crystal neutron interferometer. First, we explore applications of quantum information processing (QIP) to magnetic materials characterization using polarized ...

Abutaleb, Mohamed Osama

2012-01-01T23:59:59.000Z

460

Coherence-controlled holographic microscope  

Science Journals Connector (OSTI)

Transmitted-light coherence-controlled holographic microscope (CCHM) based on an off-axis achromatic interferometer allows us to use light sources of arbitrary degree of temporal and...

Kolman, Pavel; Chmelk, Radim

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiance interferometer aeri" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

October  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

study of electron-beam microbunching dynamics. Tel-Aviv U. AE49 - Measurement of coherent terahertz radiation using a real-time interferometer. UCLA AE50 - Plasma Wakefields in the...

462

Collaborative Initiative in Biomedical Imaging to Study Complex Diseases  

SciTech Connect (OSTI)

The work reported addressed these topics: Fluorescence imaging; Optical coherence tomography; X-ray interferometer/phase imaging system; Quantitative imaging from scattered fields, Terahertz imaging and spectroscopy; and Multiphoton and Raman microscopy.

Lin, Weili [The University of North Carolina at Chapel Hill; Fiddy, Michael A. [The University of North Carolina at Charlotte

2012-03-31T23:59:59.000Z

463

Continuous operation of a one-way quantum key distribution system over installed telecom fibre  

Science Journals Connector (OSTI)

We demonstrate a robust, compact and automated quantum key distribution system, based upon a one-way Mach-Zender interferometer, which is actively compensated for temporal drifts in...

Yuan, Zhiliang; Shields, A

2005-01-01T23:59:59.000Z

464

Matter wave optical techniques for probing many-body targets  

E-Print Network [OSTI]

This thesis reports on our investigation of the uses of matter waves to probe many-body targets. We begin by discussing decoherence in an atom interferometer, in which a free gas acts as a refractive medium for a matter ...

Sanders, Scott Nicholas

2010-01-01T23:59:59.000Z

465

Resonant speed meter for gravitational wave detection  

E-Print Network [OSTI]

Gravitational-wave detectors have been well developed and operated with high sensitivity. However, they still suffer from mirror displacement noise. In this paper, we propose a resonant speed meter, as a displacement noise-canceled configuration based on a ring-shaped synchronous recycling interferometer. The remarkable feature of this interferometer is that, at certain frequencies, gravitational-wave signals are amplified, while displacement noises are not.

Atsushi Nishizawa; Seiji Kawamura; Masa-aki Sakagami

2008-05-01T23:59:59.000Z

466

Displacement-noise-free resonant speed meter for gravitational-wave detection  

E-Print Network [OSTI]

We demonstrate that speedmeter, based on double pumped resonant Sagnac interferometer, can be used as a displacement noise free gravitational-wave (GW) detector. The displacement noise of cavity mirrors can be completely excluded through a proper linear combination of the output signals. We show that in low-frequency region the obtained displacement-noise-free response signal is stronger than the one in previously proposed displacement noise free interferometers.

Sergey P. Vyatchanin

2008-08-26T23:59:59.000Z

467

The use of squeezed states and balanced homodyne for detecting gravitational waves  

E-Print Network [OSTI]

The possibility of using squeezed states and balanced homodyne detection of gravitational waves is discussed. It is shown that the quantum noise due to high laser intensities in Michelson interferometer for gravitational waves detection can be reduced by sending squeezed vacuum states to the 'dark' port of the interferometer. The present analysis describes photon statistics measurements effects related to quadrature balanced homodyne detection showing the advantage of using this scheme for detecting gravitational waves.

Y. Ben-Aryeh

2010-10-05T23:59:59.000Z

468

Speed limitations of optical switching using a piezoelectric transducer  

E-Print Network [OSTI]

. which will be used in computer simulations to predict results of the experiment. 20 CHAPTER III EXPERIMENTAL CONFIGURATION AND RESULTS 3. 1 Conflguration of Experiment A Michelson interferometer shown in Fig. 3. 1 is used to measure the switching.... which will be used in computer simulations to predict results of the experiment. 20 CHAPTER III EXPERIMENTAL CONFIGURATION AND RESULTS 3. 1 Conflguration of Experiment A Michelson interferometer shown in Fig. 3. 1 is used to measure the switching...

Wang, Chuan-Sheng

2012-06-07T23:59:59.000Z

469

partain-99.PDF  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SSP Cloud Retrieval Based Shortwave Flux Simulations SSP Cloud Retrieval Based Shortwave Flux Simulations During ARESE and SUCCESS P. T. Partain, S. D. Miller, G. L. Stephens, R. F. McCoy, and R. McCoy Department of Atmospheric Science Colorado State University Fort Collins, Colorado Introduction During the fall 1995 (ARM Enhanced Shortwave Experiment [ARESE]) and spring 1996 (Subsonic Aircraft Contrail and Cloud Effects Special Study [SUCCESS]) Atmospheric Radiation Measurement (ARM) Program Intensive Operational Periods (IOPs), the Egrett aircraft carried several instruments designed to measure shortwave flux and radiance reflected off clouds and the earth's surface. These instruments included the Scanning Spectral Polarimeter (SSP) measuring spectral radiance and flux between 0.4 µm and 1.1 µm, the Total Direct-Diffuse Radiometer (TDDR) measuring spectral flux at

470

LBNL Window & Daylighting Software -- WINDOW 6 Research Version  

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2 2 Last Updated: 12/29/2013 If you find bugs, or have comments about this version, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 7.2 (7.2.29) (12/29/2013) Release Notes -- Please read these before running this version ! This version contains these new modeling features Honeycomb shades Dynamic Glazing (Thermochromic and Electrochromic) This version is compatible with THERM 7.1 Please send us emails as you find issues in the program -- that is the only way that we can make it more robust. We hope to iterate versions fairly quickly in the next month or so to get the bugs ironed out. Radiance for WINDOW 7 Get a copy of Radiance for WINDOW 7.2 Must be used with WINDOW 7.0.59 or later

471

ARM - Publications: Science Team Meeting Documents  

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Sun Photometer Laser and Lamp Based Radiometric Calibrations Sun Photometer Laser and Lamp Based Radiometric Calibrations Allen, D.W.(a), Souaidia, N.(a), Pietras, C.(b), Brown, S.(a), Lykke, R.(a), Frouin, R.(c), Deschamps, P.Y.(d), Fargion, G.(b), and Johnson, B.C.(a), National Institute of Standards and Technology (a), National Aeronautics and Space Administration, SAIC (b), Scripps Institution of Oceanography (c), Laboratoire d'Optique Atmospherique, France (d) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting The goals of this study were to calibrate the radiometers using independent methods, evaluate the uncertainties for each method, and assess the influence of the results in terms of the science requirements. The radiometers were calibrated in irradiance and radiance mode using a monochromatic, laser-illuminated integrating sphere, in radiance mode using

472

Raciometry W. J:. Shaw and C. D. Whiteman Pacific Northwest Laboratory(a)  

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W. J:. Shaw and C. D. Whiteman W. J:. Shaw and C. D. Whiteman Pacific Northwest Laboratory(a) Richland, WA 99352 Field measurements to evaluate the parameterizations used in this model were carried out in May 1992 under clear skies using short- and long-wave radiometers mounted on a computer-driven platform. The platform repeatedly stepped through 360 degrees of azimuth and 20 degrees of elevation about the horizontal over a 24-h period. Radiosondes were released to account for the dependence of downwelling long-wave radiance on atmospheric water vapor. These observations compare satisfactorily with model integrations. Using the parameterized radiances and Gaussian tipping in one dimension, we have shown tnat the balloon-borne radiometer platform will work satisfactorily if oscillations about level are on the order of a degree or

473

X:\ARM_19~1\PGS29-47.WPD  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cm cm 1 Session Papers 29 Initial Analyses of Surface Spectral Radiance Between Observations and Line-by-Line Calculations P. D. Brown and S. A. Clough N. E. Miller, T. R. Shippert, and D. D. Turner Atmospheric and Environmental Research, Inc. Pacific Northwest National Laboratory Cambridge, Massachusetts Richland, Washington R. O. Knuteson, H. E. Revercomb, and W. L. Smith University of Wisconsin Madison, Wisconsin Introduction The evaluation and improvement of radiative transfer cal- culations are essential to attain improved performance of general circulation models (GCMs) for climate change applications. A Quality Measurement Experiment (QME) is being conducted to analyze the spectral residuals between the downwelling longwave radiance measured by the University of Wisconsin Atmospheric Emitted

474

ARM - Publications: Science Team Meeting Documents: Effects of Aerosol Size  

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Effects of Aerosol Size Distribution and Vertical Profile on the Effects of Aerosol Size Distribution and Vertical Profile on the Polarization in the Oxygen A-Band Duan, Minzheng State University of New York at Albany Min, Qilong State University of New York at Albany A vector radiative transfer code with successive order of scattering method was used to simulate the high-resolution polarization spectra in the oxygen A-band. The effects of aerosol size distribution and vertical profile on the radiance and polarization at the top and bottom of the atmosphere were analyzed. The impacts of instrument specification on information content are also analyzed. Polarized radiances were dominated (>95%) by the first and second orders of scattering. The contributions of scattering from different levels to the TOA and surface observation are analyzed. The

475

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Aerosol Absorption, Optical Depth and Vertical Extent Estimates Using Aerosol Absorption, Optical Depth and Vertical Extent Estimates Using UV/blue Satellite Measurements Cairns, B., and Alexandrov, M.D., Columbia University; Carlson, B.E., and Lacis, A.A., NASA Goddard Institute for Space Studies Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting The radiative balance of the atmosphere and the climatological response of the atmospheric circulation to changes in aerosol loading is principally determined by the vertical extent and single-scatter albedo of the aerosols. Although UV radiance measurements made by the Total Ozone Mapping Experiment Spectrometer (TOMS) instrument have been used to detect UV absorbing aerosols and estimate their properties, the unknown verticalextent of the aerosol affects the sensitivity of the radiances to

476

Introducing SAM (Sun and Aureole Measurement), a New, Ground-based  

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Introducing SAM (Sun and Aureole Measurement), a New, Ground-based Introducing SAM (Sun and Aureole Measurement), a New, Ground-based Capability for Measuring Cloud Optical Properties DeVore, John Visidyne, Inc. Stair, A Visidyne McClatchey, Robert McClatchey Associates Category: Instruments Visidyne has developed a new, ground-based capability for the remote measurement of cloud and aerosol optical properties. Named SAM, for Sun and Aureole Measurement, this system makes precise measurements of the radiance profile of the solar disk and aureole. The radiance of the solar disk affords a definitive measure of the column optical depth when corrected for forward scattering. The aureole profile is a measure of the forward scattering properties of the particles in the column and can be used to correct the optical depth. The aureole profile can also be used to derive

477

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Correction of Sonde Upper Tropospheric Humidity Through Radiance Correction of Sonde Upper Tropospheric Humidity Through Radiance Assimilation Soden, B.J.(a), Turner, D.D.(b), and Lesht, B.M.(c), NOAA/GFDL (a), Pacific Northwest Natinal Laboratory (b), Argonne National Laboratory (c) Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting The difficulty of measuring upper tropospheric water vapor from radiosonde instrumentation is widely recognized. Recent results from several ARM IOPs and the AFWEX field campaign have demonstrated a substantial dry bias in sonde measurements. Existing corrections for these measurements can improve the moisture concentrations at lower levels, but offer little improvement in the upper troposphere. Unfortunately, accurate measurements of upper tropospheric water vapor are necessary to constrain the transfer of

478

Infrared Cloud Imager Deployment at the North Slope of Alaska During Early 2002  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Infrared Cloud Imager Deployment Infrared Cloud Imager Deployment at the North Slope of Alaska During Early 2002 J. A. Shaw and B. Thurairajah Department of Electrical and Computer Engineering Montana State University Bozeman, Montana E. Edqvist National Oceanic and Atmospheric Administration Environmental Technology Laboratory Boulder, Colorado K. Mizutani Communications Research Laboratory Koganei, Tokyo, Japan Introduction Starting in February 2002, we deployed a new cloud-radiation sensor called the infrared cloud imager (ICI) at the North Slope of Alaska (NSA) site near Barrow, Alaska (71.32 N, 156.62 W). ICI records radiometrically calibrated images of the thermal infrared sky radiance in the 8µm to 14 µm wavelength band, from which spatial cloud statistics and spatially resolved cloud radiance can be determined.

479

ARM - Publications: Science Team Meeting Documents: Nighttime cirrus  

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Nighttime cirrus detection using AIRS radiances and total column Nighttime cirrus detection using AIRS radiances and total column precipitable water Kahn, Brian Jet Propulsion Laboratory Liou, Kuo-Nan UCLA A method of cirrus detection at nighttime is presented that utilizes 3.8 and 10.4 m infrared (IR) window brightness temperature differences (dBT) and total column precipitable water (PW) measurements. This technique is applied to the Atmospheric Infrared Sounder (AIRS) and Advanced Microwave Sounding Unit A (AMSU-A) instrument suite onboard EOS-Aqua, where dBT is determined from sets of carefully selected AIRS window channels, while PW is derived from the synergistic AIRS and AMSU-A water vapor retrievals. Simulated and observed dBT for a particular value of PW is not constant; several physical factors impact dBT, including the variability in

480

An Instrument Design Concept for Measuring Solar Diffuse Irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

An Instrument Design Concept for Measuring Solar Diffuse Irradiance An Instrument Design Concept for Measuring Solar Diffuse Irradiance Rutledge, Charles NASA Langley Research Center Schuster, Greg NASA Langley Research Center Category: Instruments Recent effort towards the development of a diffuse horizontal solar irradiance standard group [Michalsky et.al. 2005] using well calibrated pyranometers suggested that inter-instrument differences in cosine response characteristics may be problematic. They showed a calibration method using overcast skies (an approximately uniform radiance distribution) produced superior diffuse radiometer performance when compared to a calibration method using clear skies (which have a radiance distribution systematically varying from horizon to the near vicinity of the sun). The proposed instrument offers a significantly different basic design compared to

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481

University of Wisconsin - Madison Space Science and Engineering Center Leslie Moy, Lori Borg, Bob Knuteson, Hank Revercomb, Joel Susskind, and Dave Tobin  

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Wisconsin - Madison Wisconsin - Madison Space Science and Engineering Center Leslie Moy, Dave Tobin, Bob Knuteson, Lori Borg, Hank Revercomb (PI), Marty Mlynczak 1 , and Joel Susskind 2 1 NASA Langley, 2 NASA GSFC Assessing ARM Clear Sky BBHRP with CERES and AIRS The RRTM calculations of clear sky OLR agree with CERES observations to ~1 W/m 2 with an uncertainty of ~1 W/m 2 . * True at SGP over 2.5 years, true globally (with some understood regional exceptions) for study day. * True using ARM data as input to RRTM, true using AIRS sounding retrievals as input to RRTM. BBRHP summary report Goal: To assess and improve BBHRP. Approach: Use CERES fluxes & AIRS radiances and retrievals. * SSF CERES is currently a better metric for BBHRP assessment than GOES. * AIRS spectral radiance analysis allows us to evaluate the

482

ARM - Publications: Science Team Meeting Documents  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Using ARM GOES-8 Cloud and TOA Flux Properties to Estimate Surface Using ARM GOES-8 Cloud and TOA Flux Properties to Estimate Surface Radiation Budget Parameters Stackhouse, P.W., Jr. (a), Gupta, S.K. (b), Cox, S.J. (b), Minnis, P. (a), Smith, W.L., Jr. (b), and Khaiyer, M.M. (b), NASA Langley Research Center (a) Analytical Services and Materials, Inc. (b) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The Global Energy and Water Cycle Experiment (GEWEX) Surface Radiation Budget Project (SRB) uses top-of-atmosphere (TOA) radiance measurements and cloud property retrievals to estimate surface fluxes on a global basis. Normally, GEWEX SRB algorithms rely on TOA radiances and cloud information derived from International Satellite Cloud Climatology Project (ISCCP) data. Here, we show first results of using SW and LW algorithms featured in

483

New approach for absolute fluence distribution calculations in Monte Carlo simulations of light propagation in turbid media  

SciTech Connect (OSTI)

A novel way to attain three dimensional fluence rate maps from Monte-Carlo simulations of photon propagation is presented in this work. The propagation of light in a turbid medium is described by the radiative transfer equation and formulated in terms of radiance. For many applications, particularly in biomedical optics, the fluence rate is a more useful quantity and directly derived from the radiance by integrating over all directions. Contrary to the usual way which calculates the fluence rate from absorbed photon power, the fluence rate in this work is directly calculated from the photon packet trajectory. The voxel based algorithm works in arbitrary geometries and material distributions. It is shown that the new algorithm is more efficient and also works in materials with a low or even zero absorption coefficient. The capabilities of the new algorithm are demonstrated on a curved layered structure, where a non-scattering, non-absorbing layer is sandwiched between two highly scattering layers.

Bcklin, Christoph, E-mail: boecklic@ethz.ch; Baumann, Dirk; Frhlich, Jrg [Institute of Electromagnetic Fields, ETH Zurich, 8092 Zurich (Switzerland)

2014-02-14T23:59:59.000Z

484

Temperature and nonlinearity corrections for a photodiode array spectrometer used in the field  

SciTech Connect (OSTI)

Temperature and nonlinearity effects are two important factors that limit the use of photodiode array spectrometers. Usually the spectrometer is calibrated at a known temperature against a reference source of a particular spectral radiance, and then it is used at different temperatures to measure sources of different spectral radiances. These factors are expected to be problematic for nontemperature-stabilized instruments used for in-the-field experiments, where the radiant power of the site changes continuously with the sun tilt. This paper describes the effect of ambient temperature on a nontemperature-stabilized linear photodiode array spectrometer over the temperature range from 5 deg. C to 40 deg. C. The nonlinearity effects on both signal amplification and different levels of radiant power have also been studied and are presented in this paper.

Salim, Saber G. R.; Fox, Nigel P.; Theocharous, Evangelos; Sun, Tong; Grattan, Kenneth T. V.

2011-02-20T23:59:59.000Z

485

Analysis and forecast improvements from simulated satellite water vapor profiles and rainfall using a global data assimilation system  

SciTech Connect (OSTI)

The potential improvements of analyses and forecasts from the use of satellite-observed rainfall and water vapor measurements from the Defense Meteorological Satellite Program Sensor Microwave (SSM) T-1 and T-2 instruments are investigated in a series of observing system simulation experiments using the Air Force Phillips Laboratory (formerly Air Force Geophysics Laboratory) data assimilation system. Simulated SSM radiances are used directly in a radiance retrieval step following the conventional optimum interpolation analysis. Simulated rainfall rates in the tropics are used in a moist initialization procedure to improve the initial specification of divergence, moisture, and temperature. Results show improved analyses and forecasts of relative humidity and winds compared to the control experiment in the tropics and the Southern Hemisphere. Forecast improvements are generally restricted to the first 1-3 days of the forecast. 27 refs., 11 figs.

Nehrkorn, T.; Hoffman, R.N.; Louis, J.F.; Isaacs, R.G.; Moncet, J.L. (Atmospheric and Environmental Research, Inc., Cambridge, MA (United States))

1993-10-01T23:59:59.000Z

486

Cloud Model Evaluation Using Radiometric Measurements from the Airborne Multiangle Imaging Spectroradiometer (AirMISR)  

SciTech Connect (OSTI)

Detailed information on cloud properties is needed to vigorously test retrieval algorithms for satellite and ground-based remote sensors. The inherent complexity of clouds makes this information difficult to obtain from observations alone and cloud resolving models are often used to generating synthetic datasets that can be used as proxies for real data. We test the ability of a cloud resolving model to reproduce cloud structure in a case study of low-level clouds observed by the Earth Observing System (EOS) validation program in north central Oklahoma on March 3, 2000. A three-dimensional radiative transfer model is applied to synthetic cloud properties generated by a high-resolution three-dimensional cloud model in order to simulate the top of atmosphere radiances. These synthetic radiances are then compared with observations from the airborne Multiangle Imaging SpectroRadiometer (AirMISR), flown on the NASA ER-2 high-altitude aircraft.

Ovtchinnikov, Mikhail; Marchand, Roger T.

2007-03-01T23:59:59.000Z

487

Propagation of light in low pressure gas  

E-Print Network [OSTI]

The criticism by W. E. Lamb, W. Schleich, M. Scully, C. Townes of a simplified quantum electrodynamics which represents the photon as a true particle is illustrated. Collisions being absent in low-pressure gas, exchanges of energy are radiative and coherent. Thin shells of plasma containing atoms in a model introduced by Str\\"omgren are superradiant, seen as circles possibly dotted. Spectral radiance of novae has magnitude of laser radiance, and column densities are large in nebulae: Superradiance, multiphoton effects, etc., work in astrophysics. The superradiant beams induce multiphotonic scatterings of light emitted by the stars, brightening the limbs of plasma bubbles and darkening the stars. In excited atomic hydrogen, impulsive Raman scatterings shift frequencies of light. Microwaves exchanged with the Pioneer probes are blueshifted, simulating anomalous accelerations. Substituting coherence for wrong calculations in astrophysical papers, improves results, avoids "new physics".

Jacques Moret-Bailly

2012-04-13T23:59:59.000Z

488

Microsoft PowerPoint - posterRick.ppt [Compatibility Mode]  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Motivation Motivation Derive aerosol optical depth (AOD) and particle size distribution in uniform aerosol layers through inversion of sky radiance observations to complement AOD derived from direct sun observations e.g. CSPHOT, MFRSR, NIMFR. Aerosol Characterization with a Calibrated CCD Sky Imager A. Cazorla 1,2 , R. Wagener 3 , J.E. Shields 4 , F.J. Olmo 1,2 , L. Alados-Arboledas 1,2 1 Departamento de Física Aplicada, Facultad de Ciencias, Universidad de Granada, Spain 2 Centro Andaluz de Medio Ambiente (CEAMA), Junta de Andalucía, Universidad de Granada, Spain 3 Environmental Sciences Dept., Brookhaven National Laboratory, Upton, New York 4 Marine Physical Lab, Scripps Institution of Oceanography, University of California, San Diego cazorla@ugr.es 3. Optical properties Neural network-based models estimate the AOD and the Ångström coefficients using the radiance extracted

489

mayor-98.pdf  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

61 61 Clear-Sky Bidirectional Reflectance Functions Derived from ARM-UAV MPIR Data Over the ARM Southern Great Plains Site S. D. Mayor Analytical Services and Materials, Inc. Hampton, Virginia P. Minnis Atmospheric Sciences Division NASA-Langley Research Center Hampton, Virginia G. S. Phipps Sandia National Laboratories Albuquerque, New Mexico Introduction Bidirectional reflectance distribution functions (BRDFs) quantify the anisotropic reflection of radiation. At the top of the atmosphere, the surface and the atmosphere affect the anisotropy of the reflected solar radiation. BRDFs are essential for deriving albedos from radiances measured by satellites and for predicting the radiance field for a given set of conditions. Measurements of complete BRDFs are difficult to obtain at the top of the atmosphere (TOA).

490

A study of rangeland brush canopy cover using Landsat Multispectral Scanner data  

E-Print Network [OSTI]

has been reported (Pearson and Miller, 1972). Rati oi ng of the two spectral radiance measurements (the biomass ratio) revealed a significantly higher correlation wfth the standing green biomass than correl ati ons using either of the two bands... OF THE REFLECTANCE RATIO OF . 78 MICRONS/. 68 MICRONS (PHOTO IR/RED) VERSUS GREEN CANOPY BIOMASS. The spectral measurements for 24 unu sturbed grassland plots were made using a field spectrometer system. Note the high degree of 1-nearity of the data. (From...

Walthall, Charles Lee

2012-06-07T23:59:59.000Z

491

A balloon-borne aerosol spectrometer for high altitude low aerosol concentration measurements  

SciTech Connect (OSTI)

Funded by Air Force Wright Aeronautical Laboratory, a new balloon-borne high altitude aerosol spectrometer, for the measurement of cirrus cloud ice crystals, has been developed and successfully flown by Sandia National Laboratories and Radiance Research. This report (1) details the aerosol spectrometer design and construction, (2) discusses data transmission and decoding, (3) presents data collected on three Florida flights in tables and plots. 2 refs., 11 figs., 3 tabs.

Brown, G.S. (Sandia National Labs., Albuquerque, NM (USA)); Weiss, R.E. (Radiance Research, Seattle, WA (USA))

1990-08-01T23:59:59.000Z

492

PowerPoint Presentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SWS direct irradiance SWS direct irradiance contamination on the analysis of transition zone between cloudy and cloud-free regions Alexander Marshak (GSFC) and Christine Chiu (UMBC) Cloud-free zenith radiance will be uncontaminated as long as the SWS is not illuminated by directly transmitted solar irradiance Main Assumption SZA=45 o May 18, 2007 0 100 200 300 400 0 125 250 375 time (sec) wvl (nm) 400 800 1200 1600 2000 (nm) wavelength (nm) 0.00 0.20 0.40 0.60 0.80 20070518 Blocked around 400 sec Unblocked from 0 to 380 sec 400 370 340 310 Unblocked illuminated Blocked in shadow 0.04 0.08 0.12 0.16 0.2 0 120 240 360 480 600 720 Time (sec) 870 nm 1640 nm May 18, 2007 Unblocked Blocked Radiance SZA=45 o May 18, 2007 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 400 800 1200 1600 2000 Differnce Normalized radiance Wavelength (nm) I 870 correct = I 870 old - 0.035

493

Radial excitation temperatures and electron number densities in a 9, 27 and 50 \\{MHz\\} inductively-coupled argon plasma  

Science Journals Connector (OSTI)

This work is the result of experiments performed on a 9, 27 and 50 \\{MHz\\} atmospheric pressure argon ICP uing the same thermometric species and instrumentation. Radiation originating from plasma volume with 0.25 mm2 projected areas were measured. The lateral observed spatially integrated radiances were transformed to radial functions by using Abel integral equations. Variations of radiances from Ca atom and ion transitions as function of observation height were studied. Two ion transitions of Ca with sufficient excitation energy difference were chosen for two-line temperature determinations, while substitution of atom to ion radiance ratios into the Saha equation were used in calculating values for the electron number density. The cooling effect of the central penetrating nebulizer gas on the plasma centres was clearly observed through a decrease in the excitation temperatures at the lowest observation heights above the r.f. coils. Experimental evidence indicates a general decrease in excitation temperature with increasing generator frequency. The same tendency was observed for the electron number density. These phenomena are probably due to the variation in skin depth at the different frequencies.

W.H. Gunter; K. Visser; P.B. Zeeman

1983-01-01T23:59:59.000Z

494

Multiangle Observations of Arctic Clouds from FIRE ACE: June 3, 1998 Case Study  

SciTech Connect (OSTI)

In May and June 1998 the Airborne Multiangle Imaging Spectroradiometer (AirMISR) participated in the FIRE Arctic Cloud Experiment (ACE). AirMISR is an airborne instrument for obtaining multiangle imagery similar to that of the satellite-borne MISR instrument. This paper presents a detailed analysis of the data collected on June 3, 1998. In particular, AirMISR radiance measurements are compared with measurements made by two other instruments, the Cloud Absorption Radiometer (CAR) and the MODIS airborne simulator (MAS), as well as to plane-parallel radiative transfer simulations. It is found that the AirMISR radiance measurements and albedo estimates compare favorably both with the other instruments and with the radiative transfer simulations. In addition to radiance and albedo, the multiangle AirMISR data can be used to obtain estimates of cloud top height using stereoimaging techniques. Comparison of AirMISR retrieved cloud top height (using the complete MISR-based stereoimaging approach) shows excellent agreement with the measurements from the airborne Cloud Lidar System (CLS) and ground-based millimeter-wave cloud radar.

Marchand, Roger T.; Ackerman, Thomas P.; King, M. D.; Moroney, C.; Davies, R.; Muller, J.-P. A. L.; Gerber, H.

2001-07-27T23:59:59.000Z

495

Balanced interferometric system for stability measurements  

SciTech Connect (OSTI)

We describe two different, double-sided interferometer designs for measuring material stability. Both designs are balanced interferometers where the only optical path difference is the sample and the reference beams are located within the interferometer. One interferometer is a double-pass design, whereas the other is a single-pass system. Based on a tolerancing analysis, the single-pass system is less susceptible to initial component misalignment and motions during experiments. This single-pass interferometer was tested with an 86 nm thin-film silver sample for both short-term repeatability and long-term stability. In 66 repeatability tests of 30 min each, the mean measured drift rate was less than 1 pm/h rms. In two long-term tests (>9 h), the mean drift rate was less than 1.1 pm/h, which shows good agreement between the short- and long-term measurements. In these experiments, the mean measured length change was 2 nm rms.

Ellis, Jonathan D.; Joo, Ki-Nam; Spronck, Jo W.; Munnig Schmidt, Robert H

2009-03-20T23:59:59.000Z

496

Method and apparatus for measuring surface movement of a solid object that is subjected to external vibrations  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading. 38 figs.

Schultz, T.J.; Kotidis, P.A.; Woodroffe, J.A.; Rostler, P.S.

1995-04-25T23:59:59.000Z

497

Apparatus for measuring surface movement of an object that is subjected to external vibrations  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1997-01-01T23:59:59.000Z

498

Method and apparatus for measuring surface movement of a solid object that is subjected to external vibrations  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1995-01-01T23:59:59.000Z

499

Method and apparatus for measuring surface movement of an object using a polarizing interfeometer  

DOE Patents [OSTI]

A system for non-destructively measuring an object and controlling industrial processes in response to the measurement is disclosed in which an impulse laser generates a plurality of sound waves over timed increments in an object. A polarizing interferometer is used to measure surface movement of the object caused by the sound waves and sensed by phase shifts in the signal beam. A photon multiplier senses the phase shift and develops an electrical signal. A signal conditioning arrangement modifies the electrical signals to generate an average signal correlated to the sound waves which in turn is correlated to a physical or metallurgical property of the object, such as temperature, which property may then be used to control the process. External, random vibrations of the workpiece are utilized to develop discernible signals which can be sensed in the interferometer by only one photon multiplier. In addition the interferometer includes an arrangement for optimizing its sensitivity so that movement attributed to various waves can be detected in opaque objects. The interferometer also includes a mechanism for sensing objects with rough surfaces which produce speckle light patterns. Finally the interferometer per se, with the addition of a second photon multiplier is capable of accurately recording beam length distance differences with only one reading.

Schultz, Thomas J. (Maumee, OH); Kotidis, Petros A. (Waban, MA); Woodroffe, Jaime A. (North Reading, MA); Rostler, Peter S. (Newton, MA)

1995-01-01T23:59:59.000Z

500

Refractive index and absorption detector for liquid chromatography based on Fabry-Perot interferometry  

DOE Patents [OSTI]

A refractive index and absorption detector are disclosed for liquid chromatography. It is based in part on a Fabry-Perot interferometer and is used for the improved detection of refractive index and absorption. It includes a Fabry-Perot interferometer having a normally fixed first partially reflecting mirror and a movable second partially reflecting mirror. A chromatographic flow-cell is positioned between the mirrors along the optical axis of a monochromatic laser beam passing through the interferometer. A means for deriving information about the interference fringes coming out of the interferometer is used with a mini-computer to compute the refractive index of the specimen injected into the flow cell. The minicomputer continuously scans the interferometer for continuous refractive index readings and outputs the continuous results of the scans on a chart recorder. The absorption of the specimen can concurrently be scanned by including a second optical path for an excitation laser which will not interfere with the first laser, but will affect the specimen so that absorption properties can be detected. By first scanning for the refractive index of the specimen, and then immediately adding the excitation laser and subsequently scanning for the refractive index again, the absorption of the specimen can be computed and recorded. 10 figs.

Yeung, E.S.; Woodruff, S.D.

1984-06-19T23:59:59.000Z