Sample records for micropulse lidar mpl

  1. Micropulse Lidar (MPL) Handbook

    SciTech Connect (OSTI)

    Mendoza, A; Flynn, C

    2006-05-01T23:59:59.000Z

    The micropulse lidar (MPL) is a ground-based optical remote sensing system designed primarily to determine the altitude of clouds overhead. The physical principle is the same as for radar. Pulses of energy are transmitted into the atmosphere; the energy scattered back to the transceiver is collected and measured as a time-resolved signal. From the time delay between each outgoing transmitted pulse and the backscattered signal, the distance to the scatterer is infered. Besides real-time detection of clouds, post-processing of the lidar return can also characterize the extent and properties of aerosol or other particle-laden regions.

  2. An Atmospheric Radiation Measurement Value-Added Product to Retrieve Optically Thin Cloud Visible Optical Depth using Micropulse Lidar

    SciTech Connect (OSTI)

    Lo, C; Comstock, JM; Flynn, C

    2006-10-01T23:59:59.000Z

    The purpose of the Micropulse Lidar (MPL) Cloud Optical Depth (MPLCOD) Value-Added Product (VAP) is to retrieve the visible (short-wave) cloud optical depth for optically thin clouds using MPL. The advantage of using the MPL to derive optical depth is that lidar is able to detect optically thin cloud layers that may not be detected by millimeter cloud radar or radiometric techniques. The disadvantage of using lidar to derive optical depth is that the lidar signal becomes attenuation limited when ? approaches 3 (this value can vary depending on instrument specifications). As a result, the lidar will not detect optically thin clouds if an optically thick cloud obstructs the lidar beam.

  3. ARM: ARSCL: cloud boundaries from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

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

    Coulter, Richard; Widener, Kevin; Bharadwaj, Nitin; Johnson, Karen; Martin, Timothy

    ARSCL: cloud boundaries from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

  4. ARM: ARSCL: multiple outputs from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

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

    Coulter, Richard; Widener, Kevin; Bharadwaj, Nitin; Johnson, Karen; Martin, Timothy

    ARSCL: multiple outputs from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

  5. ARM: ARSCL: cloud base height from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

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

    Coulter, Richard; Widener, Kevin; Bharadwaj, Nitin; Johnson, Karen; Martin, Timothy

    ARSCL: cloud base height from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR

  6. A new cloud and aerosol layer detection method based on micropulse lidar measurements

    E-Print Network [OSTI]

    Li, Zhanqing

    A new cloud and aerosol layer detection method based on micropulse lidar measurements Chuanfeng algorithm to detect aerosols and clouds based on micropulse lidar measurements. A semidiscretization is then introduced. Combined with empirical threshold values, we determine if the signal waves indicate clouds

  7. ARM - Evaluation Product - MicroPulse LIDAR Cloud Optical Depth (MPLCOD)

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

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  8. Long-range micro-pulse aerosol lidar at 1.5 um with an up-conversion single-photon detector

    E-Print Network [OSTI]

    Haiyun Xia; Guoliang Shentu; Mingjia Shangguan; Xiuxiu Xia; Xiaodong Jia; Chong Wang; Jun Zhang; Qiang Zhang; Xiankang Dou; Jianwei Pan

    2014-12-09T23:59:59.000Z

    A micro-pulse lidar at eye-safe wavelength is constructed based on an up-conversion single-photon detector. The ultralow noise detector enables using integration technique to improve the signal-to-noise ratio of the atmospheric backscattering even at daytime. With the pulse energy of 110uJ, the pulse repetition rate of 15 kHz, the optical antenna diameter of 100 mm and integration time of 5 minutes, a horizontal detection range of 7 km is realized. In the demonstration experiment, atmospheric visibility over 24 hours is monitored continuously, with results in accordance with the weather forecasts.

  9. Planetary Boundary Layer from AERI and MPL

    SciTech Connect (OSTI)

    Sawyer, Virginia

    2014-02-13T23:59:59.000Z

    The distribution and transport of aerosol emitted to the lower troposphere is governed by the height of the planetary boundary layer (PBL), which limits the dilution of pollutants and influences boundary-layer convection. Because radiative heating and cooling of the surface strongly affect the PBL top height, it follows diurnal and seasonal cycles and may vary by hundreds of meters over a 24-hour period. The cap the PBL imposes on low-level aerosol transport makes aerosol concentration an effective proxy for PBL height: the top of the PBL is marked by a rapid transition from polluted, well-mixed boundary-layer air to the cleaner, more stratified free troposphere. Micropulse lidar (MPL) can provide much higher temporal resolution than radiosonde and better vertical resolution than infrared spectrometer (AERI), but PBL heights from all three instruments at the ARM SGP site are compared to one another for validation. If there is agreement among them, the higher-resolution remote sensing-derived PBL heights can accurately fill in the gaps left by the low frequency of radiosonde launches, and thus improve model parameterizations and our understanding of boundary-layer processes.

  10. Planetary Boundary Layer from AERI and MPL

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

    Sawyer, Virginia

    The distribution and transport of aerosol emitted to the lower troposphere is governed by the height of the planetary boundary layer (PBL), which limits the dilution of pollutants and influences boundary-layer convection. Because radiative heating and cooling of the surface strongly affect the PBL top height, it follows diurnal and seasonal cycles and may vary by hundreds of meters over a 24-hour period. The cap the PBL imposes on low-level aerosol transport makes aerosol concentration an effective proxy for PBL height: the top of the PBL is marked by a rapid transition from polluted, well-mixed boundary-layer air to the cleaner, more stratified free troposphere. Micropulse lidar (MPL) can provide much higher temporal resolution than radiosonde and better vertical resolution than infrared spectrometer (AERI), but PBL heights from all three instruments at the ARM SGP site are compared to one another for validation. If there is agreement among them, the higher-resolution remote sensing-derived PBL heights can accurately fill in the gaps left by the low frequency of radiosonde launches, and thus improve model parameterizations and our understanding of boundary-layer processes.

  11. Cloud Effects on Radiative Heating Rate Profiles over Darwin using ARM and A-train Radar/Lidar Observations

    SciTech Connect (OSTI)

    Thorsen, Tyler J.; Fu, Qiang; Comstock, Jennifer M.

    2013-06-11T23:59:59.000Z

    Observations of clouds from the ground-based U.S. Department of Energy Atmospheric Radiation Measurement program (ARM) and satellite-based A-train are used to compute cloud radiative forcing profiles over the ARM Darwin, Australia site. Cloud properties are obtained from both radar (the ARM Millimeter Cloud Radar (MMCR) and the CloudSat satellite in the A-train) and lidar (the ARM Micropulse lidar (MPL) and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite in the A-train) observations. Cloud microphysical properties are taken from combined radar and lidar retrievals for ice clouds and radar only or lidar only retrievals for liquid clouds. Large, statistically significant differences of up to 1.43 K/day exist between the mean ARM and A-train net cloud radiative forcing profiles. The majority of the difference in cloud radiative forcing profiles is shown to be due to a large difference in the cloud fraction above 12 km. Above this altitude the A-train cloud fraction is significantly larger because more clouds are detected by CALIPSO than by the ground-based MPL. It is shown that the MPL is unable to observe as many high clouds as CALIPSO due to being more frequently attenuated and a poorer sensitivity even in otherwise clear-sky conditions. After accounting for cloud fraction differences and instrument sampling differences due to viewing platform we determined that differences in cloud radiative forcing due to the retrieved ice cloud properties is relatively small. This study demonstrates that A-train observations are better suited for the calculation cloud radiative forcing profiles. In addition, we find that it is necessary to supplement CloudSat with CALIPSO observations to obtain accurate cloud radiative forcing profiles since a large portion of clouds at Darwin are detected by CALIPSO only.

  12. Micropulse Lidar The ARM Program studies

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

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  13. Raman lidar and MPL Measurements during ALIVE

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

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  14. absorption lidar dial: Topics by E-print Network

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

    Topic Index 1 Development of an eye-safe diode-laser-based micro-pulse differential absorption lidar (MP-dial) for atmospheric water-vapor and aerosol studies. Open Access Theses...

  15. MPL

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

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  16. Ge.Meyer -MPL-27.11.002 Status Tunerentwicklung

    E-Print Network [OSTI]

    Ge.Meyer -MPL- 27.11.002 Status Tunerentwicklung 1) Geschichte: Alter franz. Tuner weich, hatte Hysterese. Federkonstante: Gerechnet 5,4 µ/kN, gemessen 26,7 µ/kN (Faktor 5), Ge.Meyer gerechnet 14,6 µ Felder. 2) Tuner 0 / H.Kaiser, Ge.Meyer -MPL- Deshalb wurde ein neues Konzept überlegt. Dieses Konzept

  17. DOE/SC-ARM/TR-098 Micropulse Lidar Cloud Mask Value-Added Product Technical Report

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

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  18. Lidar Investigation of Tropical Nocturnal Boundary Layer Aerosols and Cloud Macrophysics

    SciTech Connect (OSTI)

    Manoj, M. G.; Devara, PC S.; Taraphdar, Sourav

    2013-10-01T23:59:59.000Z

    Observational evidence of two-way association between nocturnal boundary layer aerosols and cloud macrophysical properties under different meteorological conditions is reported in this paper. The study has been conducted during 2008-09 employing a high space-time resolution polarimetric micro-pulse lidar over a tropical urban station in India. Firstly, the study highlights the crucial role of boundary layer aerosols and background meteorology on the formation and structure of low-level stratiform clouds in the backdrop of different atmospheric stability conditions. Turbulent mixing induced by the wind shear at the station, which is associated with a complex terrain, is found to play a pivotal role in the formation and structural evolution of nocturnal boundary layer clouds. Secondly, it is shown that the trapping of energy in the form of outgoing terrestrial radiation by the overlying low-level clouds can enhance the aerosol mixing height associated with the nocturnal boundary layer. To substantiate this, the long-wave heating associated with cloud capping has been quantitatively estimated in an indirect way by employing an Advanced Research Weather Research and Forecasting (WRF-ARW) model version 2.2 developed by National Center for Atmospheric Research (NCAR), Colorado, USA, and supplementary data sets; and differentiated against other heating mechanisms. The present investigation as well establishes the potential of lidar remote-sensing technique in exploring some of the intriguing aspects of the cloud-environment relationship.

  19. Raman Lidar Receives Improvements

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

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  20. Doppler Lidar (DL) Handbook

    SciTech Connect (OSTI)

    Newsom, RK

    2012-02-13T23:59:59.000Z

    The Doppler lidar (DL) is an active remote sensing instrument that provides range- and time-resolved measurements of radial velocity and attenuated backscatter. The principle of operation is similar to radar in that pulses of energy are transmitted into the atmosphere; the energy scattered back to the transceiver is collected and measured as a time-resolved signal. From the time delay between each outgoing transmitted pulse and the backscattered signal, the distance to the scatterer is inferred. The radial or line-of-sight velocity of the scatterers is determined from the Doppler frequency shift of the backscattered radiation. The DL uses a heterodyne detection technique in which the return signal is mixed with a reference laser beam (i.e., local oscillator) of known frequency. An onboard signal processing computer then determines the Doppler frequency shift from the spectra of the heterodyne signal. The energy content of the Doppler spectra can also be used to determine attenuated backscatter.

  1. ARM - Campaign Instrument - mpl

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

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  2. ARM - Datastreams - mpl

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

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  3. ARM - Instrument - mpl

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

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  4. airborne oceanographic lidar: Topics by E-print Network

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

    Channels Landslides Spatial Cognition The emergence of airborne lidar data cognition and perception, we also explore the notion that the ongoing use of lidar enables...

  5. airborne aura lidar: Topics by E-print Network

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

    Channels Landslides Spatial Cognition The emergence of airborne lidar data cognition and perception, we also explore the notion that the ongoing use of lidar enables...

  6. URBAN MODELING FROM LIDAR DATA IN AN INTEGRATED GIS ENVIRONMENT

    E-Print Network [OSTI]

    Shan, Jie

    . In fact, the first satellites carrying lidar sensors, Alissa, Balkan-1, and Balkan-2 are scheduled

  7. NO2 lidar profile measurements for satellite interpretation and validation

    E-Print Network [OSTI]

    Dirksen, Ruud

    NO2 lidar profile measurements for satellite interpretation and validation H. Volten,1 E. J matter. We describe a novel instrument, the RIVM NO2 mobile lidar, to measure tropospheric NO2 profiles collection of lidar NO2 profiles, coinciding with OMI and SCIAMACHY overpasses. On clear days and early

  8. Raman lidar/AERI PBL Height Product

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

    Ferrare, Richard

    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.

  9. LIDAR, Point Clouds, and their Archaeological Applications

    SciTech Connect (OSTI)

    White, Devin A [ORNL

    2013-01-01T23:59:59.000Z

    It is common in contemporary archaeological literature, in papers at archaeological conferences, and in grant proposals to see heritage professionals use the term LIDAR to refer to high spatial resolution digital elevation models and the technology used to produce them. The goal of this chapter is to break that association and introduce archaeologists to the world of point clouds, in which LIDAR is only one member of a larger family of techniques to obtain, visualize, and analyze three-dimensional measurements of archaeological features. After describing how point clouds are constructed, there is a brief discussion on the currently available software and analytical techniques designed to make sense of them.

  10. Systematic Sampling of Scanning Lidar Swaths

    E-Print Network [OSTI]

    Marcell, Wesley Tyler

    2011-02-22T23:59:59.000Z

    of the requirements for the degree of MASTER OF SCIENCE Approved by: Co-Chairs of Committee, Marian Eriksson Sorin Pospescu Committee Members, Cristine Morgan Ross Nelson Head of Department, Steven Whisenant December 2009 Major Subject: Forestry... iii ABSTRACT Systematic Sampling of Scanning Lidar Swaths. (December 2009) Wesley Tyler Marcell, B.S., Texas A&M University Co-Chairs of Advisory Committee: Dr. Marian Eriksson Dr. Sorin...

  11. Lidar techniques for search and rescue

    SciTech Connect (OSTI)

    Cabral, W.L.

    1985-01-01T23:59:59.000Z

    Four techniques for using LIDAR in Search and Rescue Operations will be discussed. The topic will include laser retroreflection, laser-induced fluorescence in the visible, laser-induced fluorescence during daylight hours, and laser-induced fluorescence in the uv. These techniques use high-repetition rate lasers at a variety of frequencies to induce either fluorescence in dye markers or retroreflection from plastic corner cubes on life preservers and other emergency markers.

  12. Ris {R{1127(EN) Lidar data used in the COFIN

    E-Print Network [OSTI]

    3.1 Generation of arti cial smoke 7 4 Data processing 8 4.1 The lidar equation 8 4.2 Backscatter, see below. In FLADIS the smoke were added to an initial heavy gas plume. 2 Experimental design Figures response. However, the Lidar does have a averaging volume due to the leng

  13. Airborne lidar detection and characterization of internal waves in a

    E-Print Network [OSTI]

    Shaw, Joseph A.

    , Graduate School of Oceanography, Narragansett, Rhode Island 02874 Abstract. A dual-polarization lidar though the contrast is low (2%). Combined with the lidar profile, the total energy of the internal wave heating at the surface and/or fresh water input from terrestrial runoff or melting ice create a layer

  14. Validation of Innovative Exploration Technologies for Newberry Volcano: LIDAR of Newberry Volcano 2012

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

    Jaffe, Todd

    Validation of Innovative Exploration Technologies for Newberry Volcano: LIDAR of Newberry Volcano 2012

  15. ARM: 10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    10-second Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  16. ARM: 2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    2-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  17. ARM: 10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

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

    Newsom, Rob; Goldsmith, John

    10-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  18. ARM: 1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    1-minute Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  19. ARM: 1-minute Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    1-minute Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

  20. ARM: 10-minute Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

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

    Newsom, Rob; Goldsmith, John

    10-minute Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

  1. Atmospheric Data, Images, and Animations from Lidar Instruments used by the University of Wisconsin Lidar Group

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

    The Space Science and Engineering Center is a research and development center affiliated with the University of Wisconsin-Madison’s Graduate School. Its primary focus is on geophysical research and technology to enhance understanding of the atmosphere of Earth, the other planets in the Solar System, and the cosmos. SSEC develops new observing tools for spacecraft, aircraft, and ground-based platforms, and models atmospheric phenomena. The Center receives, manages and distributes huge amounts of geophysical data and develops software to visualize and manipulate these data for use by researchers and operational meteorologists all over the world.[Taken from About SSEC at http://www.ssec.wisc.edu/overview/] A huge collection of data products, images, and animations comes to the SSEC from the University of Wisconsin Lidar Group. Contents of this collection include: • An archive of thousands of Lidar images acquired before 2004 • Arctic HSRL, MMCR, PAERI, MWR, Radiosonde, and CRAS forecast data Data after May 1, 2004 • MPEG animations and Lidar Multiple Scattering Models

  2. airborne lidar mapping: Topics by E-print Network

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

    A minimum height of 1 m was applied to define woody understorey. Critical to this process were a Digital Terrain Model (extracted from the leaf-off last return LiDAR data)...

  3. BPA's LiDAR program maps corridor to success

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

    analyzed by BPA's LiDAR program. The animation was produced by Ryan Beck and Drew Thompson in BPA's Geospatial Services group. Sometimes the pace of change is imperceptible,...

  4. A motor drive control system for the Lidar Polarimeter

    E-Print Network [OSTI]

    Leung, Waiming

    1977-01-01T23:59:59.000Z

    A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Submitted to the Graduate College of Texas A/M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCF, May 1977 Major... Subject: Electrical Engineering A MOTOR DRIVE CONTROL SYSTEM FOR THE LIDAR POLARIMETER A Thesis by Waiming Leung Approved as to style and content by: Chairman o Comm' ee ea o epartment Member Mem er May 1977 ABSTRACT A Motor Drive Control...

  5. Simulated performance of an airborne lidar wind shear detection system

    E-Print Network [OSTI]

    Griffith, Kenneth Scott

    1987-01-01T23:59:59.000Z

    SIMULATED PERFORMANCE OF AN AIRBORNE LIDAR WIND SHEAR DETECTION SYSTEM A Thesis by KENNETH SCOTT GRIFFITH Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1987 Major Subject: Physics SIMULATED PERFORMANCE OF AN AIRBORNE LIDAR WIND SHEAR DETECTION SYSTEM A Thesis by KENNETH SCOTT GRIFFITH Approved as to style and content by: e . atta ar (Chair an of Committee) T omas . air, III (Member) ic...

  6. LIDAR Wind Speed Measurements of Evolving Wind Fields

    SciTech Connect (OSTI)

    Simley, E.; Pao, L. Y.

    2012-07-01T23:59:59.000Z

    Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feedforward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. Past studies have assumed Taylor's frozen turbulence hypothesis, which implies that turbulence remains unchanged as it advects downwind at the mean wind speed. With Taylor's hypothesis applied, the only source of wind speed measurement error is distortion caused by the LIDAR. This study introduces wind evolution, characterized by the longitudinal coherence of the wind, to LIDAR measurement simulations to create a more realistic measurement model. A simple model of wind evolution is applied to a frozen wind field used in previous studies to investigate the effects of varying the intensity of wind evolution. LIDAR measurements are also evaluated with a large eddy simulation of a stable boundary layer provided by the National Center for Atmospheric Research. Simulation results show the combined effects of LIDAR errors and wind evolution for realistic turbine-mounted LIDAR measurement scenarios.

  7. PROBING NEAR-SURFACE ATMOSPHERIC TURBULENCE WITH LIDAR MEASUREMENTS AND HIGH-RESOLUTION HYDRODYNAMIC MODELS

    SciTech Connect (OSTI)

    J. KAO; D. COOPER; ET AL

    2000-11-01T23:59:59.000Z

    As lidar technology is able to provide fast data collection at a resolution of meters in an atmospheric volume, it is imperative to promote a modeling counterpart of the lidar capability. This paper describes an integrated capability based on data from a scanning water vapor lidar and a high-resolution hydrodynamic model (HIGRAD) equipped with a visualization routine (VIEWER) that simulates the lidar scanning. The purpose is to better understand the spatial and temporal representativeness of the lidar measurements and, in turn, to extend their utility in studying turbulence fields in the atmospheric boundary layer. Raman lidar water vapor data collected over the Pacific warm pool and the simulations with the HIGRAD code are used for identifying the underlying physics and potential aliasing effects of spatially resolved lidar measurements. This capability also helps improve the trade-off between spatial-temporal resolution and coverage of the lidar measurements.

  8. Geospatial analysis of vulnerable beach-foredune systems from decadal time series of lidar data

    E-Print Network [OSTI]

    Mitasova, Helena

    Geospatial analysis of vulnerable beach-foredune systems from decadal time series of lidar data, Geospatial analysis of vulnerable beach- foredune systems from decadal time series of lidar data, Journal densities; therefore, geospatial analysis, when applied to decadal lidar time series, needs to address

  9. Alternate spatial sampling approaches for ecosystem structure inventory using spaceborne lidar

    E-Print Network [OSTI]

    Lefsky, Michael

    used in aircraft lidar remote sensing where power, heat, and reliability are less of a concern since January 2011 Accepted 29 January 2011 Available online 23 March 2011 Keywords: Lidar Remote sensing Laser collected in transects and should be considered for future lidar remote sensing missions. © 2011 Elsevier

  10. The effect of specular reflection on spaceborne lidar measurements of ice

    E-Print Network [OSTI]

    Hogan, Robin

    Chapter 2 The effect of specular reflection on spaceborne lidar measurements of ice clouds Summary increase in extinction, it can make interpretation of the lidar echo in terms of cloud radiative properties stage which have among their primary aims the global measurement of ice clouds. The NASA Calipso lidar

  11. Comparison of Two Independent LIDAR-Based Pitch Control Designs

    SciTech Connect (OSTI)

    Dunne, F.; Schlipf, D.; Pao, L. Y.

    2012-08-01T23:59:59.000Z

    Two different lidar-based feedforward controllers have previously been designed for the NREL 5 MW wind turbine model under separate studies. Feedforward controller A uses a finite-impulse-response design, with 5 seconds of preview, and three rotating lidar measurements. Feedforward controller B uses a static-gain design, with the preview time defined by the pitch actuator dynamics, a simulation of a real nacelle-based scanning lidar system, and a lowpass filter defined by the lidar configuration. These controllers are now directly compared under the same lidar configuration, in terms of fatigue load reduction, rotor speed regulation, and power capture. The various differences in design choices are discussed and compared. We also compare frequency plots of individual pitch feedforward and collective pitch feedforward load reductions, and we see that individual pitch feedforward is effective mainly at the once-per-revolution and twice-per-revolution frequencies. We also explain how to determine the required preview time by breaking it down into separate parts, and we then compare it to the expected preview time available.

  12. ARM: 10-minute TEMPORARY Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    10-minute TEMPORARY Raman Lidar: aerosol extinction profiles and aerosol optical thickness, from first Ferrare algorithm

  13. ARM: 10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

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

    Sivaraman, Chitra; Flynn, Connor

    10-minute TEMPORARY Raman Lidar: aerosol scattering ratio and backscattering coefficient profiles, from first Ferrare algorithm

  14. Assessment and Optimization of Lidar Measurement Availability for Wind Turbine Control: Preprint

    SciTech Connect (OSTI)

    Davoust, S.; Jehu, A.; Bouillet, M.; Bardon, M.; Vercherin, B.; Scholbrock, A.; Fleming, P.; Wright, A.

    2014-05-01T23:59:59.000Z

    Turbine-mounted lidars provide preview measurements of the incoming wind field. By reducing loads on critical components and increasing the potential power extracted from the wind, the performance of wind turbine controllers can be improved [2]. As a result, integrating a light detection and ranging (lidar) system has the potential to lower the cost of wind energy. This paper presents an evaluation of turbine-mounted lidar availability. Availability is a metric which measures the proportion of time the lidar is producing controller-usable data, and is essential when a wind turbine controller relies on a lidar. To accomplish this, researchers from Avent Lidar Technology and the National Renewable Energy Laboratory first assessed and modeled the effect of extreme atmospheric events. This shows how a multirange lidar delivers measurements for a wide variety of conditions. Second, by using a theoretical approach and conducting an analysis of field feedback, we investigated the effects of the lidar setup on the wind turbine. This helps determine the optimal lidar mounting position at the back of the nacelle, and establishes a relationship between availability, turbine rpm, and lidar sampling time. Lastly, we considered the role of the wind field reconstruction strategies and the turbine controller on the definition and performance of a lidar's measurement availability.

  15. Ris-R-Report LIDAR Wind Speed Measurements from a

    E-Print Network [OSTI]

    the approaching wind fields from this vantage point. Time series of wind speed measurements from the lidar with 50: Time series of the yaw misalignment 67 #12;4 Risø-R-1741(EN) Preface Mikael Rasmussen and Per Hansen is acknowledged for safety supervision of the operation of the NM80 research turbine. The Spin

  16. FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES

    E-Print Network [OSTI]

    Kerekes, John

    FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES J. Kerekes, A. Goodenough, S of monitoring the dynamics and mass balance of glaciers, ice caps, and ice sheets. However, it is also known that ice surfaces can have complex 3-dimensional structure, which can challenge their accurate retrieval

  17. Lidar fluorosensing of mineral oil spills on the sea surface

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    be discriminated from heavy fuel, and from less harmful substances like fish oil or vegetable oil, Fig. 3, whichLidar fluorosensing of mineral oil spills on the sea surface Theo Hengstermann and Rainer Reuter Airborne .fluorosensor measurements over maritime oil spills show that this method enables a sensitive

  18. Raman Lidar Profiles–Temperature (RLPROFTEMP) Value-Added Product

    SciTech Connect (OSTI)

    Newsom, RK; Sivaraman, C; McFarlane, SA

    2012-10-31T23:59:59.000Z

    The purpose of this document is to describe the Raman Lidar Profiles–Temperature (RLPROFTEMP) value-added product (VAP) and the procedures used to derive atmospheric temperature profiles from the raw RL measurements. Sections 2 and 4 describe the input and output variables, respectively. Section 3 discusses the theory behind the measurement and the details of the algorithm, including calibration and overlap correction.

  19. Lidar on the Phoenix mission to Mars James Whiteway,1

    E-Print Network [OSTI]

    Duck, Thomas J.

    Cameron Dickinson,1 Leonce Komguem,1 and Clive Cook1 Received 30 August 2007; revised 9 March 2008 of backscattered laser light from airborne dust and clouds. These observations will be coordinated with solar, and C. Cook (2008), Lidar on the Phoenix mission to Mars, J. Geophys. Res., 113, E00A08, doi:10

  20. absorption lidar performance: Topics by E-print Network

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

    absorption lidar performance First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a...

  1. absorption lidar sensitivity: Topics by E-print Network

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

    absorption lidar sensitivity First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a...

  2. absorption lidar system: Topics by E-print Network

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

    absorption lidar system First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Development of a differential...

  3. INTEGRATED LIDAR & PHOTOGRAMMETRIC DOCUMENTATION OF THE RED GULCH DINOSAUR

    E-Print Network [OSTI]

    Falkingham, Peter

    101 INTEGRATED LIDAR & PHOTOGRAMMETRIC DOCUMENTATION OF THE RED GULCH DINOSAUR TRACKSITE (WYOMING Resource Technology Section, National Operations Center, Bu- reau of Land Management, Bldg. 50 Denver, CO of successful schemes is testament to the advances made in attitudes and approaches to fossil site management

  4. Assessment and Optimization of Lidar Measurement Availability for Wind Turbine Control (Poster)

    SciTech Connect (OSTI)

    Scholbrock, F. A.; Fleming, P.; Wright, A.; Davoust, S.; Jehu, A.; Bouillet, M.; Bardon M.; Vercherin, B.

    2014-02-01T23:59:59.000Z

    Integrating Lidar to improve wind turbine controls is a potential breakthrough for reducing the cost of wind energy. By providing undisturbed wind measurements up to 400m in front of the rotor, Lidar may provide an accurate update of the turbine inflow with a preview time of several seconds. Focusing on loads, several studies have evaluated potential reductions using integrated Lidar, either by simulation or full scale field testing.

  5. SciTech Connect: Field Test Results from Lidar Measured Yaw Control...

    Office of Scientific and Technical Information (OSTI)

    Conference: Field Test Results from Lidar Measured Yaw Control for Improved Yaw Alignment with the NREL Controls Advanced Research Turbine: Preprint Citation Details In-Document...

  6. Structural Analysis of Southern Dixie Valley using LiDAR and...

    Open Energy Info (EERE)

    Structural Analysis of Southern Dixie Valley using LiDAR and Low-Sun-Angle Aerial Photography, NAS Fallon Geothermal Exploration Project, Dixie Valley, Nevada Jump to: navigation,...

  7. Tracking Honey Bees Using LIDAR (Light Detection and Ranging) Technology

    SciTech Connect (OSTI)

    BENDER, SUSAN FAE ANN; RODACY, PHILIP J.; SCHMITT, RANDAL L.; HARGIS JR., PHILIP J.; JOHNSON, MARK S.; KLARKOWSKI, JAMES R.; MAGEE, GLEN I.; BENDER, GARY LEE

    2003-01-01T23:59:59.000Z

    The Defense Advanced Research Projects Agency (DARPA) has recognized that biological and chemical toxins are a real and growing threat to troops, civilians, and the ecosystem. The Explosives Components Facility at Sandia National Laboratories (SNL) has been working with the University of Montana, the Southwest Research Institute, and other agencies to evaluate the feasibility of directing honeybees to specific targets, and for environmental sampling of biological and chemical ''agents of harm''. Recent work has focused on finding and locating buried landmines and unexploded ordnance (UXO). Tests have demonstrated that honeybees can be trained to efficiently and accurately locate explosive signatures in the environment. However, it is difficult to visually track the bees and determine precisely where the targets are located. Video equipment is not practical due to its limited resolution and range. In addition, it is often unsafe to install such equipment in a field. A technology is needed to provide investigators with the standoff capability to track bees and accurately map the location of the suspected targets. This report documents Light Detection and Ranging (LIDAR) tests that were performed by SNL. These tests have shown that a LIDAR system can be used to track honeybees. The LIDAR system can provide both the range and coordinates of the target so that the location of buried munitions can be accurately mapped for subsequent removal.

  8. ARM - Campaign Instrument - mpl-air

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492air Comments? We would love to hear from you! SendgovInstrumentslmwrr-airmiami Comments?

  9. Meenakshi Power Ltd MPL | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant JumpMarysville, Ohio: Energy8429°,

  10. ARM: 10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

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

    Newsom, Rob; Goldsmith, John

    10-minute Raman Lidar: aerosol depolarization profiles and single layer cloud optical depths from first Turner algorithm

  11. URBAN AEROSOLS SURVEY USING LIDAR AND NUMERICAL MODEL S. GEFFROY1

    E-Print Network [OSTI]

    Boyer, Edmond

    URBAN AEROSOLS SURVEY USING LIDAR AND NUMERICAL MODEL S. GEFFROY1 , L. SOULHAC2 , E. FREJAFON3 , R technologique ALATA BP2, F-60550 Verneuil-en-Halatte, France. Keywords: LIDAR, URBAN AEROSOLS, MODEL, IMPACT SURVEY. INTRODUCTION The impact of particulate matters and aerosols on environment and on radiative

  12. Turbine Reliability and Operability Optimization through the use of Direct Detection Lidar Final Technical Report

    SciTech Connect (OSTI)

    Johnson, David K; Lewis, Matthew J; Pavlich, Jane C; Wright, Alan D; Johnson, Kathryn E; Pace, Andrew M

    2013-02-01T23:59:59.000Z

    The goal of this Department of Energy (DOE) project is to increase wind turbine efficiency and reliability with the use of a Light Detection and Ranging (LIDAR) system. The LIDAR provides wind speed and direction data that can be used to help mitigate the fatigue stress on the turbine blades and internal components caused by wind gusts, sub-optimal pointing and reactionary speed or RPM changes. This effort will have a significant impact on the operation and maintenance costs of turbines across the industry. During the course of the project, Michigan Aerospace Corporation (MAC) modified and tested a prototype direct detection wind LIDAR instrument; the resulting LIDAR design considered all aspects of wind turbine LIDAR operation from mounting, assembly, and environmental operating conditions to laser safety. Additionally, in co-operation with our partners, the National Renewable Energy Lab and the Colorado School of Mines, progress was made in LIDAR performance modeling as well as LIDAR feed forward control system modeling and simulation. The results of this investigation showed that using LIDAR measurements to change between baseline and extreme event controllers in a switching architecture can reduce damage equivalent loads on blades and tower, and produce higher mean power output due to fewer overspeed events. This DOE project has led to continued venture capital investment and engagement with leading turbine OEMs, wind farm developers, and wind farm owner/operators.

  13. A technique for autocalibration of cloud lidar EWAN J. O'CONNOR

    E-Print Network [OSTI]

    Hogan, Robin

    The lidar return backscattered from clouds is a power- ful tool in the remote sensing of clouds (e.g. Platt signal from the atmosphere (e.g. Fernald et al., 1972; Platt, 1973). To detect molecular backscatter. The integrated backscatter is equal to the reciprocal of twice the lidar ra- tio (Platt, 1979

  14. Geospatial revolution and remote sensing LiDAR in Mesoamerican archaeology

    E-Print Network [OSTI]

    Weishampel, John F.

    #12;Geospatial revolution and remote sensing LiDAR in Mesoamerican archaeology Arlen F. Chasea,1. The impor- tance of this geospatial innovation is demonstrated with newly acquired LiDAR data from in the remote geospatial imaging of cultural landscapes, including ancient communities and their anthropogenic

  15. BUILDING ROOF SEGMENTATION AND RECONSTRUCTION FROM LIDAR POINT CLOUDS USING CLUSTERING TECHNIQUES

    E-Print Network [OSTI]

    Shan, Jie

    BUILDING ROOF SEGMENTATION AND RECONSTRUCTION FROM LIDAR POINT CLOUDS USING CLUSTERING TECHNIQUES presents an approach to creating a polyhedral model of building roof from LiDAR point clouds using. The normal vectors are then clustered together to determine the principal directions of the roof planes

  16. 3-D tomographic imaging of ocean mines from real and simulated lidar returns

    E-Print Network [OSTI]

    Singer, Andrew C

    3-D tomographic imaging of ocean mines from real and simulated lidar returns Nail C¸adalli, Peter J of underwater objects, where the trans- mitted laser beam can penetrate the air-water interface and illuminate by using an accurate statistical model that incorporates multiple scattering. Keywords: lidar, ocean optics

  17. Complete Residential Urban Area Reconstruction from Dense Aerial LiDAR Point Clouds

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Complete Residential Urban Area Reconstruction from Dense Aerial LiDAR Point Clouds Qian-Yi Zhou area modeling and residential area modeling is that the latter usually con- tains rich vegetation. Thus representing the 3D urban reality of residential areas. Keywords: urban modeling, LiDAR, residential area

  18. Modeling Residential Urban Areas from Dense Aerial LiDAR Point Clouds

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Modeling Residential Urban Areas from Dense Aerial LiDAR Point Clouds Qian-Yi Zhou and Ulrich models for residential areas from aerial LiDAR scans. The key differ- ence between downtown area modeling and residential area modeling is that the latter usually contains rich vegetation. Thus, we propose a robust

  19. Use of a lidar forward model for global comparisons of cloud fraction

    E-Print Network [OSTI]

    Hogan, Robin

    555 Use of a lidar forward model for global comparisons of cloud fraction between the ICESat lidar in extinction-to-backscatter ratio and effective radius affect the forward modeled mean cloud fraction by no more than 10%. 1. Introduction Clouds play a major role in the Earth's radiation budget and predictions

  20. ARM - Field Campaign - Aerosol Lidar Validation Experiment - ALIVE

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032)8Li (59AJ76)ARM2, 2006ObservationsInfraredgovCampaignsAerosol Lidar

  1. ARM - Field Campaign - M-PACE - Polarization Diversity Lidar (PDL)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACE Website ARM Data Discovery

  2. ARM - Field Campaign - M-PACE HSR Lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACE Website ARM Data DiscoveryHSR

  3. Using CO2 Lidar for Standoff Detection of a Perfluorocarbon Tracer in Air

    SciTech Connect (OSTI)

    Heiser,J.H.; Smith, S.; Sedlacek, A.

    2008-02-06T23:59:59.000Z

    The Tag, Track and Location System Program (TTL) is investigating the use of PFTs as tracers for tagging and tracking items of interest or fallen soldiers. In order for the tagging and tracking to be valuable there must be a location system that can detect the PFTs. This report details the development of an infrared lidar platform for standoff detection of PFTs released into the air from a tagged object or person. Furthering work performed using a table top lidar system in an indoor environment; a mobile mini lidar platform was assembled using an existing Raman lidar platform, a grating tunable CO{sub 2} IR laser, Judson HgCdTe detector and miscellaneous folding optics and electronics. The lidar achieved {approx}200 ppb-m sensitivity in laboratory and indoor testing and was then successfully demonstrated at an outdoor test. The lidar system was able to detect PFTs released into a vehicle from a distance of 100 meters. In its final, fully optimized configuration the lidar was capable of repeatedly detecting PFTs in the air released from tagged vehicles. Responses were immediate and clear. This report details the results of a proof-of-concept demonstration for standoff detection of a perfluorocarbon tracer (PFT) using infrared lidar. The project is part of the Tag, Track and Location System Program and was performed under a contract with Tracer Detection Technology Corp. with funding from the Office of Naval Research. A lidar capable of detecting PFT releases at distance was assembled by modifying an existing Raman lidar platform by incorporating a grating tunable CO{sub 2} IR laser, Judson HgCdTe detector and miscellaneous folding optics and electronics. The lidar achieved {approx}200 ppb-m sensitivity in laboratory and indoor testing and was successfully demonstrated at an outdoor test. The demonstration test (scripted by the sponsor) consisted of three parked cars, two of which were tagged with the PFT. The cars were located 70 (closest) to 100 meters (farthest) from the lidar (the lidar beam path was limited by site constraints and was {approx}100 meters). When one door of each of the cars was opened (sequentially), the lidar was clearly able to determine which vehicles had been tagged and which one was not. The lidar is probably capable of greater than 0.5 kilometer standoff distances based on the extreme amount of signal return achieved (so much that the system had to be de-tuned). The BNL lidar system, while optimized to the extent possible with available parts and budget, was not as sensitive as it could be. Steps to improve the lidar are detailed in this report and include using a better laser system (for more stable power output), dual wavelengths (to improve the sensitivity and allow common mode noise reduction and to allow the use of the lidar in a scanning configuration), heterodyning (for range resolved PFT detection) and an off-axis optical configuration (for improved near field sensitivity).

  4. Complex-optical-field lidar system for range and vector velocity measurement

    E-Print Network [OSTI]

    Gao, Shuang; Sullivan, Maurice O.; Hui, Rongqing

    2012-11-01T23:59:59.000Z

    Complex-optical-field lidar system for range and vector velocity measurement Shuang Gao,1,2 Maurice O’Sullivan,3 and Rongqing Hui2,* 1Department of Electronic Engineering and Information Science, University of Science and Technology of China... lidar system based on the measurement of complex optical field is demonstrated for the first time. An electro-optic in- phase/quadrature (I/Q) modulator is used in the lidar transmitter to realize carrier-suppressed complex optical field modulation...

  5. Development of a lidar polarimeter technique of measuring suspended solids in water

    E-Print Network [OSTI]

    Presley, David W

    1980-01-01T23:59:59.000Z

    of depolarization would indicate the relative concentration of scattering particles. The laboratory measurements supported the hypothesis and established the potential of measuri ng suspended solids, turbi dity and transmi ssi vi ty using a lidar polarimeter...

  6. Fully automatic calibration of LIDAR and video streams from a vehicle

    E-Print Network [OSTI]

    Bileschi, Stanley M.

    This work describes a fully automatic technique to calibrate a geometric mapping between lidar and video feeds on a mobile ground-based platform. This data association is a crucial first step for any multi-modal scene ...

  7. Studying Clouds and Aerosols with Lidar Depolarization Ratio and Backscatter Relationships

    E-Print Network [OSTI]

    Cho, Hyoun-Myoung

    2012-02-14T23:59:59.000Z

    comparison of mineral dust aerosol retrievals from two instruments, MODIS and CALIPSO lidar. And, we implement and evaluate a new mineral dust detection algorithm based on the analysis of thin dust radiative signature. In comparison, three commonly used...

  8. Accessing the Energy Department’s Lidar Buoy Data off Virginia Beach

    Broader source: Energy.gov [DOE]

    In December 2014, Pacific Northwest National Laboratory (PNNL) deployed the Energy Department’s floating lidar buoy off of Virginia Beach, Virginia, in less than 30 meters (m) of water,...

  9. Assessing Available Woody Plant Biomass on Rangelands with Lidar and Multispectral Remote Sensing

    E-Print Network [OSTI]

    Ku, Nian-Wei

    2012-07-16T23:59:59.000Z

    ASSESSING AVAILABLE WOODY PLANT BIOMASS ON RANGELANDS WITH LIDAR AND MULTISPECTRAL REMOTE SENSING A Thesis by NIAN-WEI KU Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... ASSESSING AVAILABLE WOODY PLANT BIOMASS ON RANGELANDS WITH LIDAR AND MULTISPECTRAL REMOTE SENSING A Thesis by NIAN-WEI KU Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  10. Algorithms and Software Tools for Extracting Coastal Morphological Information from Airborne LiDAR Data

    E-Print Network [OSTI]

    Gao, Yige

    2010-07-14T23:59:59.000Z

    ALGORITHMS AND SOFTWARE TOOLS FOR EXTRACTING COASTAL MORPHOLOGICAL INFORMATION FROM AIRBORNE LiDAR DATA A Thesis by YIGE GAO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 2009 Major Subject: Geography ALGORITHMS AND SOFTWARE TOOLS FOR EXTRACTING COASTAL MORPHOLOGICAL INFORMATION FROM AIRBORNE LiDAR DATA A Thesis by YIGE GAO...

  11. Retrieval of Urban Boundary Layer Structures from Doppler Lidar Data. Part I: Accuracy Assessment

    SciTech Connect (OSTI)

    Xia, Quanxin; Lin, Ching Long; Calhoun, Ron; Newsom, Rob K.

    2008-01-01T23:59:59.000Z

    Two coherent Doppler lidars from the US Army Research Laboratory (ARL) and Arizona State University (ASU) were deployed in the Joint Urban 2003 atmospheric dispersion field experiment (JU2003) held in Oklahoma City. The dual lidar data are used to evaluate the accuracy of the four-dimensional variational data assimilation (4DVAR) method and identify the coherent flow structures in the urban boundary layer. The objectives of the study are three-fold. The first objective is to examine the effect of eddy viscosity models on the quality of retrieved velocity data. The second objective is to determine the fidelity of single-lidar 4DVAR and evaluate the difference between single- and dual-lidar retrievals. The third objective is to correlate the retrieved flow structures with the ground building data. It is found that the approach of treating eddy viscosity as part of control variables yields better results than the approach of prescribing viscosity. The ARL single-lidar 4DVAR is able to retrieve radial velocity fields with an accuracy of 98% in the along-beam direction and 80-90% in the cross-beam direction. For the dual-lidar 4DVAR, the accuracy of retrieved radial velocity in the ARL cross-beam direction improves to 90-94%. By using the dual-lidar retrieved data as a reference, the single-lidar 4DVAR is able to recover fluctuating velocity fields with 70-80% accuracy in the along-beam direction and 60-70% accuracy in the cross-beam direction. Large-scale convective roll structures are found in the vicinity of downtown airpark and parks. Vortical structures are identified near the business district. Strong updrafts and downdrafts are also found above a cluster of restaurants.

  12. Simple Doppler Wind Lidar adaptive observation experiments with 3D-Var and an ensemble Kalman filter in a global primitive equations model

    E-Print Network [OSTI]

    Maryland at College Park, University of

    the next few years, the first Doppler Wind Lidar (DWL) will be deployed in space by the European Space1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Simple Doppler Wind Lidar adaptive Experiments, we compare several adaptive observation strategies designed to subsample Doppler Wind Lidar (DWL

  13. The effect of specular reflection on spaceborne lidar measurements of ice clouds ROBIN J. HOGAN # AND ANTHONY J. ILLINGWORTH

    E-Print Network [OSTI]

    Hogan, Robin

    The effect of specular reflection on spaceborne lidar measurements of ice clouds ROBIN J. HOGAN echo in terms of cloud radiative properties problematic, so is of concern for spaceborne cloud lidar which have among their primary aims the global measurement of ice clouds. The NASA Calipso li­ dar

  14. Remote control and telescope auto-alignment system for multiangle LIDAR under development at CEILAP, Argentina

    E-Print Network [OSTI]

    Pallotta, Juan; Otero, Lidia; Chouza, Fernando; Raul, Delia; Gonzalez, Francisco; Etchegoyen, Alberto; Quel, Eduardo

    2013-01-01T23:59:59.000Z

    At CEILAP (CITEDEF-CONICET), a multiangle LIDAR is under development to monitor aerosol extinction coefficients in the frame of the CTA (Cherenkov Telescope Array) Project. This is an initiative to build the next generation of ground-based instruments to collect very high energy gamma-ray radiation (>10 GeV). The atmospheric conditions are very important for CTA observations, and LIDARs play an important role in the measurement of the aerosol optical depth at any direction. The LIDAR being developed at CEILAP was conceived to operate in harsh environmental conditions during the shifts, and these working conditions may produce misalignments. To minimize these effects, the telescopes comprising the reception unit are controlled by a self-alignment system. This paper describes the self-alignment method and hardware automation.

  15. Cirrus cloud-temperature interactions over a tropical station, Gadanki from lidar and satellite observations

    SciTech Connect (OSTI)

    S, Motty G, E-mail: mottygs@gmail.com; Satyanarayana, M., E-mail: mottygs@gmail.com; Krishnakumar, V., E-mail: mottygs@gmail.com; Dhaman, Reji k., E-mail: mottygs@gmail.com [Department of Optoelectronics, University of Kerala, Kariavattom, Trivandrum-695 581, Kerala (India)

    2014-10-15T23:59:59.000Z

    The cirrus clouds play an important role in the radiation budget of the earth's atmospheric system and are important to characterize their vertical structure and optical properties. LIDAR measurements are obtained from the tropical station Gadanki (13.5{sup 0} N, 79.2{sup 0} E), India, and meteorological indicators derived from Radiosonde data. Most of the cirrus clouds are observed near to the tropopause, which substantiates the strength of the tropical convective processes. The height and temperature dependencies of cloud height, optical depth, and depolarization ratio were investigated. Cirrus observations made using CALIPSO satellite are compared with lidar data for systematic statistical study of cirrus climatology.

  16. Impact Assessment of Simulated Doppler Wind Lidars with a Multivariate Variational Assimilation in the Tropics

    E-Print Network [OSTI]

    Stoffelen, Ad

    forecast errors of the European Centre for Medium-Range Weather Forecasts (ECMWF) model. Tropical mass­windImpact Assessment of Simulated Doppler Wind Lidars with a Multivariate Variational Assimilation, De Bilt, Netherlands CHRISTOPHE ACCADIA AND PETER SCHL�SSEL European Organisation

  17. Lidars in Wind Energy Jakob Mann, Ferhat Bingl, Torben Mikkelsen, Ioannis Antoniou, Mike

    E-Print Network [OSTI]

    Lidars in Wind Energy Jakob Mann, Ferhat Bingöl, Torben Mikkelsen, Ioannis Antoniou, Mike Courtney, Gunner Larsen, Ebba Dellwik Juan Jose Trujillo* and Hans E. Jørgensen Wind Energy Department Risø of the presentation · Introduction to wind energy · Accurate profiles of the mean wind speed · Wakes behind turbines

  18. Master thesis: "Validation of wake-simulation models based on long-range lidar measurements."

    E-Print Network [OSTI]

    Peinke, Joachim

    REpower 6M wind turbines with rotor blades of different designs installed in the Ellhöft/Westre wind farm developed by the wind turbine manufacturer. Work plan 2011 2012 Task 11 12 01 02 03 04 05 06 07 08 09 10 Figure 1: Simulation of lidar measurements in the wake of a wind turbine using a LES generated wind field

  19. Biomass and Bioenergy 31 (2007) 646655 Estimating biomass of individual pine trees using airborne lidar

    E-Print Network [OSTI]

    2007-01-01T23:59:59.000Z

    Biomass and Bioenergy 31 (2007) 646­655 Estimating biomass of individual pine trees using airborne biomass and bio-energy feedstocks. The overall goal of this study was to develop a method for assessing aboveground biomass and component biomass for individual trees using airborne lidar data in forest settings

  20. Upstream Measurements of Wind Profiles with Doppler Lidar for Improved Wind Energy Integration

    SciTech Connect (OSTI)

    Rodney Frehlich

    2012-10-30T23:59:59.000Z

    New upstream measurements of wind profiles over the altitude range of wind turbines will be produced using a scanning Doppler lidar. These long range high quality measurements will provide improved wind power forecasts for wind energy integration into the power grid. The main goal of the project is to develop the optimal Doppler lidar operating parameters and data processing algorithms for improved wind energy integration by enhancing the wind power forecasts in the 30 to 60 minute time frame, especially for the large wind power ramps. Currently, there is very little upstream data at large wind farms, especially accurate wind profiles over the full height of the turbine blades. The potential of scanning Doppler lidar will be determined by rigorous computer modeling and evaluation of actual Doppler lidar data from the WindTracer system produced by Lockheed Martin Coherent Technologies, Inc. of Louisville, Colorado. Various data products will be investigated for input into numerical weather prediction models and statistically based nowcasting algorithms. Successful implementation of the proposed research will provide the required information for a full cost benefit analysis of the improved forecasts of wind power for energy integration as well as the added benefit of high quality wind and turbulence information for optimal control of the wind turbines at large wind farms.

  1. Surface-Layer Wind and Turbulence Profiling from LIDAR: Theory and Measurements

    E-Print Network [OSTI]

    Surface-Layer Wind and Turbulence Profiling from LIDAR: Theory and Measurements Régis DANIELIAN (Vestas Wind System) Hans Ejsing JØRGENSEN (Wind Energy Department, Risø. Contact: haej@risoe.dk) Torben MIKKELSEN (Wind Energy Department, Risø. Contact: tomi@risoe.dk) Jacob MANN (Wind Energy Department, Risø

  2. Remote sensing the wind using Lidars and Sodars Ioannis Antoniou (1)

    E-Print Network [OSTI]

    masts for their mounting and the costs associated with the purchase, erection and instrumentation for wind energy applications. The first reason is that the cost (purchase, erection, instrumentation with power curve and resource assessment measurements. Both SODAR (SOund Detection And Ranging) and LIDAR

  3. LIDAR OBSERVATIONS AND COMPARISON WITH NUMERICAL SIMULATION OF A LAKE MICHIGAN LAND BREEZE FRONT

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    of the Lake-Induced Convection Experiments (Lake-ICE), on December 21, 1997 the University of Wisconsin VolumeLIDAR OBSERVATIONS AND COMPARISON WITH NUMERICAL SIMULATION OF A LAKE MICHIGAN LAND BREEZE FRONT G circulation over Lake Michigan. Backscatter returns revealed a steady offshore flow extending 1.5 to 4 km

  4. Bistatic receiver model for airborne lidar returns incident on an imaging array from underwater objects

    E-Print Network [OSTI]

    Singer, Andrew C

    returns from the surrounding water medium and ocean bottom. Our results provide a generalization ocean lidar return, obtained by a CCD array. © 2002 Optical Society of America OCIS codes: 010.3640, 030 a laser to generate a short, high-powered pulse of light. The transmitted laser beam can penetrate the air

  5. Topographic accuracy assessment of bare earth lidar-derived unstructured meshes Matthew V. Bilskie

    E-Print Network [OSTI]

    Central Florida, University of

    : Shallow water equations Unstructured mesh Lidar DEM Storm surge Accuracy a b s t r a c t This study water equations model. A methodology is developed to compute root mean square error (RMSE) and the 95th, urban regions, etc.) and have coarse mesh resolution in areas outside the focus region (e.g. deep water

  6. Master Thesis: Dual-Doppler technique applied to scanning lidars for the characterization of

    E-Print Network [OSTI]

    Peinke, Joachim

    -lidar system was developed and installed at the offshore wind farm "alpha ventus". This system includes three and wind turbine wakes in large wind farms offshore. Wind Energy, 12(5):431­444, 2009. [2] Brian Hirth, D of multiple wakes in a wind farm M. van Dooren Supervisors: D. Trabucchi, K. S. Hansen University

  7. Detailed Hydrographic Feature Extraction from High-Resolution LiDAR Data

    SciTech Connect (OSTI)

    Danny L. Anderson

    2012-05-01T23:59:59.000Z

    Detailed hydrographic feature extraction from high-resolution light detection and ranging (LiDAR) data is investigated. Methods for quantitatively evaluating and comparing such extractions are presented, including the use of sinuosity and longitudinal root-mean-square-error (LRMSE). These metrics are then used to quantitatively compare stream networks in two studies. The first study examines the effect of raster cell size on watershed boundaries and stream networks delineated from LiDAR-derived digital elevation models (DEMs). The study confirmed that, with the greatly increased resolution of LiDAR data, smaller cell sizes generally yielded better stream network delineations, based on sinuosity and LRMSE. The second study demonstrates a new method of delineating a stream directly from LiDAR point clouds, without the intermediate step of deriving a DEM. Direct use of LiDAR point clouds could improve efficiency and accuracy of hydrographic feature extractions. The direct delineation method developed herein and termed “mDn”, is an extension of the D8 method that has been used for several decades with gridded raster data. The method divides the region around a starting point into sectors, using the LiDAR data points within each sector to determine an average slope, and selecting the sector with the greatest downward slope to determine the direction of flow. An mDn delineation was compared with a traditional grid-based delineation, using TauDEM, and other readily available, common stream data sets. Although, the TauDEM delineation yielded a sinuosity that more closely matches the reference, the mDn delineation yielded a sinuosity that was higher than either the TauDEM method or the existing published stream delineations. Furthermore, stream delineation using the mDn method yielded the smallest LRMSE.

  8. Workshop: Dados SAR e LIDAR para Anlise de Parmetros Biofsicos e de Estrutura Vertical de Tipologias Florestais (SAR and LIDAR Data for the Analysis of Biophysical Parameters and Vertical Structure from Forest Typologies)

    E-Print Network [OSTI]

    forests, allowing the optimized planning and operational management of forest resources. Microwave, Brazil) 10:45h Design and Implementation of Lidar & Radar Surveys for Forest Carbon Monitoring in REDD

  9. Method to determine and adjust the alignment of the transmitter and receiver fields of view of a LIDAR system

    DOE Patents [OSTI]

    Schmitt, Randal L. (Tijeras, NM); Henson, Tammy D. (Albuquerque, NM); Krumel, Leslie J. (Cedar Crest, NM); Hargis, Jr., Philip J. (Albuquerque, NM)

    2006-06-20T23:59:59.000Z

    A method to determine the alignment of the transmitter and receiver fields of view of a light detection and ranging (LIDAR) system. This method can be employed to determine the far-field intensity distribution of the transmitter beam, as well as the variations in transmitted laser beam pointing as a function of time, temperature, or other environmental variables that may affect the co-alignment of the LIDAR system components. In order to achieve proper alignment of the transmitter and receiver optical systems when a LIDAR system is being used in the field, this method employs a laser-beam-position-sensing detector as an integral part of the receiver optics of the LIDAR system.

  10. Field Test Results of Using a Nacelle-Mounted Lidar for Improving Wind Energy Capture by Reducing Yaw Misalignment (Presentation)

    SciTech Connect (OSTI)

    Fleming, P.; Scholbrock, A.; Wright, A.

    2014-11-01T23:59:59.000Z

    Presented at the Nordic Wind Power Conference on November 5, 2014. This presentation describes field-test campaigns performed at the National Wind Technology Center in which lidar technology was used to improve the yaw alignment of the Controls Advanced Research Turbine (CART) 2 and CART3 wind turbines. The campaigns demonstrated that whether by learning a correction function to the nacelle vane, or by controlling yaw directly with the lidar signal, a significant improvement in power capture was demonstrated.

  11. Comments on ''Accuracy of Raman lidar water vapor calibration and its applicability to long-term measurements''

    SciTech Connect (OSTI)

    Whiteman, David N.; Venable, Demetrius; Landulfo, Eduardo

    2011-05-20T23:59:59.000Z

    In a recent publication, Leblanc and McDermid [Appl. Opt., 47, 5592 (2008)]APOPAI0003-693510.1364/AO.47.005592 proposed a hybrid calibration technique for Raman water vapor lidar involving a tungsten lamp and radiosondes. Measurements made with the lidar telescope viewing the calibration lamp were used to stabilize the lidar calibration determined by comparison with radiosonde. The technique provided a significantly more stable calibration constant than radiosondes used alone. The technique involves the use of a calibration lamp in a fixed position in front of the lidar receiver aperture. We examine this configuration and find that such a configuration likely does not properly sample the full lidar system optical efficiency. While the technique is a useful addition to the use of radiosondes alone for lidar calibration, it is important to understand the scenarios under which it will not provide an accurate quantification of system optical efficiency changes. We offer examples of these scenarios. Scanning of the full telescope aperture with the calibration lamp can circumvent most of these limitations. Based on the work done to date, it seems likely that the use of multiple calibration lamps in different fixed positions in front of the telescope may provide sufficient redundancy for long-term calibration needs. Further full-aperture scanning experiments, performed over an extended period of time, are needed to determine a ''best practice'' for the use of multiple calibration lamps in the hybrid technique.

  12. OAK 270 - The use of Lidar/radiometer (LIRAD) in the ARM program to obtain optical properties and microphysics of high and midlevel clouds

    SciTech Connect (OSTI)

    C.M.R. Platt; R.T. Austin; S.A. Young; and G.L. Stephens

    2002-12-13T23:59:59.000Z

    OAK 270 - The use of Lidar/Radiometer (LIRAD) in the ARM program to obtain optical properties and microphysics of high and midlevel clouds

  13. Scientific investigations planned for the lidar in-space technology experiment (LITE)

    SciTech Connect (OSTI)

    McCormick, M.P.; Winker, D.M.; Browell, E.V. (NASA/Langley Research Center, Hampton, VA (United States)); Coakley, J.A. (Oregon State Univ., Corvallis (United States)); Gardner, C.S. (Univ. of Illinois, Urbana (United States)); Hoff, R.M. (Center for Atmospheric Research Experiments, Egbert, Ontario (Canada)); Kent, G.S. (Science and Technology Corp., Hampton, VA (United States)); Melfi, S.H. (NASA/Goddard Space Flight Center, Greenbelt, MD (United States)); Menzies, R.T. (Jet Propulsion Lab., Pasadena, CA (United States)); Platt, C.M.R. (CSIRO, Aspendale, Victoria (Australia)); Randall, D.A. (Colorado State Univ., Fort Collins (United States)); Reagan, J.A. (Univ. of Arizona, Tucson (United States))

    1993-02-01T23:59:59.000Z

    The Lidar In-Space Technology Experiment (LITE) is being developed by NASA/Langley Research Center for a series off lights on the space shuttle beginning in 1994. Employing a three-wave-length ND:YAG laser and a 1-m-diameter telescope, the system is a test-bed for the development of technology required for future operational spaceborne lidars. The system has been designed to observe clouds, tropospheric and stratospheric aerosols, characteristics of the planetary boundary layer, and stratospheric density and temperature perturbations with much greater resolution than is available from current orbiting sensors. In addition to providing unique datasets on these phenomena, the data obtained will be useful in improving retrieval algorithms currently in use. Observations of clouds and the planetary boundary layer will aid in the development of global climate model (GCM) parameterizations. This article briefly describes the LITE program and discusses the types of scientific investigations planned for the first flight.

  14. Three dimensional winds: A maximum cross-correlation application to elastic lidar data

    SciTech Connect (OSTI)

    Buttler, W.T.

    1996-05-01T23:59:59.000Z

    Maximum cross-correlation techniques have been used with satellite data to estimate winds and sea surface velocities for several years. Los Alamos National Laboratory (LANL) is currently using a variation of the basic maximum cross-correlation technique, coupled with a deterministic application of a vector median filter, to measure transverse winds as a function of range and altitude from incoherent elastic backscatter lidar (light detection and ranging) data taken throughout large volumes within the atmospheric boundary layer. Hourly representations of three-dimensional wind fields, derived from elastic lidar data taken during an air-quality study performed in a region of complex terrain near Sunland Park, New Mexico, are presented and compared with results from an Environmental Protection Agency (EPA) approved laser doppler velocimeter. The wind fields showed persistent large scale eddies as well as general terrain-following winds in the Rio Grande valley.

  15. The Experimental Cloud Lidar Pilot Study (ECLIPS) for cloud-radiation research

    SciTech Connect (OSTI)

    Platt, C.M.; Young, S.A. [Division of Atmospheric Research, Victoria (Australia)] [Division of Atmospheric Research, Victoria (Australia); Carswell, A.I.; Pal, S.R. [York Univ., North York, Ontario (Canada)] [York Univ., North York, Ontario (Canada); McCormick, M.P.; Winker, D.M. [NASA Langley Research Center, Hampton, VA (United States)] [NASA Langley Research Center, Hampton, VA (United States); DelGuasta, M.; Stefanutti, L. [Institute Ricerca Onde Elettromagnetiche, Florence (Italy)] [Institute Ricerca Onde Elettromagnetiche, Florence (Italy); Eberhard, W.L.; Hardesty, M. [NOAA Environmental Technology Lab., Boulder, CO (United States)] [and others] [NOAA Environmental Technology Lab., Boulder, CO (United States); and others

    1994-09-01T23:59:59.000Z

    The Experimental Cloud Lidar Pilot Study (ECLIPS) was initiated to obtain statistics on cloud-base height, extinction, optical depth, cloud brokenness, and surface fluxes. Two observational phases have taken place, in October-December 1989 and April-July 1991, with intensive 30-day periods selected within the two time intervals. Data are being archived at NASA Langley Research Center, and, once there, are readily available to the international scientific community. 43 refs., 13 figs., 4 tabs.

  16. Linearly Organized Turbulence Structures Observed Over a Suburban Area by Dual-Doppler Lidar

    SciTech Connect (OSTI)

    Newsom, Rob K.; Calhoun, Ron; Ligon, David; Allwine, K Jerry

    2008-04-01T23:59:59.000Z

    Dual-Doppler lidar observations are used to investigate the structure and evolution of surface layer flow over a suburban area. The observations were made during the Joint Urban 2003 (JU2003) field experiment in Oklahoma City in the summer of 2003. This study focuses specifically on a 10-hour sequence of scan data beginning shortly after noon local time on July 7, 2003. During this period two coherent Doppler lidars performed overlapping low elevation angle sector scans upwind and south of Oklahoma City’s central business district (CBD). Radial velocity data from the two lidars are processed to reveal the structure and evolution of the horizontal velocity field in the surface layer throughout the afternoon and evening transition periods. The retrieved velocity fields clearly show a tendency for turbulence structures to be elongated in the direction of the mean flow throughout the entire 10-hour study period. As the stratification changed from unstable to weakly stable the turbulence structures became increasingly more linearly organized, and the cross-stream separation between high- and low-speed regoins decreased. The spatially resolved velocity fields are used to estimate streamwise and cross-stream turbulence length scales as functions of stability.

  17. Proceedings of EARSeL-SIG-Workshop LIDAR, Dresden/FRG, June 16 17, 2000 EARSeL eProceedings No. 1 28

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    and Development Center, Coastal and Hydraulics Laboratory, Joint Airborne Lidar Bathymetry Technical Center Hydrographic Operational Airborne Lidar Survey) system has been used to collect regional data gives an overview of SHOALS, the RSMDP and the SHOALS data sets that have been collected for the region

  18. Meas. Sci. Technol. 10 (1999) 11781184. Printed in the UK PII: S0957-0233(99)06575-3 Submarine lidar for seafloor

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    for the detection of dissolved and sunken pollutants. One of these instruments is the submarine lidar, combining: fluorescence lidar, range-gating video, seafloor monitoring 1. Submarine sensor network for pollution of Oldenburg, Laser Remote Sensing Group), · an acoustic sensor for measuring the acoustic impedance

  19. TARSHA-KURDI, F., LANDES, T., GRUSSENMEYER, P., (2008). Extended RANSAC algorithm for automatic detection of building roof planes from Lidar data.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2008-01-01T23:59:59.000Z

    detection of building roof planes from Lidar data. The Photogrammetric Journal of Finland. Vol. 21, n°1, 2008, pp.97-109. EXTENDED RANSAC ALGORITHM FOR AUTOMATIC DETECTION OF BUILDING ROOF PLANES FROM LIDAR the detection of 3D building roof planes are of crucial importance. For this purpose, this paper studies

  20. ARM - Publications: Science Team Meeting Documents: MPL Hardware Upgrades

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa-Anomalous Radiative AbsorptionARM InArctic Facilityand New Measurement Capabilities

  1. ARM - PI Product - Planetary Boundary Layer from AERI and MPL

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDCnarrowbandheatProductsISDAC

  2. Characterizing Aerosol Distributions and Optical Properties Using the NASA Langley High Spectral Resolution Lidar

    SciTech Connect (OSTI)

    Hostetler, Chris; Ferrare, Richard

    2013-02-14T23:59:59.000Z

    The objective of this project was to provide vertically and horizontally resolved data on aerosol optical properties to assess and ultimately improve how models represent these aerosol properties and their impacts on atmospheric radiation. The approach was to deploy the NASA Langley Airborne High Spectral Resolution Lidar (HSRL) and other synergistic remote sensors on DOE Atmospheric Science Research (ASR) sponsored airborne field campaigns and synergistic field campaigns sponsored by other agencies to remotely measure aerosol backscattering, extinction, and optical thickness profiles. Synergistic sensors included a nadir-viewing digital camera for context imagery, and, later in the project, the NASA Goddard Institute for Space Studies (GISS) Research Scanning Polarimeter (RSP). The information from the remote sensing instruments was used to map the horizontal and vertical distribution of aerosol properties and type. The retrieved lidar parameters include profiles of aerosol extinction, backscatter, depolarization, and optical depth. Products produced in subsequent analyses included aerosol mixed layer height, aerosol type, and the partition of aerosol optical depth by type. The lidar products provided vertical context for in situ and remote sensing measurements from other airborne and ground-based platforms employed in the field campaigns and was used to assess the predictions of transport models. Also, the measurements provide a data base for future evaluation of techniques to combine active (lidar) and passive (polarimeter) measurements in advanced retrieval schemes to remotely characterize aerosol microphysical properties. The project was initiated as a 3-year project starting 1 January 2005. It was later awarded continuation funding for another 3 years (i.e., through 31 December 2010) followed by a 1-year no-cost extension (through 31 December 2011). This project supported logistical and flight costs of the NASA sensors on a dedicated aircraft, the subsequent analysis and archival of the data, and the presentation of results in conferences, workshops, and publications. DOE ASR field campaigns supported under this project included - MAX-Mex /MILAGRO (2006) - TexAQS 2006/GoMACCS (2006) - CHAPS (2007) - RACORO (2009) - CARE/CalNex (2010) In addition, data acquired on HSRL airborne field campaigns sponsored by other agencies were used extensively to fulfill the science objectives of this project and the data acquired have been made available to other DOE ASR investigators upon request.

  3. ARM - Field Campaign - NASA Coordinated Airborne CO2 Lidar Flight Test

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-Phase Arctic Cloud

  4. Lidar Measurements of the Vertical Distribution of Aerosol Optical and Physical Properties over Central Asia

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

    Chen, Boris B.; Sverdlik, Leonid G.; Imashev, Sanjar A.; Solomon, Paul A.; Lantz, Jeffrey; Schauer, James J.; Shafer, Martin M.; Artamonova, Maria S.; Carmichael, Gregory R.

    2013-01-01T23:59:59.000Z

    The vertical structure of aerosol optical and physical properties was measured by Lidar in Eastern Kyrgyzstan, Central Asia, from June 2008 to May 2009. Lidar measurements were supplemented with surface-based measurements of PM2.5and PM10mass and chemical composition in both size fractions. Dust transported into the region is common, being detected 33% of the time. The maximum frequency occurred in the spring of 2009. Dust transported to Central Asia comes from regional sources, for example, Taklimakan desert and Aral Sea basin, and from long-range transport, for example, deserts of Arabia, Northeast Africa, Iran, and Pakistan. Regional sources are characterized by pollutionmore »transport with maximum values of coarse particles within the planetary boundary layer, aerosol optical thickness, extinction coefficient, integral coefficient of aerosol backscatter, and minimum values of the Ångström exponent. Pollution associated with air masses transported over long distances has different characteristics during autumn, winter, and spring. During winter, dust emissions were low resulting in high values of the Ångström exponent (about 0.51) and the fine particle mass fraction (64%). Dust storms were more frequent during spring with an increase in coarse dust particles in comparison to winter. The aerosol vertical profiles can be used to lower uncertainty in estimating radiative forcing.« less

  5. Quantifying and relating land-surface and subsurface variability in permafrost environments using LiDAR and surface geophysical

    E-Print Network [OSTI]

    LiDAR and surface geophysical datasets S. S. Hubbard & C. Gangodagamage & B. Dafflon & H. Wainwright. Wullschleger Abstract The value of remote sensing and surface geophysical data for characterizing the spatial to extract geomorphic metrics, which potentially indicate drainage potential. Geophysical data were used

  6. Lidar observations of polar mesospheric clouds at Rothera, Antarctica (67.5S, 68.0W)

    E-Print Network [OSTI]

    Chu, Xinzhao

    Chu,1 Graeme J. Nott,2 Patrick J. Espy,2 Chester S. Gardner,1 Jan C. Diettrich,2 Mark A. Clilverd,2 and Martin J. Jarvis2 Received 15 September 2003; revised 15 October 2003; accepted 30 October 2003. Diettrich, M. A. Clilverd, and M. J. Jarvis (2004), Lidar observations of polar mesospheric clouds

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

    E-Print Network [OSTI]

    Sheridan, Jennifer

    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

  8. Estimating forest structural characteristics with airborne lidar scanning and a near-real time profiling laser systems

    E-Print Network [OSTI]

    Zhao, Kaiguang

    2009-05-15T23:59:59.000Z

    for realtime remote sensing platforms, e.g., to provide timely information for urgent applications. This study aims to develop an airborne profiling LiDAR system, featured with on-the-fly data processing, for near real- or real- time forest inventory...

  9. Using LiDAR and normalized difference vegetation index to remotely determine LAI and percent canopy cover at varying scales

    E-Print Network [OSTI]

    Griffin, Alicia Marie Rutledge

    2009-05-15T23:59:59.000Z

    The use of airborne LiDAR (Light Detection and Ranging) as a direct method to evaluate forest canopy parameters is vital in addressing both forest management and ecological concerns. The overall goal of this study was to develop the use of airborne...

  10. Active probing of cloud multiple scattering, optical depth, vertical thickness, and liquid water content using wide-angle imaging LIDAR.

    SciTech Connect (OSTI)

    Love, Steven P.; Davis, A. B. (Anthony B.); Rohde, C. A. (Charles A.); Tellier, L. L. (Larry L.); Ho, Cheng,

    2002-01-01T23:59:59.000Z

    At most optical wavelengths, laser light in a cloud lidar experiment is not absorbed but merely scattered out of the beam, eventually escaping the cloud via multiple scattering. There is much information available in this light scattered far from the input beam, information ignored by traditional 'on-beam' lidar. Monitoring these off-beam returns in a fully space- and time-resolved manner is the essence of our unique instrument, Wide Angle Imaging Lidar (WAIL). In effect, WAIL produces wide-field (60-degree full-angle) 'movies' of the scattering process and records the cloud's radiative Green functions. A direct data product of WAIL is the distribution of photon path lengths resulting from multiple scattering in the cloud. Following insights from diffusion theory, we can use the measured Green functions to infer the physical thickness and optical depth of the cloud layer, and, from there, estimate the volume-averaged liquid water content. WAIL is notable in that it is applicable to optically thick clouds, a regime in which traditional lidar is reduced to ceilometry. Here we present recent WAIL data oti various clouds and discuss the extension of WAIL to full diurnal monitoring by means of an ultra-narrow magneto-optic atomic line filter for daytime measurements.

  11. Field Test Results from Lidar Measured Yaw Control for Improved Yaw Alignment with the NREL Controls Advanced Research Turbine: Preprint

    SciTech Connect (OSTI)

    Scholbrock, A.; Fleming, P.; Wright, A.; Slinger, C.; Medley, J.; Harris, M.

    2014-12-01T23:59:59.000Z

    This paper describes field tests of a light detection and ranging (lidar) device placed forward looking on the nacelle of a wind turbine and used as a wind direction measurement to directly control the yaw position of a wind turbine. Conventionally, a wind turbine controls its yaw direction using a nacelle-mounted wind vane. If there is a bias in the measurement from the nacelle-mounted wind vane, a reduction in power production will be observed. This bias could be caused by a number of issues such as: poor calibration, electromagnetic interference, rotor wake, or other effects. With a lidar mounted on the nacelle, a measurement of the wind could be made upstream of the wind turbine where the wind is not being influenced by the rotor's wake or induction zone. Field tests were conducted with the lidar measured yaw system and the nacelle wind vane measured yaw system. Results show that a lidar can be used to effectively measure the yaw error of the wind turbine, and for this experiment, they also showed an improvement in power capture because of reduced yaw misalignment when compared to the nacelle wind vane measured yaw system.

  12. Arctic-Winter Climatology and Radiative Effects of Clouds and Aerosols Based on Lidar and Radar Measurements at PEARL

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    Arctic-Winter Climatology and Radiative Effects of Clouds and Aerosols Based on Lidar and Radar Atmospheric Radiative Transfer (SBDART) code. Results on the climatology and radiative effects of clouds, arctic regions are the site of interactions between aerosols, clouds, radiation and precipitations

  13. Deriving a Framework for Estimating Individual Tree Measurements with Lidar for Use in the TAMBEETLE Southern Pine Beetle Infestation Growth Model

    E-Print Network [OSTI]

    Stukey, Jared D.

    2011-02-22T23:59:59.000Z

    The overall goal of this study was to develop a framework for using airborne lidar to derive inputs for the SPB infestation growth model TAMBEETLE. The specific objectives were (1) to estimate individual tree characteristics of XY location...

  14. Sedimentological Reinterpretation of Surficial Unconsolidated Debris Flows and Stream Deposits of the Southern Flanks of Grand Mesa, CO: An Integrated LiDAR Approach

    E-Print Network [OSTI]

    Blakeley, Mitchell W.

    2014-08-08T23:59:59.000Z

    . This study developed a sedimentological description and interpretation of these deposits and tested the capabilities of terrestrial LiDAR (Light Detection and Ranging) for use in sedimentological studies. This research addressed the origin of the deposits...

  15. Comparing Pulsed Doppler LIDAR with SODAR and Direct Measurements for Wind Assessment

    SciTech Connect (OSTI)

    Kelley, N. D.; Jonkman, B. J.; Scott, G. N.; Pichugina, Y. L.

    2007-07-01T23:59:59.000Z

    There is a pressing need for good wind-speed measurements at greater and greater heights to assess the availability of the resource in terms of power production and to identify any frequently occurring atmospheric structural characteristics that may create turbulence that impacts the operational reliability and lifetime of wind turbines and their components. In this paper, we summarize the results of a short study that compares the relative accuracies of wind speeds derived from a high-resolution pulsed Doppler LIDAR operated by the National Oceanic and Atmospheric Administration (NOAA) and a midrange Doppler SODAR with wind speeds measured by four levels of tower-based sonic anemometry up to a height of 116 m.

  16. Rayleigh LIDAR and satellite (HALOE, SABER, CHAMP and COSMIC) measurements of stratosphere-mesosphere temperature over a southern sub-tropical site, Reunion (20.8° S; 55.5° E): climatology and comparison study

    E-Print Network [OSTI]

    Sivakumar, V.; Vishnu Prasanth, P.; Kishore, P.; Bencherif, H.; Keckhut, P.

    2011-01-01T23:59:59.000Z

    climatology of the mid- dle atmosphere from long-termLIDAR measurements at mid- dle and low latitudes, J.Over the southern tropics, mid- dle atmosphere temperature

  17. Observations of tropical cirrus properties in the pilot radiation observation experiment using lidar and the CSIRO ARM filter radiometer

    SciTech Connect (OSTI)

    Platt, C.M.R.; Young, S.A.; Manson, P.J.; Patterson, G.R. [CSIRO, Victoria (Australia)

    1995-04-01T23:59:59.000Z

    A narrow beam fast filter radiometer has been developed for the Atmospheric Radiation Measurement (ARM) Program. The radiometer is intended to operate alongside a lidar at ARM sites in a lidar/radiometer (LIRAD) configuration. The radiometer detects in three narrow bands at 8.62-, 10.86-, and 12.04-m central wavelengths in the atmospheric window. In addition, it has a variable field aperture that varies the radiance incident on the detector and also allows the field of view to be tailored to that of a lidar used in the LIRAD technique. The radiometer was deployed in the ARM Pilot Radiation Observation Experiment (PROBE) at Kavieng, Papua New Guinea in January-February 1993. The radiometer worked satisfactorily and appeared to be very stable. The radiometer was compared with a previous CSIRO radiometer and the improved performance of the ARM instrument was very evident. The ARM radiometer was also compared with a National Oceanic and Atmospheric Administration (NOAA) Environmental Technology Laboratories (ETL) interferometer and gave closely equivalent radiances. The LIRAD method was used at Kavieng to obtain the optical properties of cirrus clouds. Continuous observations of water vapor path obtained by the NOAA ETL microwave radiometer were employed to allow for the strong tropical water vapor absorption and emission. Cirrus cells that developed on one morning, independent of other clouds, had measured infrared emittances varying from <0.1 to 1.0.

  18. Analysis and Calibration of CRF Raman Lidar Cloud Liquid Water Measurements

    SciTech Connect (OSTI)

    Turner, D.D.

    2007-10-31T23:59:59.000Z

    The Atmospheric Radiation Measurement (ARM) Raman lidar (RL), located at the Southern Great Plains (SGP) Climate Research Facility (CRF), is a unique state-of-the-art active remote sensor that is able to measure profiles of water vapor, aerosol, and cloud properties at high temporal and vertical resolution throughout the diurnal cycle. In October 2005, the capability of the RL was extended by the addition of a new detection channel that is sensitive to the Raman scattering of liquid water. This new channel permits the system, in theory, to measure profiles of liquid water content (LWC) by the RL. To our knowledge, the ARM RL is the only operation lidar with this capability. The liquid water Raman backscattering cross-section is a relatively weak and spectrally broad feature, relative to the water vapor Raman backscatter signal. The wide bandpass required to achieve reasonable signal-to-noise in the liquid water channel essentially eliminates the ability to measure LWC profiles during the daytime in the presence of large solar background, and thus all LWC observations are nighttime only. Additionally, the wide bandpass increases the probability that other undesirable signals, such as fluorescence from aerosols, may contaminate the observation. The liquid water Raman cross-section has a small amount of overlap with the water vapor Raman cross-section, and thus there will be a small amount of ‘cross-talk’ between the two signals, with water vapor contributing a small amount of signal to the LWC observation. And finally, there is significant uncertainty in the actual strength of the liquid water Raman cross-section in the literature. The calibrated LWC profiles, together with the coincident cloud backscatter observations also made by the RL, can be used to derive profiles of cloud droplet effective radius. By combining these profiles of effective radius in the lower portion of the cloud with the aerosol extinction measurements made below the cloud by the RL, the first aerosol indirect effect can be investigated using a single instrument, thereby reducing the uncertainty associated with aligning the different sampling periods and fields of view of multiple instruments. We have applied a “first principles” calibration to the LWC profiles. This approach requires that the relative differences in optical efficiency between the water vapor and liquid water channels be known; this relative difference is easily computed using the efficiency values of the beam splitters and interference filters in the lidar that were provided by the vendors of these components. The first principles approach then transfers the calibration from the water vapor mixing ratio to the LWC using the difference in the optical efficiency and an interpolated value of the liquid water Raman cross section from the literature, and the better established water vapor Raman cross section. After accounting for all known error sources, the vertical integral of LWC was compared against a similar value retrieved from a co-located ground-based infrared radiometer. The RL and infrared radiometer have significantly different fields of view; thus to compare the two sensors the data were averaged to 5 min intervals where only cloudy samples were included in the average of each. While there is fair scatter in the data (r=0.47), there is also a clear indication of a positive correlation between the infrared and the RL values. The value of the slope of the regression is 0.49, which indicates a tendency of the RL measurements to underestimate the total liquid amount with respect to the infrared retrieval. Research continues to investigate the source of the bias, but the most likely candidate is the large uncertainty in the liquid water Raman cross-section as there have been no direct measurements made of this parameter at the lidar’s laser wavelength of 355 nm. The calibrated LWC profile was then used together with the cloud backscatter coefficient profile from the RL to derive profiles of cloud droplet effective radius and cloud droplet number density. These profiles o

  19. Analysis of Doppler Lidar Data Acquired During the Pentagon Shield Field Campaign

    SciTech Connect (OSTI)

    Newsom, Rob K.

    2011-04-14T23:59:59.000Z

    Observations from two coherent Doppler lidars deployed during the Pentagon Shield field campaign are analyzed in conjunction with other sensors to characterize the overall boundary-layer structure, and identify the dominant flow characteristics during the entire two-week field campaign. Convective boundary layer (CBL) heights and cloud base heights (CBH) are estimated from an analysis of the lidar signal-to-noise-ratio (SNR), and mean wind profiles are computed using a modified velocity-azimuth-display (VAD) algorithm. Three-dimensional wind field retrievals are computed from coordinated overlapping volume scans, and the results are analyzed by visualizing the flow in horizontal and vertical cross sections. The VAD winds show that southerly flows dominate during the two-week field campaign. Low-level jets (LLJ) were evident on all but two of the nights during the field campaign. The LLJs tended to form a couple hours after sunset and reach maximum strength between 03 and 07 UTC. The surface friction velocities show distinct local maxima during four nights when strong LLJs formed. Estimates of the convective boundary layer height and residual layer height are obtained through an analysis of the vertical gradient of the lidar signal-to-noise-ratio (SNR). Strong minimum in the SNR gradient often develops just above the surface after sunrise. This minimum is associated with the developing CBL, and increases rapidly during the early portion of the daytime period. On several days, this minimum continues to increase until about sunset. Secondary minima in the SNR gradient were also observed at higher altitudes, and are believed to be remnants of the CBL height from previous days, i.e. the residual layer height. The dual-Doppler analysis technique used in this study makes use of hourly averaged radial velocity data to produce three-dimensional grids of the horizontal velocity components, and the horizontal velocity variance. Visualization of horizontal and vertical cross sections of the dual-Doppler wind retrievals often indicated a jet-like flow feature over the Potomac River under southerly flow conditions. This linear flow feature is roughly aligned with the Potomac River corridor to the south of the confluence with the Anatostia River, and is most apparent at low levels (i.e. below ~150 m MSL). It is believed that this flow arises due to reduced drag over the water surface and when the large scale flow aligns with the Potomac River corridor. A so-called area-constrained VAD analysis generally confirmed the observations from the dual-Doppler analysis. When the large scale flow is southerly, wind speeds over the Potomac River are consistently larger than the at a site just to the west of the river for altitudes less than 100 m MSL. Above this level, the trend is somewhat less obvious. The data suggest that the depth of the wind speed maximum may be reduced by strong directional shear aloft.

  20. The Daytime Mixed Layer Observed by Radiosonde, Profiler, and LIDAR during MILAGRO

    SciTech Connect (OSTI)

    Shaw, William J.; Pekour, Mikhail S.; Coulter, Richard L.; Martin, Tim J.; Walters, Justin

    2007-10-19T23:59:59.000Z

    During the MILAGRO campaign centered in the Mexico City area, Pacific Northwest National Laboratory (PNNL) and Argonne National Laboratory (ANL) operated several atmospheric profiling systems at Veracruz and at two locations on the Central Mexican Plateau in the region around Mexico City. These systems included radiosondes, wind profilers, a sodar, and an aerosol backscatter lidar. An additional wind profiler was operated by the University of Alabama in Huntsville (UAH) at the Mexican Petroleum Institue (IMP) near the center of Mexico City. Because of the opportunity afforded by collocation of profilers, radiosondes, and a lidar, and because of the importance of boundary layer depth on aerosol properties, we have carried out a comparison of mixed layer depth as determined independently from these three types of measurement systems during the campaign. We have then used results of this comparison and additional measurements to develop a detailed description of the daily structure and evolution of the boundary layer on the Central Mexican Plateau during MILAGRO. Our analysis indicates that the profilers were more consistently successful in establishing the mixing layer depth during the daytime. The boundary layer growth was similar at the three locations, although the mixing layer tended to be slightly deeper in the afternoon in central Mexico City. The sodar showed that convection began about an hour after sunrise. Maximum daily mixed layer depths always reached 2000 m AGL and frequently extended to 4000 m. The rate and variability of mixing layer growth was essentially the same as that observed during the IMADA-AVER campaign in the same season in 1997. This growth did not seem to be related to whether deep convection was reported on a given day. Wind speeds within the boundary layer exhibited a daily low-altitude maximum in the late afternoon with lighter winds aloft, consistent with previous reports of diurnal regional circulations. Norte events, which produced high winds at Veracruz, did not appreciably modulate the winds on the plateau. Finally, despite the typically dry conditions at the surface, radiosonde profiles showed that relative humidity often exceeded 50% in the early morning and in the upper part of the boundary layer.

  1. Evaluation of tropospheric water vapor profiling using eye-safe, infrared differential absorption lidar

    SciTech Connect (OSTI)

    Rye, B.J. [Colorado Univ., Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences]|[National Oceanic and Atmospheric Administration, Boulder, CO (United States). Environmental Technology Lab.; Machol, J.L.; Grund, C.J.; Hardesty, R.M. [National Oceanic and Atmospheric Administration, Boulder, CO (United States). Environmental Technology Lab.

    1996-05-14T23:59:59.000Z

    Continuous, high quality profiles of water vapor, free of systematic bias, and of moderate temporal and spatial resolution are fundamental to the success of the ARM CART program. In addition, these should be acquired over long periods at low operational and maintenance cost. The development and verification of realistic climate model parameterizations for clouds and net radiation balance, and the correction of other CART site sensor observations for interferences due to the presence of water vapor are critically dependent on water vapor profile measurements. To date, application of profiles have been limited by vertical resolution and uniqueness and high operating cost, or diminished daytime performance, lack of eye-safety, and high maintenance cost. Recent developments in infrared laser and detector technology make possible compact IR differential absorption lidar (DIAL) systems at eye-safe wavelengths. In the studies reported here, we develop DIAL system performance models and examine the potential of solving some of the shortcomings of previous methods using parameters representative of current technologies. These simulations are also applied to determine the strengths and weaknesses unique to the DIAL method for this application.

  2. Turn-key Raman lidar for profiling atmospheric water vapor, clouds, and aerosols at the US Southern Great Plains Climate Study Site

    SciTech Connect (OSTI)

    Goldsmith, J.E.M.; Blair, F.H.; Bisson, S.E.

    1997-12-31T23:59:59.000Z

    There are clearly identified scientific requirements for continuous profiling of atmospheric water vapor at the Department of Energy, Atmospheric Radiation Measurement program, Southern Great Plains CART (Cloud and Radiation Testbed) site in northern Oklahoma. Research conducted at several laboratories has demonstrated the suitability of Raman lidar for providing measurements that are an excellent match to those requirements. We have developed and installed a ruggedized Raman lidar system that resides permanently at the CART site, and that is computer automated to eliminate the requirements for operator interaction. In addition to the design goal of profiling water vapor through most of the troposphere during nighttime and through the boundary layer during daytime, the lidar provides quantitative characterizations of aerosols and clouds, including depolarization measurements for particle phase studies.

  3. A digital map of the high center (HC) and low center (LC) polygon boundaries delineated from high resolution LiDAR data for Barrow, Alaska

    SciTech Connect (OSTI)

    Gangodagamage, Chandana; Wullschleger, Stan

    2014-07-03T23:59:59.000Z

    This dataset represent a map of the high center (HC) and low center (LC) polygon boundaries delineated from high resolution LiDAR data for the arctic coastal plain at Barrow, Alaska. The polygon troughs are considered as the surface expression of the ice-wedges. The troughs are in lower elevations than the interior polygon. The trough widths were initially identified from LiDAR data, and the boundary between two polygons assumed to be located along the lowest elevations on trough widths between them.

  4. A digital map of the high center (HC) and low center (LC) polygon boundaries delineated from high resolution LiDAR data for Barrow, Alaska

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

    Gangodagamage, Chandana; Wullschleger, Stan

    This dataset represent a map of the high center (HC) and low center (LC) polygon boundaries delineated from high resolution LiDAR data for the arctic coastal plain at Barrow, Alaska. The polygon troughs are considered as the surface expression of the ice-wedges. The troughs are in lower elevations than the interior polygon. The trough widths were initially identified from LiDAR data, and the boundary between two polygons assumed to be located along the lowest elevations on trough widths between them.

  5. A joint study of the lower ionosphere by radar, lidar, and spectrometer

    SciTech Connect (OSTI)

    Zhou, Qihou.

    1991-01-01T23:59:59.000Z

    The dynamics and associated phenomena occurring in the lower ionospheric-E region, especially the mesopause region between 80 km to 110 km at low latitude, are studied. In particular, incoherent scatter radar (ISR), sodium lidar and airglow spectrometry are used to study the ionospheric structure and neutral sodium structure. The simultaneous study of the ionospheric plasma and neutral atomic sodium is unprecedented in scope and detail. The joint study of the mesopause region reveals that plasma, neutral densities and temperature are interconnected through the same atmospheric dynamics. The theme of the thesis is to explain the formation of the controversial sporadic sodium layer (SSL) events. Strong correlation is established between the average total ion and sodium concentrations, and between sporadic-E and SSL events. The mechanism proposed in the thesis, which invokes temperature fluctuations induced by tides and gravity waves, finds good agreement with observations. Tides and gravity waves can converge ions into thin layers through the windshear mechanisms and can influence the concentration of atomic sodium through temperature fluctuations. Sodium abundance is shown to augment rapidly when the temperature is increased. Gravity wave theory states that the ion convergence node coincides with a temperature maximum for a westward propagating gravity wave, and coincides with a temperature minimum for an eastward propagating wave. Because tidal winds propagate westward, the ion layer coincides with the temperature maximum which consequently induces higher sodium concentration. This can account for the general correlation between sodium and total ion concentration and is supported by the O2(0-1) rotational temperature. Gravity waves and their interaction with tidal winds are believed to be responsible for the close association between sudden sodium layers and sporadic-E layers.

  6. Horizontal-Velocity and Variance Measurements in the Stable Boundary Layer Using Doppler Lidar: Sensitivity to Averaging Procedures

    SciTech Connect (OSTI)

    Pichugina, Yelena L.; Banta, Robert M.; Kelley, Neil D.; Jonkman, Bonnie J.; Tucker, Sara C.; Newsom, Rob K.; Brewer, W. A.

    2008-08-01T23:59:59.000Z

    Quantitative data on turbulence variables aloft--above the region of the atmosphere conveniently measured from towers--has been an important but difficult measurement need for advancing understanding and modeling of the stable boundary layer (SBL). Vertical profiles of streamwise velocity variances obtained from NOAA’s High Resolution Doppler Lidar (HRDL), which have been shown to be numerically equivalent to turbulence kinetic energy (TKE) for stable conditions, are a measure of the turbulence in the SBL. In the present study, the mean horizontal wind component U and variance ?u2 were computed from HRDL measurements of the line-of-sight (LOS) velocity using a technique described in Banta, et al. (2002). The technique was tested on datasets obtained during the Lamar Low-Level Jet Project (LLLJP) carried out in early September 2003, near the town of Lamar in southeastern Colorado. This paper compares U with mean wind speed obtained from sodar and sonic anemometer measurements. It then describes several series of averaging tests that produced the best correlation between TKE calculated from sonic anemometer data at several tower levels and lidar measurements of horizontal velocity variance ?u2. The results show high correlation (0.71-0.97) of the mean U and average wind speed measured by sodar and in-situ instruments, independent of sampling strategies and averaging procedures. Comparison of estimates of variance, on the other hand, proved sensitive to both the spatial and temporal averaging techniques.

  7. Observational Studies of Atmospheric Aerosols over Bozeman, Montana, Using a Two-Color Lidar, a Water Vapor DIAL, a Solar Radiometer,

    E-Print Network [OSTI]

    Shaw, Joseph A.

    Observational Studies of Atmospheric Aerosols over Bozeman, Montana, Using a Two-Color Lidar form 24 June 2010) ABSTRACT Coordinated observational data of atmospheric aerosols were collected over-based nephelometer. The optical properties and spatial distribution of the atmospheric aerosols were inferred from

  8. SilviLaser 2011, Oct. 16-19, 2011 Hobart, Australia Towards automated and operational forest inventories with T-Lidar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    inventories with T-Lidar A. Othmani1 , A. Piboule2 , M. Krebs3 , C. Stolz1 and L.F.C. Lew Yan Voon1 1 Cluny, France, michael.krebs@ensam.eu Keywords: terrestrial laser scanning, forest inventory, tree detection, DBH. Abstract Forest inventory automation has become a major issue in forestry. The complexity

  9. Cloud fraction, liquid and ice water contents derived from long-term radar, lidar, and microwave radiometer data are systematically compared to models to quantify and

    E-Print Network [OSTI]

    Hogan, Robin

    Cloud fraction, liquid and ice water contents derived from long-term radar, lidar, and microwave a systematic evaluation of clouds in forecast models. Clouds and their associated microphysical processes for end users of weather forecasts, who may be interested not only in cloud cover, but in other variables

  10. Evaluation of Cloud-Phase Retrieval Methods for SEVIRI on Meteosat-8 Using Ground-Based Lidar and Cloud Radar Data

    E-Print Network [OSTI]

    Stoffelen, Ad

    Evaluation of Cloud-Phase Retrieval Methods for SEVIRI on Meteosat-8 Using Ground-Based Lidar and Cloud Radar Data ERWIN L. A. WOLTERS, ROBERT A. ROEBELING, AND ARNOUT J. FEIJT Royal Netherlands 2007) ABSTRACT Three cloud-phase determination algorithms from passive satellite imagers are explored

  11. LIDAR Wind Speed Measurement Analysis and Feed-Forward Blade Pitch Control for Load Mitigation in Wind Turbines: January 2010--January 2011

    SciTech Connect (OSTI)

    Dunne, F.; Simley, E.; Pao, L.Y.

    2011-10-01T23:59:59.000Z

    This report examines the accuracy of measurements that rely on Doppler LIDAR systems to determine their applicability to wind turbine feed-forward control systems and discusses feed-forward control system designs that use preview wind measurements. Light Detection and Ranging (LIDAR) systems are able to measure the speed of incoming wind before it interacts with a wind turbine rotor. These preview wind measurements can be used in feed-forward control systems designed to reduce turbine loads. However, the degree to which such preview-based control techniques can reduce loads by reacting to turbulence depends on how accurately the incoming wind field can be measured. The first half of this report examines the accuracy of different measurement scenarios that rely on coherent continuous-wave or pulsed Doppler LIDAR systems to determine their applicability to feed-forward control. In particular, the impacts of measurement range and angular offset from the wind direction are studied for various wind conditions. A realistic case involving a scanning LIDAR unit mounted in the spinner of a wind turbine is studied in depth with emphasis on choices for scan radius and preview distance. The effects of turbulence parameters on measurement accuracy are studied as well. Continuous-wave and pulsed LIDAR models based on typical commercially available units were used in the studies present in this report. The second half of this report discusses feed-forward control system designs that use preview wind measurements. Combined feedback/feed-forward blade pitch control is compared to industry standard feedback control when simulated in realistic turbulent above-rated winds. The feed-forward controllers are designed to reduce fatigue loads, increasing turbine lifetime and therefore reducing the cost of energy. Three feed-forward designs are studied: non-causal series expansion, Preview Control, and optimized FIR filter. The input to the feed-forward controller is a measurement of incoming wind speeds that could be provided by LIDAR. Non-causal series expansion and Preview Control methods reduce blade root loads but increase tower bending in simulation results. The optimized FIR filter reduces loads overall, keeps pitch rates low, and maintains rotor speed regulation and power capture, while using imperfect wind measurements provided by the spinning continuous-wave LIDAR model.

  12. A precise narrow-beam filter infrared radiometer and its use with lidar in the ARM Program

    SciTech Connect (OSTI)

    Platt, C.M.R.

    1992-05-01T23:59:59.000Z

    The first six months of the grant (December 1991--May 1992) have been taken up with the design and specification for the new narrow-beam radiometer. The radiometer will be built and tested at the Division of Atmospheric Research over the next three months. Improved algorithms for obtaining cloud extinction have also been developed. It is proposed during 1993 to use the radiometer in conjunction with a new CSIRO 3-wavelength lidar in the ARM PROBE experiment at Kavieng, New Guinea, which is a test mission under tropical conditions for the ARM CART Tropical West Pacific site, and is part of the TOGA COARE experiment. During the latter part of 1992, the radiometer will be tested thoroughly and tested at the Division of Atmospheric Research, Aspendale.

  13. Wide-angle imaging LIDAR (WAIL): a ground-based instrument for monitoring the thickness and density of optically thick clouds.

    SciTech Connect (OSTI)

    Love, Steven P.; Davis, A. B. (Anthony B.); Rohde, C. A. (Charles A.); Ho, Cheng,

    2001-01-01T23:59:59.000Z

    Traditional lidar provides little information on dense clouds beyond the range to their base (ceilometry), due to their extreme opacity. At most optical wavelengths, however, laser photons are not absorbed but merely scattered out of the beam, and thus eventually escape the cloud via multiple scattering, producing distinctive extended space- and time-dependent patterns which are, in essence, the cloud's radiative Green functions. These Green functions, essentially 'movies' of the time evolution of the spatial distribution of escaping light, are the primary data products of a new type of lidar: Wide Angle Imaging Lidar (WAIL). WAIL data can be used to infer both optical depth and physical thickness of clouds, and hence the cloud liquid water content. The instrumental challenge is to accommodate a radiance field varying over many orders of magnitude and changing over widely varying time-scales. Our implementation uses a high-speed microchannel plate/crossed delay line imaging detector system with a 60-degree full-angle field of view, and a 532 nm doubled Nd:YAG laser. Nighttime field experiments testing various solutions to this problem show excellent agreement with diffusion theory, and retrievals yield plausible values for the optical and geometrical parameters of the observed cloud decks.

  14. Horizontal Velocity and Variance Measurements in the Stable Boundary Layer Using Doppler Lidar: Sensitivity to Averaging Procedures

    SciTech Connect (OSTI)

    Pichugina, Y. L.; Banta, R. M.; Kelley, N. D.; Jonkman, B. J.; Tucker, S. C.; Newsom, R. K.; Brewer, W. A.

    2008-08-01T23:59:59.000Z

    Quantitative data on turbulence variables aloft--above the region of the atmosphere conveniently measured from towers--have been an important but difficult measurement need for advancing understanding and modeling of the stable boundary layer (SBL). Vertical profiles of streamwise velocity variances obtained from NOAA's high-resolution Doppler lidar (HRDL), which have been shown to be approximately equal to turbulence kinetic energy (TKE) for stable conditions, are a measure of the turbulence in the SBL. In the present study, the mean horizontal wind component U and variance {sigma}2u were computed from HRDL measurements of the line-of-sight (LOS) velocity using a method described by Banta et al., which uses an elevation (vertical slice) scanning technique. The method was tested on datasets obtained during the Lamar Low-Level Jet Project (LLLJP) carried out in early September 2003, near the town of Lamar in southeastern Colorado. This paper compares U with mean wind speed obtained from sodar and sonic anemometer measurements. The results for the mean U and mean wind speed measured by sodar and in situ instruments for all nights of LLLJP show high correlation (0.71-0.97), independent of sampling strategies and averaging procedures, and correlation coefficients consistently >0.9 for four high-wind nights, when the low-level jet speeds exceeded 15 m s{sup -1} at some time during the night. Comparison of estimates of variance, on the other hand, proved sensitive to both the spatial and temporal averaging parameters. Several series of averaging tests are described, to find the best correlation between TKE calculated from sonic anemometer data at several tower levels and lidar measurements of horizontal-velocity variance {sigma}{sup 2}{sub u}. Because of the nonstationarity of the SBL data, the best results were obtained when the velocity data were first averaged over intervals of 1 min, and then further averaged over 3-15 consecutive 1-min intervals, with best results for the 10- and 15-min averaging periods. For these cases, correlation coefficients exceeded 0.9. As a part of the analysis, Eulerian integral time scales ({tau}) were estimated for the four high-wind nights. Time series of {tau} through each night indicated erratic behavior consistent with the nonstationarity. Histograms of {tau} showed a mode at 4-5 s, but frequent occurrences of larger {tau} values, mostly between 10 and 100 s.

  15. Airborne Multiwavelength High-Spectral-Resolution Lidar (HSRL-2) Observations During TCAP 2012: Vertical Proles of Optical and Microphysical Properties of a Smoke/Urban Haze Plume Over the Northeastern Coast of the US

    SciTech Connect (OSTI)

    Muller, Detlef; Hostetler, Chris A.; Ferrare, R. A.; Burton, S. P.; Chemyakin, Eduard; Kolgotin, A.; Hair, John; Cook, A. L.; Harper, David; Rogers, R. R.; Hare, Rich; Cleckner, Craig; Obland, Michael; Tomlinson, Jason M.; Berg, Larry K.; Schmid, Beat

    2014-10-10T23:59:59.000Z

    We present rst measurements with the rst airborne multiwavelength High-Spectral Resolution Lidar (HSRL-2), developed by NASA Langley Research Center. The instrument was operated during the Department of Energy (DOE) Two-Column Aerosol Project (TCAP) in July 2012. We observed out ow of urban haze and fresh biomass burning smoke from the East Coast of the US out over the West Atlantic Ocean. Lidar ratios at 355 and 532 nm were ... sr indicating moderately absorbing aerosols. Extinctionrelated Angstrom exponents were 1.5{2 pointing at comparably small particles. Our novel automated, unsupervised data inversion algorithm retrieves particle e*ective radii of approximately 0.2 *m, which is in agreement with the large Angstrom exponents. We nd reasonable agreement to particle size parameters obtained from situ measurements carried out with the DOE G-1 aircraft that ew during the lidar observations.

  16. S1MPL:E TECHNIQUES TO CO~RIRECI'FOR VCO NONLINEARITIES

    E-Print Network [OSTI]

    York, Robert A.

    rather than a static calibration of the VCO and results in a well focused point spread func- tion. We on a triple-balanced mixer were employed for simulta.neous measurement of the CO-and cross

  17. The Ability of MM5 to Simulate Ice Clouds: Systematic Comparison between Simulated and Measured Fluxes and Lidar/Radar Profiles at SIRTA Atmospheric Observatory

    SciTech Connect (OSTI)

    Chiriaco, M.; Vautard, R.; Chepfer, H.; Haeffelin, M.; Wanherdrick, Y.; Morille, Y.; Protat, A.; Dudhia, J.

    2005-03-18T23:59:59.000Z

    Ice clouds play a major role in the radiative energy budget of the Earth-atmosphere system (Liou 1986). Their radiative effect is governed primarily by the equilibrium between their albedo and greenhouse effects. Both macrophysical and microphysical properties of ice clouds regulate this equilibrium. For quantifying the effect of these clouds onto climate and weather systems, they must be properly characterized in atmospheric models. In this paper we use remote-sensing measurements from the SIRTA ground based atmospheric observatory (Site Instrumental de Recherche par Teledetection Atmospherique, http://sirta.lmd.polytechnique.fr). Lidar and radar observations taken over 18 months are used, in order to gain statistical confidence in the model evaluation. Along this period of time, 62 days are selected for study because they contain parts of ice clouds. We use the ''model to observations'' approach by simulating lidar and radar signals from MM5 outputs. Other more classical variables such as shortwave and longwave radiative fluxes are also used. Four microphysical schemes, among which that proposed by Reisner et al. (1998) with original or modified parameterizations of particle terminal fall velocities (Zurovac-Jevtic and Zhang 2003, Heymsfield and Donner 1990), and the simplified Dudhia (1989) scheme are evaluated in this study.

  18. Analysis of mixing layer heights inferred from radiosonde, wind profiler, airborne lidar, airborne microwave temperature profiler, and in-situ aircraft data during the Texas 2000 air quality study in Houston, TX

    E-Print Network [OSTI]

    Smith, Christina Lynn

    2005-08-29T23:59:59.000Z

    ................................................................................................................ 119 ix LIST OF FIGURES FIGURE Page 1 The diurnal evolution of the PBL modified from Stull, 1988........... 1 2 The Houston area with wind profiler and radiosonde sites............... 13... plot of wind profiler and lidar ML heights............................ 63 13 Standard Deviation between the MTP algorithm ML heights and wind profiler ML heights for all the sites combined .................. 70 14 Box and Whiskers Plots...

  19. Using Radar, Lidar, and Radiometer measurements to Classify Cloud Type and Study Middle-Level Cloud Properties

    SciTech Connect (OSTI)

    Wang, Zhien

    2010-06-29T23:59:59.000Z

    The project is mainly focused on the characterization of cloud macrophysical and microphysical properties, especially for mixed-phased clouds and middle level ice clouds by combining radar, lidar, and radiometer measurements available from the ACRF sites. First, an advanced mixed-phase cloud retrieval algorithm will be developed to cover all mixed-phase clouds observed at the ACRF NSA site. The algorithm will be applied to the ACRF NSA observations to generate a long-term arctic mixed-phase cloud product for model validations and arctic mixed-phase cloud processes studies. To improve the representation of arctic mixed-phase clouds in GCMs, an advanced understanding of mixed-phase cloud processes is needed. By combining retrieved mixed-phase cloud microphysical properties with in situ data and large-scale meteorological data, the project aim to better understand the generations of ice crystals in supercooled water clouds, the maintenance mechanisms of the arctic mixed-phase clouds, and their connections with large-scale dynamics. The project will try to develop a new retrieval algorithm to study more complex mixed-phase clouds observed at the ACRF SGP site. Compared with optically thin ice clouds, optically thick middle level ice clouds are less studied because of limited available tools. The project will develop a new two wavelength radar technique for optically thick ice cloud study at SGP site by combining the MMCR with the W-band radar measurements. With this new algorithm, the SGP site will have a better capability to study all ice clouds. Another area of the proposal is to generate long-term cloud type classification product for the multiple ACRF sites. The cloud type classification product will not only facilitates the generation of the integrated cloud product by applying different retrieval algorithms to different types of clouds operationally, but will also support other research to better understand cloud properties and to validate model simulations. The ultimate goal is to improve our cloud classification algorithm into a VAP.

  20. The Mid-Latitude Continental Convective Clouds Experiment (MC3E)

    SciTech Connect (OSTI)

    Petersen,W.; Jensen,M.; Genio, A. D.; Giangrande, S.; Heymsfield, A.; Heymsfield, G.; Hou, A.; Kollias, P.; Orr, B.; Rutledge, S.; Schwaller, M.; Zipser, E.

    2010-03-15T23:59:59.000Z

    The Midlatitude Continental Convective Cloud Experiment (MC3E) will take place in central Oklahoma during the April-May 2011 period. The experiment is a collaborative effort between the U.S. Department of Energy Atmospheric Radition Measurement Program and the National Aeronautics and Space Administration's (NASA) Global Precipitation Measurement (GPM) mission Ground Validation program. The Intensive Observation Period leverages the unprecedented observing infrastructure currently available in the central United States, combined with an extensive sounding array, remote sensing and in situ aircraft observations, NASA GPM ground validation remote sensors and new ARM instrumentation purchased with American Recovery and Reinvestment Act funding. The overarching goal is to provide the most complete characterization of convective cloud systems, precipitation and the environment that has ever been obtained, providing constraints for model cumulus parameterizations and space-based rainfall observations over land that have never before been available. Several different components of convective processes tangible to the convective parameterization problem are targeted such as, pre-convective environment and convective initiation, updraft / downdraft dynamics, condensate transport and detrainment, precipitation and cloud microphysics, influence on the environment and radiation and a detailed description of the large-scale forcing. MC3E will use a new multi-scale observing strategy with the participation of a network of distributed sensors (both passive and active). The approach is to document in 3-D not only the full spectrum of precipitation rates, but also clouds, winds and moisture in an attempt to provide a holistic view of convective clouds and their feedback with the environment. A goal is to measure cloud and precipitation transitions and environmental quantities that are important for satellite retrieval algorithms, convective parameterization in large-scale models and cloud-resolving model simulations. This will be accomplished through the deployment of several different elements that complement the existing (and soon to become available) ARM facilities: a network of radiosonde stations, NASA scanning multi-frequency/parameter radar systems at three different frequencies (Ka/Ku/S), high-altitude remote sensing and in situ aircraft, wind profilers and a network of surface disdrometers. In addition to these special MC3E instruments, there will be important new instrumentation deployed by DOE at the ARM site including: 3 networked scanning X-band radar systems, a C-band scanning radar, a dual wavelength (Ka/W) scanning cloud radar, a Doppler lidar and upgraded vertically pointing millimeter cloud radar (MMCR) and micropulse lidar (MPL).To fully describe the properties of precipitating cloud systems, both in situ and remote sensing airborne observations are necessary. The NASA GPM-funded University of North Dakota (UND) Citation will provide in situ observations of precipitation-sized particles, ice freezing nuclei and aerosol concentrations. As a complement to the UND Citation's in situ observations, the NASA ER-2 will provide a high altitude satellite simulator platform that carrying a Ka/Ku band radar and passive microwave radiometers (10-183 GHZ).

  1. LIDAR nleasurenlents of \\vind turbine wake Ineanderi ng J)l'j',lillllL'nl ul \\kcl1~lI1i('al Engineering. Fluid \\kchanic~. \\ills Koppcls /l.ik. DTU-I)uildll1,lC ..jil3.ll'llJ:1il':i1

    E-Print Network [OSTI]

    W wind turbine [1]. The wake dynamics was resol\\cd using a LIDAR based wind speed scanning system. RecentLIDAR nleasurenlents of \\vind turbine wake Ineanderi ng J)l'j',lillllL'nl ul \\kcl1~lI1i of identifying the wake characteristics associated \\\\ith a Ltrge KUt1l/2M\\V wino turbine. The turbine in question

  2. A precise narrow-beam filter infrared radiometer and its use with lidar in the ARM Program. Progress report, 1 December 1991--31 May 1992

    SciTech Connect (OSTI)

    Platt, C.M.R.

    1992-05-01T23:59:59.000Z

    The first six months of the grant (December 1991--May 1992) have been taken up with the design and specification for the new narrow-beam radiometer. The radiometer will be built and tested at the Division of Atmospheric Research over the next three months. Improved algorithms for obtaining cloud extinction have also been developed. It is proposed during 1993 to use the radiometer in conjunction with a new CSIRO 3-wavelength lidar in the ARM PROBE experiment at Kavieng, New Guinea, which is a test mission under tropical conditions for the ARM CART Tropical West Pacific site, and is part of the TOGA COARE experiment. During the latter part of 1992, the radiometer will be tested thoroughly and tested at the Division of Atmospheric Research, Aspendale.

  3. High Spectral Resolution Infrared and Raman Lidar Observations for the ARM Program: Clear and Cloudy Sky Applications

    SciTech Connect (OSTI)

    Henry Revercomb, David Tobin, Robert Knuteson, Lori Borg, Leslie Moy

    2009-06-17T23:59:59.000Z

    This grant began with the development of the Atmospheric Emitted Radiance Interferometer (AERI) for ARM. The AERI has provided highly accurate and reliable observations of downwelling spectral radiance (Knuteson et al. 2004a, 2004b) for application to radiative transfer, remote sensing of boundary layer temperature and water vapor, and cloud characterization. One of the major contributions of the ARM program has been its success in improving radiation calculation capabilities for models and remote sensing that evolved from the multi-year, clear-sky spectral radiance comparisons between AERI radiances and line-by-line calculations (Turner et al. 2004). This effort also spurred us to play a central role in improving the accuracy of water vapor measurements, again helping ARM lead the way in the community (Turner et al. 2003a, Revercomb et al. 2003). In order to add high-altitude downlooking AERI-like observations over the ARM sites, we began the development of an airborne AERI instrument that has become known as the Scanning High-resolution Interferometer Sounder (Scanning-HIS). This instrument has become an integral part of the ARM Unmanned Aerospace Vehicle (ARM-UAV) program. It provides both a cross-track mapping view of the earth and an uplooking view from the 12-15 km altitude of the Scaled Composites Proteus aircraft when flown over the ARM sites for IOPs. It has successfully participated in the first two legs of the “grand tour” of the ARM sites (SGP and NSA), resulting in a very good comparison with AIRS observations in 2002 and in an especially interesting data set from the arctic during the Mixed-Phase Cloud Experiment (M-PACE) in 2004. More specifically, our major achievements for ARM include 1. Development of the Atmospheric Emitted Radiance Interferometer (AERI) to function like a satellite on the ground for ARM, providing a steady stream of accurately calibrated spectral radiances for Science Team clear sky and cloud applications (Knuteson et al. 2004a), 2. Detailed radiometric calibration and characterization of AERI radiances, with uncertainty estimates established from complete error analyses and proven by inter-comparison tests (Knuteson et al. 2004b), 3. AERI data quality assessment and maintenance over the extended time frames needed to support ARM (Dedecker et al., 2005) 4. Key role in the radiative transfer model improvements from the AERI/LBLRTM QME (Turner et al. 2004) and AERI-ER especially from the SHEBA experiment (Tobin et al. 1999), 5. Contributed scientific and programmatic leadership leading to significant water vapor accuracy improvements and uncertainty assessments for the low to mid troposphere (Turner et al. 2003a, Revercomb et al. 2003), 6. Leadership of the ARM assessment of the accuracy of water vapor observations from radiosondes, Raman Lidar and in situ aircraft observations in the upper troposphere and lower stratosphere (Tobin et al. 2002, Ferrare et al. 2004), 7. New techniques for characterizing clouds from AERI (DeSlover et al. 1999, Turner 2003b, Turner et al. 2003b), 8. Initial design and development of the Scanning-HIS aircraft instrument and application to ARM UAV Program missions (Revercomb et al. 2005), and 9. Coordinated efforts leading to the use of ARM observations as a key validation tool for the high resolution Atmospheric IR Sounder on the NASA Aqua platform (Tobin et al. 2005a) 10. Performed ARM site and global clear sky radiative closure studies that shows closure of top-of-atmosphere flux at the level of ~1 W/m2 (Moy et al 2008 and Section 3 of this appendix) 11. Performed studies to characterize SGP site cirrus cloud property retrievals and assess impacts on computed fluxes and heating rate profiles (Borg et al. 2008 and Section 2 of this appendix).

  4. ARM - Measurement - Lidar polarization

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice

  5. QUANTIFYING FOREST ABOVEGROUND CARBON POOLS AND FLUXES USING MULTI-TEMPORAL LIDAR A report on field monitoring, remote sensing MMV, GIS integration, and modeling results for forestry field validation test to quantify aboveground tree biomass and carbon

    SciTech Connect (OSTI)

    Lee Spangler; Lee A. Vierling; Eva K. Stand; Andrew T. Hudak; Jan U.H. Eitel; Sebastian Martinuzzi

    2012-04-01T23:59:59.000Z

    Sound policy recommendations relating to the role of forest management in mitigating atmospheric carbon dioxide (CO{sub 2}) depend upon establishing accurate methodologies for quantifying forest carbon pools for large tracts of land that can be dynamically updated over time. Light Detection and Ranging (LiDAR) remote sensing is a promising technology for achieving accurate estimates of aboveground biomass and thereby carbon pools; however, not much is known about the accuracy of estimating biomass change and carbon flux from repeat LiDAR acquisitions containing different data sampling characteristics. In this study, discrete return airborne LiDAR data was collected in 2003 and 2009 across {approx}20,000 hectares (ha) of an actively managed, mixed conifer forest landscape in northern Idaho, USA. Forest inventory plots, established via a random stratified sampling design, were established and sampled in 2003 and 2009. The Random Forest machine learning algorithm was used to establish statistical relationships between inventory data and forest structural metrics derived from the LiDAR acquisitions. Aboveground biomass maps were created for the study area based on statistical relationships developed at the plot level. Over this 6-year period, we found that the mean increase in biomass due to forest growth across the non-harvested portions of the study area was 4.8 metric ton/hectare (Mg/ha). In these non-harvested areas, we found a significant difference in biomass increase among forest successional stages, with a higher biomass increase in mature and old forest compared to stand initiation and young forest. Approximately 20% of the landscape had been disturbed by harvest activities during the six-year time period, representing a biomass loss of >70 Mg/ha in these areas. During the study period, these harvest activities outweighed growth at the landscape scale, resulting in an overall loss in aboveground carbon at this site. The 30-fold increase in sampling density between the 2003 and 2009 did not affect the biomass estimates. Overall, LiDAR data coupled with field reference data offer a powerful method for calculating pools and changes in aboveground carbon in forested systems. The results of our study suggest that multitemporal LiDAR-based approaches are likely to be useful for high quality estimates of aboveground carbon change in conifer forest systems.

  6. A precise passive narrow-beam filter infrared radiometer and its use with LIDAR in the ARM program. Progress report, 1 June 1992--31 May 1993

    SciTech Connect (OSTI)

    Platt, C.M.R.

    1993-05-01T23:59:59.000Z

    The work done divides conveniently into two parts. First, the completion of the design and manufacture of the new narrow-beam radiometer, which occupied the period of July to December, 1992. The second part of the report concerns participation of the CSIRO Division of Atmospheric Research (DAR) Lidar/radiometer team in the ARM PROBE experiment at Kavieng, New Ireland, Papua New Guinea as part of the international TOGA COARE experiment. The DAR team participated for about one month from mid-January. The PROBE experiment allowed the new radiometer to be tested under field conditions, a test which was very successful, with very few teething problems. It is proposed during the rest of 1993 and during 1994 to make further tests with the radiometer and particularly to look at using a stirling cycle liquid nitrogen detector to obviate the need for supplies of liquid nitrogen. It is proposed further during 1994 to carry out a thorough analysis of the PROBE data and collaborate with other US PROBE participants in studying and interpreting the observations as a whole. Some further work with the new ARM radiometer will be done during the CSIRO SOCEX experiment.

  7. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulse Lidar-Derived

  8. Using Radar, Lidar and Radiometer Data from NSA and SHEBA to Quantify Cloud Property Effects on the Surface Heat Budget in the Arctic

    SciTech Connect (OSTI)

    Janet Intrieri; Mathhew Shupe

    2005-01-01T23:59:59.000Z

    Cloud and radiation data from two distinctly different Arctic areas are analyzed to study the differences between coastal Alaskan and open Arctic Ocean region clouds and their respective influence on the surface radiation budget. The cloud and radiation datasets were obtained from (1) the DOE North Slope of Alaska (NSA) facility in the coastal town of Barrow, Alaska, and (2) the SHEBA field program, which was conducted from an icebreaker frozen in, and drifting with, the sea-ice for one year in the Western Arctic Ocean. Radar, lidar, radiometer, and sounding measurements from both locations were used to produce annual cycles of cloud occurrence and height, atmospheric temperature and humidity, surface longwave and shortwave broadband fluxes, surface albedo, and cloud radiative forcing. In general, both regions revealed a similar annual trend of cloud occurrence fraction with minimum values in winter (60-75%) and maximum values during spring, summer and fall (80-90%). However, the annual average cloud occurrence fraction for SHEBA (76%) was lower than the 6-year average cloud occurrence at NSA (92%). Both Arctic areas also showed similar annual cycle trends of cloud forcing with clouds warming the surface through most of the year and a period of surface cooling during the summer, when cloud shading effects overwhelm cloud greenhouse effects. The greatest difference between the two regions was observed in the magnitude of the cloud cooling effect (i.e., shortwave cloud forcing), which was significantly stronger at NSA and lasted for a longer period of time than at SHEBA. This is predominantly due to the longer and stronger melt season at NSA (i.e., albedo values that are much lower coupled with Sun angles that are somewhat higher) than the melt season observed over the ice pack at SHEBA. Longwave cloud forcing values were comparable between the two sites indicating a general similarity in cloudiness and atmospheric temperature and humidity structure between the two regions.

  9. Microtopographic characterization of ice-wedge polygon landscape in Barrow, Alaska: a digital map of troughs, rims, centers derived from high resolution (0.25 m) LiDAR data

    SciTech Connect (OSTI)

    Gangodagamage, Chandana; Wullschleger, Stan

    2014-07-03T23:59:59.000Z

    The dataset represents microtopographic characterization of the ice-wedge polygon landscape in Barrow, Alaska. Three microtopographic features are delineated using 0.25 m high resolution digital elevation dataset derived from LiDAR. The troughs, rims, and centers are the three categories in this classification scheme. The polygon troughs are the surface expression of the ice-wedges that are in lower elevations than the interior polygon. The elevated shoulders of the polygon interior immediately adjacent to the polygon troughs are the polygon rims for the low center polygons. In case of high center polygons, these features are the topographic highs. In this classification scheme, both topographic highs and rims are considered as polygon rims. The next version of the dataset will include more refined classification scheme including separate classes for rims ad topographic highs. The interior part of the polygon just adjacent to the polygon rims are the polygon centers.

  10. Microtopographic characterization of ice-wedge polygon landscape in Barrow, Alaska: a digital map of troughs, rims, centers derived from high resolution (0.25 m) LiDAR data

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

    Gangodagamage, Chandana; Wullschleger, Stan

    The dataset represents microtopographic characterization of the ice-wedge polygon landscape in Barrow, Alaska. Three microtopographic features are delineated using 0.25 m high resolution digital elevation dataset derived from LiDAR. The troughs, rims, and centers are the three categories in this classification scheme. The polygon troughs are the surface expression of the ice-wedges that are in lower elevations than the interior polygon. The elevated shoulders of the polygon interior immediately adjacent to the polygon troughs are the polygon rims for the low center polygons. In case of high center polygons, these features are the topographic highs. In this classification scheme, both topographic highs and rims are considered as polygon rims. The next version of the dataset will include more refined classification scheme including separate classes for rims ad topographic highs. The interior part of the polygon just adjacent to the polygon rims are the polygon centers.

  11. Radiative Energy Balance in the Tropical Tropopause Layer: An Investigation with ARM Data

    SciTech Connect (OSTI)

    Fu, Qiang

    2013-10-22T23:59:59.000Z

    The overall objective of this project is to use the ARM observational data to improve our understanding of cloud-radiation effects in the tropical tropopause layer (TTL), which is crucial for improving the simulation and prediction of climate and climate change. In last four and half years, we have been concentrating on (i) performing the comparison of the ice cloud properties from the ground-based lidar observations with those from the satellite CALIPSO lidar observations at the ARM TWP sites; (ii) analyzing TTL cirrus and its relation to the tropical planetary waves; (iii) calculating the radiative heating rates using retrieved cloud microphysical properties by combining the ground-based lidar and radar observations at the ARM TWP sites and comparing the results with those using cloud properties retrieved from CloudSat and CALIPSO observations; (iv) comparing macrophysical properties of tropical cirrus clouds from the CALIPSO satellite and from ground-based micropulse and Raman lidar observations; (v) improving the parameterization of optical properties of cirrus clouds with small effective ice particle sizes; and (vi) evaluating the enhanced maximum warming in the tropical upper troposphere simulated by the GCMs. The main results of our research efforts are reported in the 12 referred journal publications that acknowledge the DOE Grant No. DE-FG02-09ER64769.

  12. Development and Deployment of a Compact Eye-Safe Scanning Differential absorption Lidar (DIAL) for Spatial Mapping of Carbon Dioxide for Monitoring/Verification/Accounting at Geologic Sequestration Sites

    SciTech Connect (OSTI)

    Repasky, Kevin

    2014-03-31T23:59:59.000Z

    A scanning differential absorption lidar (DIAL) instrument for monitoring carbon dioxide has been developed. The laser transmitter uses two tunable discrete mode laser diodes (DMLD) operating in the continuous wave (cw) mode with one locked to the online absorption wavelength and the other operating at the offline wavelength. Two in-line fiber optic switches are used to switch between online and offline operation. After the fiber optic switch, an acousto- optic modulator (AOM) is used to generate a pulse train used to injection seed an erbium doped fiber amplifier (EDFA) to produce eye-safe laser pulses with maximum pulse energies of 66 {micro}J, a pulse repetition frequency of 15 kHz, and an operating wavelength of 1.571 {micro}m. The DIAL receiver uses a 28 cm diameter Schmidt-Cassegrain telescope to collect that backscattered light, which is then monitored using a photo-multiplier tube (PMT) module operating in the photon counting mode. The DIAL instrument has been operated from a laboratory environment on the campus of Montana State University, at the Zero Emission Research Technology (ZERT) field site located in the agricultural research area on the western end of the Montana State University campus, and at the Big Sky Carbon Sequestration Partnership site located in north-central Montana. DIAL data has been collected and profiles have been validated using a co-located Licor LI-820 Gas Analyzer point sensor.

  13. ls phytoextraction a suitable green treatment for metal-contaminated Huguet S. 1,2,3, Sarret G.14 Bert V.3 * , Isaure M.P.l,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , 12/Z, 7340, Colfonlaine Belgique. Àbstract. The cleaning of waterways by rcgular dredging générâtes, speciation Introduction In the Northern part of France, the maintenance of waterways by regular dredging accumulated in polluted soils (phytoextraction) might represent an alternative low cost rernediation strategy

  14. Systematic Sampling of Scanning Lidar Swaths 

    E-Print Network [OSTI]

    Marcell, Wesley Tyler

    2011-02-22T23:59:59.000Z

    ih sty n a n fvs h (4) where the ah,2i are, again, successive differences of units, but now treating the strata as successively grouped in pairs with two units per pair. That is, it pools the data from each pair of strata. Estimator (4...

  15. Whirlwind 1 Lidar fr Windmessungen auf Windenergieanlagen

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    Klassifikationsvorschriften des Germanischen Lloyd, Geräteklasse G. EMV: IEC 61000-4-x Emission: nach GL EMC 2 Umgebung: IEC 60068-2-x (trockene Hitze, Kälte, Salznebel) Vibration: IEC 600068-2-6 Augensicherheit: Laserklasse 1 nach IEC-60825-1 Alle genannten Daten sind vorläufig. Technische Änderungen von Whirlwind 1 und seinen

  16. Simplified Homodyne Detection for FM Chirped Lidar

    E-Print Network [OSTI]

    Adany, Peter

    2007-12-14T23:59:59.000Z

    ...........................................................................18 2.3 PULSE COMPRESSION........................................................................................19 A Basic Pulse Compression Method................................................................20 Linear FM Chirp with Analog Mixing.............................................................................................40 Thermal Noise....................................................................................................41 Quantum (Shot) Noise.......................................................................................42 Additive White...

  17. ARM - Campaign Instrument - co2lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearchSOLICITATIONIMODIgovInstrumentsasticryo Comments? We wouldair Comments?

  18. ARM - Campaign Instrument - lidar-dial

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492air Comments? We would love to hear from you! Send usgovInstrumentslandcover-satgovInstrumentslidar-dial

  19. Comments on: ARM Raman Lidar Applications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i tCollaboration MarchCanadian2016Department

  20. Comments on: ARM Raman Lidar Development

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

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  1. Sandia Energy - ARM Raman Lidar Applications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand Requirements RecentlyElectronicResourcesjobsJulyCatalysts and2015 VIIIApplications Home

  2. Sandia Energy - ARM Raman Lidar Development

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand Requirements RecentlyElectronicResourcesjobsJulyCatalysts and2015 VIIIApplications

  3. LiDAR | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano,Lakefront Tow(Redirected from Lewisburg,LiDAR Jump to:

  4. 9/2/08 9:42 AMRice professor: Granite countertops may cause you harm | Chron.com -Houston Chronicle Page 1 of 3http://www.chron.com/disp/story.mpl/moms/5908630.html

    E-Print Network [OSTI]

    Llope, William J.

    9/2/08 9:42 AMRice professor: Granite countertops may cause you harm | Chron.com - Houston Be wary of granite that glows Rice professor says countertops may be tainted with uranium By ALLAN TURNER. Some granite countertops, he says, contain high levels of uranium, which, by generating gamma radiation

  5. Mars Climate Orbiter Mishap Investigation Board

    E-Print Network [OSTI]

    Leveson, Nancy

    ) 3 List of Consultants 4 Acknowledgements 5 Executive Summary 6 1. Mars Climate Orbiter (MCO) and Mars Polar Lander (MPL) Project Descriptions 9 2. MCO Mishap 13 3. Method of Investigation 15 4. MCO Root Causes and MPL Recommendations 16 5. MCO Contributing Causes and Observations and MPL

  6. An example of constrained evolution: June 13, 2006 A.Alekseenko

    E-Print Network [OSTI]

    Alekseenko, Alexander

    to the equation Lpqr lij pqr = lij, are given by = 3 2 : 1pqr = 1 3 [2npm(qlr) - mpl(qnr) - lpn(qmr)] 2pqr = mpl(q - npn(q)mr)] 5pqr = 1 3 [lp(nqnr - mqmr) - (npn(q - mpm(q)lr)] = 0 : 6pqr = npm(qlr) + mpl(qnr) + lpn

  7. angle imaging lidar: Topics by E-print Network

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

    sensing. I. David J. Diner; Jewel C. Beckert; Terrence H. Reilly; Carol J. Bruegge; James E. Conel; Ralph A. Kahn; John V. Martonchik; Thomas P. Ackerman; Roger Davies;...

  8. Lidar characterization of crystalline silica generation and gravel plant

    E-Print Network [OSTI]

    Trzepla-Nabaglo, K.; Shiraki, R.; Holm'en, B. A.

    2006-01-01T23:59:59.000Z

    of aggregate trucks on the property to give emission factorsquartz emission factors a PM 10 (total # trucks) (kg/truck)emission rates could be explained by the number of aggregate trucks and

  9. Wind velocity measurements using a pulsed LIDAR system: first results

    E-Print Network [OSTI]

    Peinke, Joachim

    . A laser beam of 1.54 µm wavelength takes measurements of the wind speed in beamwise direction. To obtain the three-dimensinal wind vector, the beam is inclined by 30 from vertical direction and measurements 12345 t [s] vh[m/s] Figure 2. Segment of measured time series of the horizontal wind speed magnitude vh

  10. Lidar characterization of crystalline silica generation and gravel plant

    E-Print Network [OSTI]

    Trzepla-Nabaglo, K.; Shiraki, R.; Holm'en, B. A.

    2006-01-01T23:59:59.000Z

    Hazardous Materials 132 (2006) 14–25 plumes than the plumes identi?ed at the other locations.Hazardous Materials 132 (2006) 14–25 Fig. 2. (a) Relative locations

  11. AIRBORNE HIGH SPECTRAL RESOLUTION LIDAR MEASUREMENTS OF ATMOSPHERIC AEROSOLS

    E-Print Network [OSTI]

    the evolution and transport of pollution from Mexico City. The second major experiment was the Texas Air Quality Union 2007 Joint Assembly Acapulco, Mexico May 22-25, 2007 Environmental Sciences Department Research Observations (MILAGRO) /Megacity Aerosol Experiment in Mexico City (MAX

  12. Automatic Construction of Building Footprints from Airborne LIDAR Data

    E-Print Network [OSTI]

    Chen, Shu-Ching

    data are essential for construc- tion of urban landscape models, assessment of urban heat island effect for extraction of building footprints. Manual derivation of building geometric data from a remote sensing image due to the influence of sun shadow and relief displacement of high buildings in remote sensing images

  13. RisR1212(EN) Meteorology and lidar data

    E-Print Network [OSTI]

    . Jørgensen Risø National Laboratory, Roskilde, Denmark May 2002 #12;Abstract This report describes sensors, thermocouple arrays, a fully instrumented release rig, a passive smoke machine, a meteorological were set out in the far range for the purpose of studying environ- mental effects. This report deals

  14. LIDAR IN COASTAL STORM SURGE MODELING: MODELING LINEAR RAISED FEATURES

    E-Print Network [OSTI]

    Central Florida, University of

    and Dr. Tarig Ali agreed to serve on my thesis committee. Finally, I would like to thank Karen Windon

  15. aircraft merged lidar: Topics by E-print Network

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

    them. Federations are unions of DBMs the size of federations and how to choose some DBMs to merge them into a larger one is a combi- natorial David, Alexandre 110 Web...

  16. Lane estimation for autonomous vehicles using vision and LIDAR

    E-Print Network [OSTI]

    Huang, Albert Shuyu

    2010-01-01T23:59:59.000Z

    Autonomous ground vehicles, or self-driving cars, require a high level of situational awareness in order to operate safely and eciently in real-world conditions. A system able to quickly and reliably estimate the location ...

  17. absorption lidar transmitter: Topics by E-print Network

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

    duration of the data pulse. The encoder is enabled only when the ADC has digitized the ECG signal, thus Serdijn, Wouter A. 274 A Low Power CMOS Chirp-Spread-Spectrum OOK...

  18. Hamburg, September 2003 A European Aerosol Research Lidar Network

    E-Print Network [OSTI]

    Centre on Insular Coastal Dynamics, University of Malta, La Valletta, Malta M. Zavrtanik Polytechnic Nova

  19. LiDAR (Laney, 2005) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to: navigation,Oklahoma:LeyteLiDAR

  20. LiDAR (Lewicki & Oldenburg) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:

  1. LiDAR (Lewicki & Oldenburg, 2004) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004) Jump to:

  2. LiDAR (Lewicki & Oldenburg, 2005) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004) Jump to:LiDAR

  3. LiDAR (Monaster And Coolbaugh, 2007) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004) Jump

  4. ARM - Field Campaign - Boundary Layer CO2 Using CW Lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032)8Li (59AJ76)ARM2,govCampaignsAircraftCloud ODgovCampaignsBoundary

  5. ARM - Field Campaign - Lidar support for ICECAPS at Summit, Greenland

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032)8LigovCampaignsCLEX-5govCampaignsFall-Clouds

  6. Lidar Inter-Comparison Exercise Final Campaign Report A Protat

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |Is Your HomeLatest Newsbiomass to fuelLibraryTeaming Up

  7. ARM - PI Product - Finnish Meteorological Institute Doppler Lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDCnarrowbandheat

  8. ARM - PI Product - Raman lidar/AERI PBL Height Product

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDCnarrowbandheatProductsISDACProductsRadiative Flux

  9. LiDAR Technology | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us count the ways. We've13,Lewis

  10. Cloud properties derived from the High Spectral Resolution Lidar during

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t zManufacturing:DOE NationalCommittee

  11. Advanced Lidars for ARM: What Would We Get?

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973 1BP-14 Power andAdvancedCMWG Breakout Session 2009 ARM

  12. Use of a Lidar Forward Model for Global Comparisons of Cloud Fraction between the ICESat Lidar and the ECMWF Model

    E-Print Network [OSTI]

    Hogan, Robin

    to underestimate cloud cover in the extra-tropical oceans, the trade wind cumulus, the stratocumulus sheets off-to-backscatter ratio and effective radius affect the forward modeled mean cloud fraction by no more than 10%. 1. Introduction Clouds play a major role in the Earth's radiation bud- get and predictions of future climate

  13. Reduction in Fabrication Costs of Gas Diffusion Layers

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

    Could influence membrane durability MPL Loading Controls the pore structure at the CCMCL interface Permeability Relates to water management in a stack Basis Weight Impacts...

  14. Macroprogramming Heterogeneous Sensor Networks Using Asad Awan Suresh Jagannathan Ananth Grama

    E-Print Network [OSTI]

    Jagannathan, Suresh

    - ment for mPL in heterogeneous resource-constrained sensor net- works. COSMOS facilitates composition component basis library to add rich macroprogramming abstractions to mPL, tailored to domain and resource measurements. We present comprehen- sive experimental evaluation using macro- and micro- benchmarks

  15. An annual cycle of Arctic cloud characteristics observed by radar and lidar at SHEBA

    E-Print Network [OSTI]

    Shupe, Matthew

    distribution of cloud boundary heights, and occurrence of liquid phase in clouds are determined from radar-observed clouds containing liquid was 73% for the year. The least amount of liquid water phase was observed during-detected clouds. Liquid was distributed in a combination of all-liquid and mixed phase clouds, and was detected

  16. Multi-temporal Terrestrial Lidar for Estimating Individual Tree Dimensions and Biomass Change

    E-Print Network [OSTI]

    Srinivasan, Shruthi

    2013-10-30T23:59:59.000Z

    -destructive methods. This study developed algorithms to extract individual tree height, diameter at breast height (DBH), and crown width in plots at Ecosystem Science and Management (ESSM) research area and Huntsville, Texas. Further, the influence of scan settings...

  17. Estimating the Wind Resource in Uttarakhand: Comparison of Dynamic Downscaling with Doppler Lidar Wind Measurements

    SciTech Connect (OSTI)

    Lundquist, J. K.; Pukayastha, A.; St. Martin, C.; Newsom, R.

    2014-03-01T23:59:59.000Z

    Previous estimates of the wind resources in Uttarakhand, India, suggest minimal wind resources in this region. To explore whether or not the complex terrain in fact provides localized regions of wind resource, the authors of this study employed a dynamic down scaling method with the Weather Research and Forecasting model, providing detailed estimates of winds at approximately 1 km resolution in the finest nested simulation.

  18. An initial assessment of the Robust And Compact Hybrid Environmental Lidar

    E-Print Network [OSTI]

    Oxford, University of

    -tripled Nd:YAG laser with an average pulse energy of 65 mJ. The return signal is observed coaxially, includ- ing a ceiliometer, cloud radar, various li- dars, radiometers, and surface meteorol- ogy in the morning. This behaviour is repeated the next day. During this time, PBL height remains unusually high

  19. Mapping forests with Lidar provides flexible, accurate data with many uses

    E-Print Network [OSTI]

    Kelly, Maggi; Tommaso, Stefania Di

    2015-01-01T23:59:59.000Z

    27. Chen Q, Baldocchi D, Gong P, Kelly M. 2006. IsolatingRem S 72:923–32. Chen Q, Gong P, Baldocchi D, Tian Y. 2007.data. J Forest 108:436–43. Gong P, Biging GS, Lee SM, et al.

  20. Delineating Individual Trees from Lidar Data: A Comparison of Vector- and Raster-based Segmentation Approaches

    E-Print Network [OSTI]

    Kelly, Maggi

    2013-01-01T23:59:59.000Z

    spatial wavelet analysis [5], k-means clustering [21], and61]. The RBF network uses k-means clustering to determine

  1. Mapping surface fuels using LIDAR and multispectral data fusion for fire behavior modeling 

    E-Print Network [OSTI]

    Mutlu, Muge

    2009-05-15T23:59:59.000Z

    Fires have become intense and more frequent in the United States. Improving the accuracy of mapping fuel models is essential for fuel management decisions and explicit fire behavior prediction for real-time support of suppression tactics...

  2. LiDAR observations of offshore winds at future wind turbine operating heights

    E-Print Network [OSTI]

    at the Horns Rev offshore wind farm. The influence of atmospheric stability on the surface layer wind shear of offshore wind farms in the coming years. In contrast with the situation over land, the knowledge turbine manufacturers and wind farm developers, although the offshore environment represents other

  3. Quantifying Surface Subsidence along US Highway 50, Reno County, KS using Terrestrial LiDAR

    E-Print Network [OSTI]

    Herrs, Andrew J.

    2010-04-23T23:59:59.000Z

    of karst features by evaporite dissolution is quick and unpredictable. Evaporite rock layers cover a large area in the subsurface of the North America and elsewhere in the world. The mechanisms in which these evaporites dissolve are important...). This 5 free access to undersaturated water rapidly leaches away salt in the subsurface thereby creating large void spaces. Effects of Salt Dissolution The dissolution mechanisms described in the previous section give way to instabilities...

  4. Modeling Plot-Level Biomass and Volume Using Airborne and Terrestrial Lidar Measurements

    E-Print Network [OSTI]

    Sheridan, Ryan D.

    2012-07-16T23:59:59.000Z

    The United States Forest Service (USFS) Forest Inventory and Analysis (FIA) program provides a diverse selection of data used to assess the status of the nation’s forested areas using sample locations dispersed throughout the country. Airborne...

  5. Mapping surface fuels using LIDAR and multispectral data fusion for fire behavior modeling

    E-Print Network [OSTI]

    Mutlu, Muge

    2009-05-15T23:59:59.000Z

    outputs using fuel model maps, which differ in accuracy, in east Texas. Estimates of fuel models were compared with in situ data collected over 62 plots. Supervised image classification methods provided better accuracy (90.10%) with the fusion of airborne...

  6. Constructing a GIS-based 3D urban model using LiDAR and aerial photographs

    E-Print Network [OSTI]

    Lin, Wei-Ming

    2005-02-17T23:59:59.000Z

    ; Rau and Chen 2001; Shiode 2001; Zhou et al. 2004). The 3D urban modeling technique enables urban residents to visualize future urban construction and development. It also supports standard activities of urban design and city planning and allows... of geometric information about urban objects, and it is an efficient tool for designing and creating urban objects (Sinning-Meister et al 1996). The contemporary CAD systems also offer full 3D rendering capability to visualize urban objects and the urban...

  7. Scanning lidar based atmospheric monitoring for fluorescence detectors of cosmic showers

    E-Print Network [OSTI]

    Zavrtanik, Marko

    .elsevier.com/locate/astropart #12;the integral of EM particle density Nem along the shower direction x, Eem ¼ K Z Nemðx�dx ð1� with K % 2:2 MeV cm2 /g, where x is measured in units of longitudinal air density (g/cm2 ). Eem

  8. Semi-Automated DIRSIG Scene Modeling from 3D LIDAR and Passive Imaging Sources

    E-Print Network [OSTI]

    Kerekes, John

    powerful tool for algorithm testing and sensor evaluation. However, the extensive time required to create given the parameters of the sensor. This may be done to evaluate an existing sensor under a host synthetic multispectral and hyperspectral images from the visible to long wave infrared (0.4 to 20 microns

  9. Improved Approach to Lidar Airport Obstruction Surveying Using Full-Waveform Data

    E-Print Network [OSTI]

    Nowak, Robert

    and approaches. The data are used by the Federal Aviation Administration (FAA) in designing runway approach selected and ordered based on the objectives of meeting Federal Aviation Administration requirements Administration's National Geodetic Survey, in collaboration with multiple organizations, has conducted research

  10. Lidar studies of interannual, seasonal, and diurnal variations of polar mesospheric clouds at the South Pole

    E-Print Network [OSTI]

    Chu, Xinzhao

    region and in the upwelling vertical wind, which are mainly caused by different solar forcing in two's orbital eccentricity. Gravity wave forcing also contributes to these differences. INDEX TERMS: 0340 water vapor and temper- atures, and possibly as an indicator of long-term global climate change [Thomas

  11. Delineating Individual Trees from Lidar Data: A Comparison of Vector- and Raster-based Segmentation Approaches

    E-Print Network [OSTI]

    Kelly, Maggi

    2013-01-01T23:59:59.000Z

    Germany, 2012. 44. Baatz, M. ; Hoffmann, C. ; Willhauck, G.interest were segmented. Baatz, Hoffmann and Willhauck [44

  12. A light detection and ranging (lidar) study of the Sierra Nevada

    E-Print Network [OSTI]

    Phelps, Gary M. II

    2011-01-01T23:59:59.000Z

    1997). "The Stanford Digital Library metadata architecture."International Journal on Digital Libraries 1(2): 108-121.working web-based digital library for environmental

  13. Delineating Individual Trees from Lidar Data: A Comparison of Vector- and Raster-based Segmentation Approaches

    E-Print Network [OSTI]

    Kelly, Maggi

    2013-01-01T23:59:59.000Z

    LIBLINEAR: A library for large linear classification. J.is a library for large-scale linear classification that

  14. An investigation of the depolarization of backscattered electromagnetic waves using a lidar polarimeter

    E-Print Network [OSTI]

    Wilhelmi, Gary Joe

    1973-01-01T23:59:59.000Z

    -2 Values of Q' for Rough Surfaces 91 V-3 C-1 C-2 Values of Volume Reflection Coefficients for Rough Surfaces Turbid Water Data Rough Surface Data 140 141 LIST OF FIGURFS Figure ~pa e II-1 Scattering geometry for the surface scatter... components are given by: 19 H, (a. . ~, ) Z-, E (ct, - g, ) (n. x 7, ) Egg (I I- 2) The components in the plane of incidence are: Ea = ECa, , n, )n. + Ccz, -d ) 4. 3 E H = -(o. , -d )+ (I 1-3) The local surface currents are now found. If the sub...

  15. Mapping forests with Lidar provides flexible, accurate data with many uses

    E-Print Network [OSTI]

    Kelly, Maggi; Tommaso, Stefania Di

    2015-01-01T23:59:59.000Z

    and high-resolution optical sensors such as Worldview-2associ- ated with optical sensors, which can make moderate-A complementary Quickbird (optical sensors of moderate and

  16. Assessing Available Woody Plant Biomass on Rangelands with Lidar and Multispectral Remote Sensing 

    E-Print Network [OSTI]

    Ku, Nian-Wei

    2012-07-16T23:59:59.000Z

    products. Mesquite trees, a type of woody plant, are a proven source of bioenergy feedstock found on semi-arid lands. The overall objectives of this study were to develop algorithms for determining woody plant biomass on rangelands in Texas at plot...

  17. Object-Based Image Analysis of Downed Logs in Disturbed Forested Landscapes Using Lidar

    E-Print Network [OSTI]

    Kelly, Maggi

    2011-01-01T23:59:59.000Z

    quantity and location of downed logs in forests is important for assessing fire risk [4,5], measuring dead biomass

  18. Lidar Remote Sensing of the Canopy Structure and Biophysical Properties of

    E-Print Network [OSTI]

    Lefsky, Michael

    infrequently measured, from either field or remote used in predictive equations generated by the stepwise Laboratory, Pacific exceeds 3 has been less successful (e.g., Sader et al., Northwest Research Station, Corvallis Smithsonian Environmental Research Center, Edgewater, primarily in the temperate and tropical

  19. Field Testing LIDAR Based Feed-Forward Controls on the NREL Controls Advanced Research Turbine: Preprint

    SciTech Connect (OSTI)

    Scholbrock, A. K.; Fleming, P. A.; Fingersh, L. J.; Wright, A. D.; Schlipf, D.; Haizmann, F.; Belen, F.

    2013-01-01T23:59:59.000Z

    Wind turbines are complex, nonlinear, dynamic systems driven by aerodynamic, gravitational, centrifugal, and gyroscopic forces. The aerodynamics of wind turbines are nonlinear, unsteady, and complex. Turbine rotors are subjected to a chaotic three-dimensional (3-D) turbulent wind inflow field with imbedded coherent vortices that drive fatigue loads and reduce lifetime. In order to reduce cost of energy, future large multimegawatt turbines must be designed with lighter weight structures, using active controls to mitigate fatigue loads, maximize energy capture, and add active damping to maintain stability for these dynamically active structures operating in a complex environment. Researchers at the National Renewable Energy Laboratory (NREL) and University of Stuttgart are designing, implementing, and testing advanced feed-back and feed-forward controls in order to reduce the cost of energy for wind turbines.

  20. Submarine fluorescence lidar for environmental monitoring Stefan Harsdorf, Manfred Janssen, Rainer Reuter and Bernhard Wachowicz

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    Santosa) Eco-Ethology Research Unit, ISPA--Instituto Universitario, Rua Jardim do Tabaco 34, Lisboa, P dos Mam´iferos Marinhos, Rua Alto do Duque 45, Lisboa, P-1400-009, Portugal Emanuel J. Gonc¸alves Eco of Setu´bal, in Portugal, required the removal of a 14-m deep rocky outcrop at the ship maneuver area

  1. Systematic lidar observations of Saharan dust over Europe in the frame of EARLINET (20002002)

    E-Print Network [OSTI]

    , University of Malta, Valletta, Malta. 12 Now at World Meteorological Organization, Geneva, Switzerland. 13

  2. LiDAR At Chocolate Mountains Area (Alm, Et Al., 2010) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004)

  3. LiDAR At Dixie Valley Geothermal Area (Helton, Et Al., 2011) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004)Information

  4. LiDAR At Gabbs Valley Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg, 2004)InformationAt

  5. LiDAR At Twenty-Nine Palms Area (Page, Et Al., 2010) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg,

  6. LiDAR At Twenty-Nine Palms Area (Sabin, Et Al., 2010) | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana:NewJump to:Oldenburg,Information Palms

  7. Airborne LiDAR Detects Selectively Logged Tropical Forest Even in an Advanced Stage of Recovery

    E-Print Network [OSTI]

    Kent, Rafi; Lindsell, Jeremy A.; Laurin, Gaia Vaglio; Valentini, Riccardo; Coomes, David A.

    2015-01-01T23:59:59.000Z

    logged tropical forests: the attained and the attainable. Conserv. Lett. 2012, 5, 296–303. 10. Silver, W. L.; Ostertag, R.; Lugo, a. E. The Potential for Carbon Sequestration Through Reforestation of Abandoned Tropical Agricultural and Pasture Lands... forests can be of high conservation value [2,7–9] and act as globally-important carbon sinks [9–12]. However, there is much uncertainty regarding the changing extent of regenerating forests, their rate and stage of recovery, and the influence...

  8. LIDAR measurements of wind turbine wake dyn_amics and comparison with an engineering model

    E-Print Network [OSTI]

    . Madsen, K. Thomsen, and T.J. Larsen. VVllke Ineandering - II pragmatic approach. Wind Energy. Accepted Endovved Chair of Wind Energy University of Stuttgart, Germany 2 Ris0 DTU National Laboratory Technical. In European Wind Energy Conference {711d Exhibitioll /lvIiloll Itoly. EWEC, May 2007. [2J C.C. Larsen, H. Aa

  9. Estimate of the global distribution of stratiform supercooled liquid water clouds using the LITE lidar

    E-Print Network [OSTI]

    Hogan, Robin

    them to generally have a greater effect on the net radiative fluxes than any ice clouds in the profileEstimate of the global distribution of stratiform supercooled liquid water clouds using the LITE layers that have a much larger radiative impact than ice clouds of the same water content because

  10. Retrieving stratocumulus drizzle parameters using Doppler radar and lidar EWAN J. O'CONNOR

    E-Print Network [OSTI]

    Hogan, Robin

    types globally with a profound effect on the Earth's radiation budget, and the drizzle process-layer clouds are one of the most signifi- cant components of the shortwave radiation budget of the Earth. The drizzle process may also have implications for the radiative properties of such clouds (Feingold et al

  11. Polarized Micro Pulse Lidars R. L. Coulter and T. J. Martin

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPOPetroleum38 (1996)representative ofPlantandPHYSOR 2014and

  12. Posters Scanning Raman Lidar Measurements of Atmospheric Water Vapor and Aerosols

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah Project Office PressPostdoctoraldecadal observations719711 Posters5

  13. LiDAR At Glass Buttes Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano,Lakefront Tow(Redirected from Lewisburg,

  14. DOE/SC-ARM/TR-120 Raman Lidar Profiles-Temperature

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration wouldDECOMPOSITION OF CALCIUMCOSTDOENuclear1382 THEDOE0-354-1502225

  15. A Comparison of Cirrus Cloud Visible Optical Depth Derived from Lidar

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032) -Less isNFebruaryOctober 2, AlgeriaQ1 Q2 Q3(SC)

  16. Structural Analysis of Southern Dixie Valley using LiDAR and Low-Sun-Angle

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎SolarCityInformationStopwattchStratton

  17. Raman Lidar Measurements of Aerosols and Water Vapor During the May 2003 Aerosol IOP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Radiation ProtectionRaising funds for a cure Raising

  18. ARM Climate Modeling Best Estimate Lamont, OK Statistical Summary (ARMBE-CLDRAD SGPC1)

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

    McCoy, Renata; Xie, Shaocheng

    Calculate monthly mean diurnal cycle based on the hourly CMBE data with qcflag >=-1 (>30% valid data within the averaged hour). For 2-D clouds, only data over the period when both MMCR and MPL were working are used.

  19. Performance and mass transport in open metallic element architecture fuel cells at ultra-high current density

    E-Print Network [OSTI]

    Mench, Matthew M.

    contact resistance. Electrochemical impedance spectroscopy (EIS) revealed great improvement in mass, electrochemical impedance spectroscopy; MEA, membrane electrolyte assembly; MPL, micro porous layer; OME, open 16801, USA c Nuvera Fuel Cells Inc., Billerica, MA 01821, USA d Electrochemical Energy Storage

  20. The Influence of Nearshore Bars on Infragravity Energy at the Shoreline

    E-Print Network [OSTI]

    Cox, Nicholas Carroll

    2012-02-14T23:59:59.000Z

    ............................................................................................. 40? Figure 3-3? Location of LiDAR Data .......................................................................... 48? Figure 3-4? Example of Raw LiDAR data from Panama City Beach, FL. ................. 48? Figure 3-5? Bar Locations from LiDAR Data...

  1. Exploring the relationships between vegetation measurements and temperature in residential areas by integrating LIDAR and remotely sensed imagery

    E-Print Network [OSTI]

    Clemonds, Matthew A

    2006-10-30T23:59:59.000Z

    at higher resolutions is much more difficult to obtain. This has allowed researchers to study urban heat island dynamics at a micro-scale. However, this study suggests that a vegetation index alone might not be the best surrogate variable for providing...

  2. Comparing synthetic aperture radar and LiDAR for above-ground biomass estimation in Glen Affric, Scotland 

    E-Print Network [OSTI]

    Tan, Chue Poh

    2012-06-25T23:59:59.000Z

    Quantifying above-ground biomass (AGB) and carbon sequestration has been a significant focus of attention within the UNFCCC and Kyoto Protocol for improvement of national carbon accounting systems (IPCC, 2007; UNFCCC, ...

  3. GEOPHYSICAL RESEARCH LETTERS, VOL. 25, NO. 16, PAGES 3139-3142, AUGUST 15, 1998 Multiwavelength lidar aerosol measurements made at

    E-Print Network [OSTI]

    Duck, Thomas J.

    ., 1995] leading to polar stratospheric cloud (PSC) formation. Stratospheric aerosols can also serve to as P1) so only a brief overview will be given here. 1Center for Research in Earth and Space Technology) Nagoya University, Nagoya, Japan. 4Communications Research Laboratory (CRL) Tokyo, Japan. 5Meteorological

  4. Computer-based synthetic data to assess the tree delineation algorithm from airborne LiDAR survey

    E-Print Network [OSTI]

    Xi, Weimin

    is driven by the efficient use of forest resources, which in turn requires detailed understanding of forest 2011 Accepted: 2 November 2011 /Published online: 29 November 2011 # Springer Science+Business Media useful forestry relevant information, this data must be interpreted using mathematical models

  5. Computer-based synthetic data to assess the tree delineation algorithm from airborne LiDAR survey

    E-Print Network [OSTI]

    is driven by the efficient use of forest resources, which in turn requires detailed understanding of forest 2011 Accepted: 2 November 2011 # Springer Science+Business Media, LLC 2011 Abstract Small Footprint Li be interpreted using mathematical models and computer algorithms that infer or estimate specific forest metrics

  6. Non-parametric Image Registration of Airborne LiDAR, Hyperspectral and Photographic Imagery of Wooded Landscapes

    E-Print Network [OSTI]

    Lee, Juheon; Cai, Xiaohao; Schönlieb, Carola-Bibiane; Coomes, David A.

    2015-06-02T23:59:59.000Z

    equalization function histeq. Using first returns yielded qualitatively similar results to using all returns. Hyperspectral imaging spectrometers measure solar energy reflected off the Earth’s surface within a swath of land. Hyper- spectral data were gathered... reg , T SURF reg , and TNGF-Curvreg , respectively, in these panels; yellow circle highlights areas of the images where differences among registration methods are seen. The third row zooms in on these highlighted circles. The final row of panels shows...

  7. Absolute localization of mobile robots in forest environments by correlating ground LiDAR to overhead imagery

    E-Print Network [OSTI]

    Hussein, Marwan

    2014-01-01T23:59:59.000Z

    A method for the autonomous geolocation of ground vehicles in forest environments is presented. The method provides an estimate of the global horizontal position of a vehicle strictly based on finding a geometric match ...

  8. HOUGH-TRANSFORM AND EXTENDED RANSAC ALGORITHMS FOR AUTOMATIC DETECTION OF 3D BUILDING ROOF PLANES FROM LIDAR DATA

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    HOUGH-TRANSFORM AND EXTENDED RANSAC ALGORITHMS FOR AUTOMATIC DETECTION OF 3D BUILDING ROOF PLANES reconstruction methods, the techniques allowing the detection of 3D building roof planes are of crucial even if this plane does not always represent a roof plane. So the proposed extension allows harmonizing

  9. Aircraft-protection radar for use with atmospheric lidars Thomas J. Duck, Bernard Firanski, Frank D. Lind, and Dwight Sipler

    E-Print Network [OSTI]

    Duck, Thomas J.

    . Lind, and Dwight Sipler A modified X-band radar system designed to detect aircraft during atmospheric, Dalhousie Univer- sity, Halifax, Nova Scotia, Canada B3H 3J5. F. D. Lind and D. Sipler are with Haystack

  10. Accuracy of small footprint airborne LiDAR in its predictions of tropical moist forest stand structure

    E-Print Network [OSTI]

    Chave, Jérôme

    . Introduction Tropical forests offer a broad range of ecosystem services, from carbon sequestration to potential valuation of biodiversity compo- nents. But, forest conversion in the tropics has dramatically altered and verifiable", and this prompted renewed interest in providing standardized and reproducible methods of forest

  11. 2.5D Dual Contouring: A Robust Approach to Creating Building Models from Aerial LiDAR

    E-Print Network [OSTI]

    Southern California, University of

    thank Tao Ju, Suya You, and anonymous reviewers for their valuable comments. #12;2 Qian-Yi Zhou, Ulrich Neumann Fig. 2. Manually created models [3] show the 2.5D nature of building structures. The aerial Li few points on building walls connecting roof boundaries. In addition, manually created building models

  12. Parameterizing the Difference in Cloud Fraction Defined by Area and by Volume as Observed with Radar and Lidar

    E-Print Network [OSTI]

    Reading, University of

    partially cloudy grid boxes by weighting clear and cloudy fluxes by the fractional area of cloud cover (Ca cloud cover from 53% to 63%, and so is of similar importance to the cloud overlap assumption. A simple for calculating the radiative effect of cloud (Stephens 1984; Edwards and Slingo 1996) and the representation

  13. DOE/SC-ARM/TR-100 Raman Lidar Profiles Best Estimate Value-Added Product Technical Report

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration wouldDECOMPOSITION OF CALCIUMCOSTDOENuclear1382 THEDOE0-354-1502225 The780

  14. Dimitri Batani Dipartimento di Fisica G. Occhialini , Universit di Milano-Bicocca, Milano

    E-Print Network [OSTI]

    Milano-Bicocca, Università

    radiazione secondaria (X, UV) Metrologia LIDAR (misure dell'atmosfera) Telecomunicazioni in fibra ottica

  15. Measuring heights to crown base and crown median with LiDAR in a mature, even-aged loblolly pine stand

    E-Print Network [OSTI]

    Cao, Quang V.

    stand Thomas J. Dean a, *, Quang V. Cao a , Scott D. Roberts b , David L. Evans b a School of Renewable (Ritchie et al., 1993). This system recorded the first reflection from the vegetation or ground. Technical advances allow the energy reflected from the surface to be recorded in 10­ 30-cm height increments

  16. Proceedings of EARSeL-SIG-Workshop LIDAR, Dresden/FRG, June 16 17, 2000 EARSeL eProceedings No. 1 1

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    are accuracy, capability, and cost effectiveness. Over the past twenty five years, developments in lasers the basis for a system which will meet required accuracy standards while maintaining effi- ciency and cost-wing aircraft, to meet a wide range of survey requirements in categories such as charting, dredging, coastal

  17. Using LiDAR, Aerial Photography, and Geospatial Technologies to Reveal and Understand Past Landscapes in Four West Central Missouri Counties

    E-Print Network [OSTI]

    Price, R. Zane

    2012-05-31T23:59:59.000Z

    This dissertation focuses on Hugh Prince's principle of using the present (in this case as seen through remotely sensed imagery) to understand the past via relict features. I studied ghost towns, cemeteries, and abandoned ...

  18. Bachelor thesis: "Validation of an engineering model of the near wake wind field of wind turbines based on nacelle based lidar measurements"

    E-Print Network [OSTI]

    Peinke, Joachim

    , in an early stage of wind farm layout optimisation and wind turbine loading calculation in wind farms by Ainslie[1], This is widely used in the industry for wind farming purposes. Scope During this project analysis are performed of near wake measurements of a 5 MW wind turbine at the offshore test field alpha

  19. Robust 1550-nm single-frequency all-fiber ns-pulsed fiber amplifier for wind-turbine predictive control by wind lidar

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    Oldenburg, Germany ABSTRACT Scaling of the power yield of offshore wind farms relies on the capacity powers [1]. To reach the ambitious and politically motivated aims of Multi-GW offshore wind farms belongs to this category. Clustered in wind farms, today's wind turbines produce Megawatt-level output

  20. A comparison of automated land cover/use classification methods for a Texas bottomland hardwood system using lidar, spot-5, and ancillary data

    E-Print Network [OSTI]

    Vernon, Zachary Isaac

    2009-05-15T23:59:59.000Z

    obtained for this study. 17 Scene 589-283, collected on January 20, 2005, covers approximately 80% of the study area and scene 590-283, collected on February 21, 2005, covers approximately 10% along the eastern side. The remaining 10%, located.... The remaining 10%, along the western 21 edge of the study area, was delineated manually using high resolution aerial photography and NAIP Imagery. Two pixel based classification approaches were investigated, supervised and unsupervised. In order...

  1. Proceedings of EARSeL-SIG-Workshop LIDAR, Dresden/FRG, June 16 17, 2000 EARSeL eProceedings No. 1 68

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    be faulty if these proc- esses are different than assumed during analysis. In December 1999, a non of the condi- tions actually encountered by ship's pilots. It is essential to have high-quality field

  2. Mini-lidar sensor for the remote stand-off sensing of chemical/biological substances and method for sensing same

    DOE Patents [OSTI]

    Ray, Mark D.; Sedlacek, Arthur J.

    2003-08-19T23:59:59.000Z

    A method and apparatus for remote, stand-off, and high efficiency spectroscopic detection of biological and chemical substances. The apparatus including an optical beam transmitter which transmits a beam having an axis of transmission to a target, the beam comprising at least a laser emission. An optical detector having an optical detection path to the target is provided for gathering optical information. The optical detection path has an axis of optical detection. A beam alignment device fixes the transmitter proximal to the detector and directs the beam to the target along the optical detection path such that the axis of transmission is within the optical detection path. Optical information gathered by the optical detector is analyzed by an analyzer which is operatively connected to the detector.

  3. AMS Annual Meeting, Symposium on Recent Developments in Atmospheric Applications of Radar and Lidar. 20-24 January 2008, New Orleans, LA

    E-Print Network [OSTI]

    Xue, Ming

    the evolution of the MCV. The impact of assimilating radial velocity and reflectivity from CASA in addition of four x-band dual-polarization Doppler radars in southwest Oklahoma. During the spring of 2007 2006b. Previous work found that 3DVAR reflectivity assimilation is most effective when combined

  4. Aerosol plume transport and transformation in high spectral resolution lidar measurements and WRF-Flexpart simulations during the MILAGRO Field Campaign

    E-Print Network [OSTI]

    de Foy, B.

    The Mexico City Metropolitan Area (MCMA) experiences high loadings of atmospheric aerosols from anthropogenic sources, biomass burning and wind-blown dust. This paper uses a combination of measurements and numerical ...

  5. Vindicator Lidar Assessment for Wind Turbine Feed-Forward Control Applications: Cooperative Research and Development Final Report, CRADA Number CRD-09-352

    SciTech Connect (OSTI)

    Wright, A.

    2014-01-01T23:59:59.000Z

    Collaborative development and testing of feed-forward and other advanced wind turbine controls using a laser wind sensor.

  6. CityFIT Urban Guide: Modelling and Deploying indicators of Property Exposure to Flooding in Lagos using LIDAR DEM and DSM data 

    E-Print Network [OSTI]

    Mosuro, Sulaiman

    2012-11-29T23:59:59.000Z

    application was prototyped for disseminating time-series flood model information and for reporting details of flood events as they occur to serve for model calibration and enhancement, thereby completing the flood modelling lifecycle....

  7. Proceedings of 2011 NSF Engineering Research and Innovation Conference, Atlanta, Georgia Grant #0856420 LiDAR and optical imaging for 3-D fracture orientations

    E-Print Network [OSTI]

    Maerz, Norbert H.

    conductivity when compared to the rock itself [2]. Discontinuity influences all the engineering properties and behavior of rock [3]. When dealing with discontinuous rock masses, the properties of the discontinuities rock properties such as the strength of the rock and the hydraulic conductivity of the rock which

  8. The Ability of MM5 to Simulate Ice Clouds: Systematic Comparison between Simulated and Measured Fluxes and Lidar/Radar Profiles at the

    E-Print Network [OSTI]

    Protat, Alain

    distribution are critical to the global radiative effect of ice clouds. One of the main uncertainties. To quantify the effect of these clouds onto climate and weather systems, their global coverage, altitude, tem effect. Both macrophysical and microphysical properties of ice clouds regulate this equilibrium

  9. Advances in cold cathode physics and technology

    SciTech Connect (OSTI)

    Nation, J.A. [Cornell Univ., Ithaca, NY (United States)] [Cornell Univ., Ithaca, NY (United States); Schaechter, L. [Technion, Haifa (Israel). Electrical Engineering Dept.] [Technion, Haifa (Israel). Electrical Engineering Dept.; Mako, F.M.; Len, L.K.; Peter, W. [FM Technologies, Inc., Fairfax, VA (United States)] [FM Technologies, Inc., Fairfax, VA (United States); Tang, C.M. [Creatv MicroTech, Inc., Potomac, MD (United States)] [Creatv MicroTech, Inc., Potomac, MD (United States); Srinivasan-Rao, T. [Brookhaven National Lab., Upton, NY (United States)] [Brookhaven National Lab., Upton, NY (United States)

    1999-05-01T23:59:59.000Z

    The authors review recent progress in the physics and technology of cold cathode electron emitters. The characteristics of emission from field emitter arrays, photocathodes, and ferroelectrics are presented, together with a summary of the understanding of the physics involved. The paper concludes with a description of L-band micropulse gun, based on secondary emission in an RF cavity. Emphasis is placed on cathode development for electron guns to drive microwave tubes and RF accelerators.

  10. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulse

  11. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulseMinimalist

  12. Characterization of Interfacial Structure in PEFCs: Water Storage and Contact Resistance Model

    E-Print Network [OSTI]

    Mench, Matthew M.

    Tushar Swamy, E. C. Kumbur,*,a,z and M. M. Mench**,z Fuel Cell Dynamics and Diagnostics Laboratory morphology on the ohmic and mass transport losses at the MPL|CL interface in a polymer electrolyte fuel cell. Polymer electrolyte fuel cells PEFCs have tremendous poten- tial as a power source for various

  13. Mars Program Independent Assessment Team

    E-Print Network [OSTI]

    Leveson, Nancy

    Climate Orbiter (MCO) was launched in late 1998, followed by Mars Polar Lander (MPL) and Deep Space 2 launched in early 1999. MCO failed to achieve Mars orbit because of a navigation error, resulting of the Mars Climate Orbiter Mission," dated November 11, 1999, and the "MCO Mishap Investigation Board Phase I

  14. Guidelines for the Use of Adjuvants in Research Special Emphasis on Freund's Adjuvant

    E-Print Network [OSTI]

    Bandettini, Peter A.

    is emulsified together with a solution of the antigen of interest to form a water-in-oil emulsion, is effective,8 the use of CFA may be scientifically justified for the induction of autoimmune disease models for which such as aluminum compounds (e.g. Alum), squalene-in-water emulsions (MF59 and AS03), monophosphoryl lipid A (MPL

  15. DISCOVERAQ Daily Observational Status Date: 29 June 2011

    E-Print Network [OSTI]

    compromised) Red = Severe or Total Loss of Capability (comment on prognosis for recovery) P3B Status and instruments running UMBC (Hoff) Using MPL from Judd Welton (GSFC) on loan Millersville (Clark) Now and NO for balloon; NO2 returned and ready to test tomorrow Aeronet (Holben) 40+ DRAGON sites; also running

  16. Reason for Testing (Required-failure to include a diagnosis may delay testing. Include all pertinent diagnoses and ICD9 codes. Ie. Primary Lung Cancer 162.9 with metastasis to brain 198.3 and bone 198.5)

    E-Print Network [OSTI]

    Wang, David

    , NF1, NOTCH1, NPM1, NRAS, PDGFRA, PIK3CA, PTCH1, PTEN, PTPN11, RB1, RET, RUNX1, SMO, STK11, TET2, TP53 MAP2K2 MET MPL MTOR MYC MYD88 NF1 NOTCH1 NPM1 NRAS PDGFRA PIK3CA PTCH1 PTEN PTPN11 RB1 RET RUNX1 SMO

  17. How to determine a good multi-programming level for external scheduling Bianca Schroeder Mor Harchol-Balter Adam Wierman

    E-Print Network [OSTI]

    Low, Steven H.

    Heights, NY USA @us.ibm.com Abstract Scheduling/prioritization of DBMS transactions is im not all DBMS resources will be utilized. On the other hand, if the MPL is too high, there is insufficient. For such applications it is often desirable to control the order in which transactions are exe- cuted at the DBMS. An e

  18. How to determine a good multi-programming level for external scheduling Bianca Schroeder Mor Harchol-Balter

    E-Print Network [OSTI]

    Schroeder, Bianca

    Heights, NY USA @us.ibm.com Abstract Scheduling/prioritization of DBMS transactions is im not all DBMS resources will be utilized. On the other hand, if the MPL is too high, there is insufficient. For such applications it is often desirable to control the order in which transactions are exe- cuted at the DBMS. An e

  19. The MAZOOPS Project Third year of engineering school internship report

    E-Print Network [OSTI]

    Jaffe, Jules

    The MAZOOPS Project Third year of engineering school internship report MPL supervisor: Dr. Jules S report ­ Florian Aulanier Page 1 sur 33 1 Acknowledgment This internship has been for me a very good group on the Multiple Angle Zooplankton Sonar and who has supervised this internship in organizing group

  20. Processes in Securing Open Architecture Software Systems

    E-Print Network [OSTI]

    Scacchi, Walt

    |GPL| LGPL Opera EULA GPL Google ToS Google ToS GPL GPL MS Eula Firefox Opera AbiWord Google Docs Google, Google Cal., Google Docs, Windows MPL, Google ToS, MS EULA Instance architecture: Opera, Google Docs, Evolution, OSX Opera EULA., Google ToS, Apple Lic. Instance architecture: Firefox, AbiWord, Evolution

  1. Development of BPM Electronics at the JLAB FEL

    SciTech Connect (OSTI)

    Sexton, D.; Evtushenko, P.; Jordan, K.; Yan, J.; Dutton, S.; Moore, W.; Evans, R.; Coleman, J. [Thomas Jefferson National Accelerator Facility, Free Electron Laser Program, 12000 Jefferson Avenue, Newport News, VA 23606 (United States)

    2006-11-20T23:59:59.000Z

    A new version of BPM electronics based on the AD8362 RMS detector, which is a direct RF to DC converter, is under development at the JLAB FEL. Each of these new BPM electronics utilizes an embedded ColdFire Microprocessor for data processing and communication with the EPICS control system via TCP/IP. The ColdFire runs RTEMS, which is an open source real-time operating system. The JLAB FEL is a SRF Energy Recovery LINAC capable of running up to 10 mA CW beam with a 74.85 MHz micropulse frequency. For diagnostic reasons and for machine tune up, the micropulse frequency can be reduced to 1.17 MHz, which corresponds to about 160 {mu}A of beam current. It is required that the BPM system would be functional for all micropulse frequencies. By taking into account the headroom for the beam steering and current variations the dynamic range of the RF front end is required to be about 60 dB. A BPM resolution of at least 100 {mu}m is required, whereas better resolution is very desirable to make it possible for more accurate measurements of the electron beam optics. Some results of the RF front end development are presented as well as the first measurements made with an electron beam.

  2. Development of BPM Electronics at the JLAB FEL

    SciTech Connect (OSTI)

    Daniel Sexton; Pavel Evtushenko; Kevin Jordan; Jianxun Yan; Steven Dutton; Steven Moore; Richard Evans; James Coleman

    2006-05-01T23:59:59.000Z

    A new version of BPM electronics based on the AD8362 RMS detector, which is a direct RF to DC converter, is under development at the JLAB FEL. Each of these new BPM electronics utilizes an embedded ColdFire Microprocessor for data processing and communication with the EPICS control system via TCP/IP. The ColdFire runs RTEMS, which is an open source real-time operating system. The JLAB FEL is a SRF Energy Recovery LINAC capable of running up to 10 mA CW beam with the micropulse up to 74.85 MHz. For diagnostic reasons and for the machine tune up, the micropulse frequency can be reduced to 1.17 MHz, which corresponds to about 160 ?A of beam current. It is required that the BPM system would be functional for all micropulse frequencies. By taking into account the headroom for the beam steering and current variations the dynamic range of the RF front end is required to be about 60 dB. A BPM resolution of at least 100 ?m is required, whereas better resolution is very desirable to make it possible for more accurate measurements of the electron beam optics. Some results of the RF front end development are presented as well as the first measurements made with an electron beam.

  3. DOI 10.1007/s10546-005-9005-9 Boundary-Layer Meteorology (2006) 119: 135157 Springer 2006

    E-Print Network [OSTI]

    and to the thermal internal boundary-layer formation. The strong coastal and orographic influences sensing systems such as lidars use aerosols as tracers, with the optical power measured by a lidar proportional to the aerosol content of the atmosphere. The lidar signal shows strong backscattering within

  4. Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability

    E-Print Network [OSTI]

    Yamaguchi, Yuya

    2015-01-01T23:59:59.000Z

    To solve the hierarchy problem of the Higgs mass, it may be suggested that there are no an intermediate scale up to the Planck scale except for the TeV scale. For this motivation, we investigate possibilities of gauge coupling unification (GCU) at the Planck scale ($M_{Pl} = 2.4 \\times 10^{18}\\,{\\rm GeV}$) by adding extra particles with the TeV scale mass into the standard model. We find that the GCU at the Planck scale can be realized by extra particles including some relevant scalars, while it cannot be realized only by extra fermions with the same masses. On the other hand, when extra fermions have different masses, the GCU can be realized around $\\sqrt{8 \\pi} M_{Pl}$. By this extension, the vacuum can become stable up to the Planck scale.

  5. Intrinsic Variability and Field Statistics for the Vela Pulsar: 3. Two-Component Fits and Detailed Assessment of Stochastic Growth Theory

    E-Print Network [OSTI]

    Iver H. Cairns; P. Das; P. A. Robinson; S. Johnston

    2003-04-24T23:59:59.000Z

    The variability of the Vela pulsar (PSR B0833-45) corresponds to well-defined field statistics that vary with pulsar phase, ranging from Gaussian intensity statistics off-pulse to approximately power-law statistics in a transition region and then lognormal statistics on-pulse, excluding giant micropulses. These data are analyzed here in terms of two superposed wave populations, using a new calculation for the amplitude statistics of two vectorially-combined transverse fields. Detailed analyses show that the approximately power-law and lognormal distributions observed are fitted well at essentially all on-pulse phases by Gaussian-lognormal and double-lognormal combinations, respectively. These good fits, plus the smooth but significant variations in fit parameters across the source, provide strong evidence that the approximately power-law statistics observed in the transition region are not intrinsic. Instead, the data are consistent with normal pulsar emission having lognormal statistics at all phases. This is consistent with generation in an inhomogeneous source obeying stochastic growth theory (SGT) and with the emission mechanism being purely linear (either direct or indirect). A nonlinear mechanism is viable only if it produces lognormal statistics when suitably ensemble-averaged. Variations in the SGT fit parameters with phase imply that the radiation is relatively more variable near the pulse edges than near the center, as found in earlier work. In contrast, Vela's giant micropulses come from a very restricted phase range and have power-law statistics with indices ($6.7 \\pm 0.6$) not inconsistent with nonlinear wave collapse. These results imply that normal pulses have a different source and generation mechanism than giant micropulses, as suggested previously on other grounds.

  6. An infrared free-electron laser for the Chemical Dynamics Research Laboratory

    SciTech Connect (OSTI)

    Vaughan, D. (comp.)

    1992-04-01T23:59:59.000Z

    This document describes a free-electron laser (FEL) proposed as part of the Chemical Dynamics Research Laboratory (CDRL), a user facility that also incorporates several advanced lasers of conventional design and two beamlines for the ALS. The FEL itself addresses the needs of the chemical sciences community for a high-brightness, tunable source covering a broad region of the infrared spectrum -- from 3 to 50 {mu}m. All of these sources, together with a variety of sophisticated experimental stations, will be housed in a new building to be located adjacent to the ALS. The radiation sources can be synchronized to permit powerful two-color, pump-probe experiments that will further our fundamental understanding of chemical dynamics at the molecular level, especially those aspects relevant to practical issues in combustion chemistry. The technical approach adopted in this design makes use of superconducting radiofrequency (SCRF) accelerating structures. The primary motivation for adopting this approach was to meet the user requirement for wavelength stability equal to one part in 10{sup 4}. Previous studies concluded that a wavelength stability of only one part in 10{sup 3} could be achieved with currently available room-temperature technology. In addition, the superconducting design operates in a continuous-wave (cw) mode and hence offers considerably higher average optical output power. It also allows for various pulse-gating configurations that will permit simultaneous multiuser operations. A summary of the comparative performance attainable with room-temperature and superconducting designs is given. The FEL described in this report provides a continuous train of 30-ps micropulses, with 100{mu}J of optical energy per micropulse, at a repetition rate of 6.1 MHz. The device can also deliver pulses at a cw repetition rate of 12.2 MHz, with a peak power of 50 {mu}J per micropulse. 70 ref.

  7. An infrared free-electron laser for the Chemical Dynamics Research Laboratory. Design report

    SciTech Connect (OSTI)

    Vaughan, D. [comp.

    1992-04-01T23:59:59.000Z

    This document describes a free-electron laser (FEL) proposed as part of the Chemical Dynamics Research Laboratory (CDRL), a user facility that also incorporates several advanced lasers of conventional design and two beamlines for the ALS. The FEL itself addresses the needs of the chemical sciences community for a high-brightness, tunable source covering a broad region of the infrared spectrum -- from 3 to 50 {mu}m. All of these sources, together with a variety of sophisticated experimental stations, will be housed in a new building to be located adjacent to the ALS. The radiation sources can be synchronized to permit powerful two-color, pump-probe experiments that will further our fundamental understanding of chemical dynamics at the molecular level, especially those aspects relevant to practical issues in combustion chemistry. The technical approach adopted in this design makes use of superconducting radiofrequency (SCRF) accelerating structures. The primary motivation for adopting this approach was to meet the user requirement for wavelength stability equal to one part in 10{sup 4}. Previous studies concluded that a wavelength stability of only one part in 10{sup 3} could be achieved with currently available room-temperature technology. In addition, the superconducting design operates in a continuous-wave (cw) mode and hence offers considerably higher average optical output power. It also allows for various pulse-gating configurations that will permit simultaneous multiuser operations. A summary of the comparative performance attainable with room-temperature and superconducting designs is given. The FEL described in this report provides a continuous train of 30-ps micropulses, with 100{mu}J of optical energy per micropulse, at a repetition rate of 6.1 MHz. The device can also deliver pulses at a cw repetition rate of 12.2 MHz, with a peak power of 50 {mu}J per micropulse. 70 ref.

  8. Characterizing and Controlling Beam Losses at the LANSCE Facility

    SciTech Connect (OSTI)

    Rybarcyk, Lawrence J. [Los Alamos National Laboratory

    2012-09-12T23:59:59.000Z

    The Los Alamos Neutron Science Center (LANSCE) currently provides 100-MeV H{sup +} and 800-MeV H{sup -} beams to several user facilities that have distinct beam requirements, e.g. intensity, micropulse pattern, duty factor, etc. Minimizing beam loss is critical to achieving good performance and reliable operation, but can be challenging in the context of simultaneous multi-beam delivery. This presentation will discuss various aspects related to the observation, characterization and minimization of beam loss associated with normal production beam operations in the linac.

  9. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulseMinimalist Approach

  10. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulseMinimalistMixed Bag

  11. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o FreibergeTheField CampaignMicropulseMinimalistMixed

  12. Laser radar VI; Proceedings of the Meeting, Los Angeles, CA, Jan. 23-25, 1991

    SciTech Connect (OSTI)

    Becherer, R.J.

    1991-01-01T23:59:59.000Z

    Topics presented include lidar wind shear detection for commercial aircraft, centroid tracking of range-Doppler images, an analytic approach to centroid performance analysis, simultaneous active/passive IR vehicle detection, and resolution limits for high-resolution imaging lidar. Also presented are laser velocimetry applications, the application of laser radar to autonomous spacecraft landing, 3D laser radar simulation for autonomous spacecraft landing, and ground based CW atmospheric Doppler lidar performamce modeling.

  13. Zhang, K., and H.C. Frey, "Road Grade Estimation for On-Road Vehicle Emissions Modeling Using LIDAR Data," Proceedings, Annual Meeting of the Air & Waste Management Association, June 20-23, 2005, Minneapolis, MN

    E-Print Network [OSTI]

    Frey, H. Christopher

    is defined as the instantaneous power per unit mass of the vehicle and can be calculated based upon speed Data," Proceedings, Annual Meeting of the Air & Waste Management Association, June 20-23, 2005 and Environmental Engineering, Campus Box 7908, Raleigh, NC 27695 ABSTRACT Vehicle Specific Power (VSP) can be used

  14. Ris-R-1325(DA) Spredning af lugt fra svinestalde

    E-Print Network [OSTI]

    . Combined smoke tracer (LIDAR) and gas tracer (SF6) experiments were con- ducted to determine the best at tilsætte SF6 tracergas (udfø

  15. Albany, OR * Anchorage, AK * Morgantown, WV * Pittsburgh, PA...

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

    Absorption LIDAR (DIAL) for Spatial Mapping of Carbon Dioxide for MVA at Geologic Carbon Sequestration Sites Background The overall goal of the Department of Energy's (DOE)...

  16. Proceedings of the U.S. Geological Survey Fifth Biennial Geographic Information

    E-Print Network [OSTI]

    Torgersen, Christian

    Organizations ........................................................................ 2 Review Process, SRTM, Digital Photogrammetry, and LIDAR- Derived Digital Elevation Models: Implications for Geological Digital Geologic Mapping at Yucca Mountain, Nevada ............................................. 13

  17. Away from the Range Front: Intra-Basin Geothermal Exploration...

    Open Energy Info (EERE)

    technologies include: -Highly detailed and precise digital topography from airborne scanning laser data (LiDAR) to reveal recent fault offset patterns -Over-coring stress...

  18. Estimating the Wind Resource in Uttarakhand: Comparison of Dynamic...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Estimating the Wind Resource in Uttarakhand: Comparison of Dynamic Downscaling with Doppler Lidar Wind Measurements Estimating the Wind Resource in Uttarakhand: Comparison of...

  19. Gail Gutowski J.J. Pickle Research Campus, Bldg. 196

    E-Print Network [OSTI]

    Yang, Zong-Liang

    and Evolution (GIMBLE) Project West Antarctica, Dec 2012 ­ Feb 2013 Airborne geophysical survey including radar, LiDAR, gravimetry, and magnetometry. Roles included

  20. aerosol ratio program: Topics by E-print Network

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

    contribute a major portion of atmospheric aerosol mass loading 5. The estimated global annual Liou, K. N. 2 Studying Clouds and Aerosols with Lidar Depolarization Ratio and...

  1. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY Q. J. R. Meteorol. Soc. 133: 11751189 (2007)

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    on the monsoon and harmattan flow structure as well as on aerosol vertical distribution over the Sahel aerosol layer; gravity current; monsoon; harmattan; african monsoon multidisciplinary analysis; lidar

  2. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY Q. J. R. Meteorol. Soc. 135: 139159 (2009)

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    ; harmattan; airborne lidar; dropsondes; ECMWF analyses; SEVIRI imagery; AMMA Received 4 July 2008; Revised 4 northeasterly harmattan flow. This region, generally characterised by strong convergence and low pressures

  3. 2014 GRADUATE STUDIES CONSTRUCTION ENGINEERING

    E-Print Network [OSTI]

    Wang, Yuhang

    , and other optical sensors including thermography cameras, and portable pneumatic and electrical power management & simulation, BIM, virtual design and construction, machine vision, thermography, 3-D LIDAR, real

  4. NETL F 451.1/1-1, Categorical Exclusion Designation Form

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

    Division 2013-2014 10112 - 93014 Darin Damiani Multiple sites, Multiple states Optimization of Reservoir Storage Capacity in Different Depositional Environments LIDAR and...

  5. Atmos. Chem. Phys., 8, 341350, 2008 www.atmos-chem-phys.net/8/341/2008/

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    aerosols. Because aerosols impact both regional and global energy budgets, ow- ing to their highly non of tropospheric aerosol profiles using MAX-DOAS and comparison with lidar and sky radiometer measurements H. Irie1. These retrieved quantities are characterized through comparisons with coin- cident lidar and sky radiometer

  6. ORIGINAL PAPER Synergistic use of very high-frequency radar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    carbon sequestration (Hyde et al. 2007; Lucas et al. 2000; Skole and Tucker 1993). The traditional field · Introduction Accurate estimation of aboveground bio- mass is essential to better understand the carbon cycleSAR . Scanning lidar. Profiling lidar. Aboveground biomass . Best subsets regression . Carbon 1 Introduction

  7. BOSTON UNIVERSITY GRADUATE SCHOOL OF ARTS AND SCIENCES

    E-Print Network [OSTI]

    Myneni, Ranga B.

    in climate change and remote sensing studies. He introduced me to the lidar remote sensing technique, which of other scientists working on vegetation lidar remote sensing. I am honored to have Drs. Davis, Phillips in the exchange of heat, momentum, water, and carbon between the land surface and the atmosphere. The rates

  8. COFIN project Concentration Fluctuations

    E-Print Network [OSTI]

    COFIN project Concentration Fluctuations in Gas Releases by Industrial Accidents Final Summary of random concentration fluctuations in hazardous gas releases and the method was to derive empirical. In each measurement cycle the Lidar emits a short laser light pulse and detects the light Lidar reflected

  9. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.202) Track: Technical

    E-Print Network [OSTI]

    .202) Track: Technical COMMERCIAL LIDAR PROFILERS FOR WIND ENERGY. A COMPARATIVE GUIDE. (abstract-ID: 359) Michael S. Courtney (Risø DTU, Wind Energy Department, Denmark) Lidar profilers have based, portable instrument can eliminate the need for expensive measuring towers whilst providing

  10. RESEARCH LETTER 2002 Blackwell Science Ltd. http://www.blackwell-science.com/geb

    E-Print Network [OSTI]

    Lefsky, Michael

    sensing the quantity and spatial organization of forest biomass. In this study, we compare & Biogeography (2002) 11, 393­399 Blackwell Science, Ltd Lidar remote sensing of above-ground biomass in three to high biomass forests is difficult for conventional optical and radar sensors. Lidar (light detection

  11. DOI 10.1007/s10546-005-7772-y Boundary-Layer Meteorology (2006) 118: 477501 Springer 2006

    E-Print Network [OSTI]

    Ribes, Aurélien

    2006-01-01T23:59:59.000Z

    radial velocity measurements on a 6-km radius area in the lowest 3 km of the troposphere. Thus the urban effects appear to be negligible. Keywords: Atmospheric boundary layer, Doppler lidar, Numerical the Marseille area are compared to the Doppler lidar data, for which the spatial res- olution is comparable

  12. Spatial and temporal variability of the stratospheric aerosol cloud produced by the 1991 Mount Pinatubo eruption

    E-Print Network [OSTI]

    Robock, Alan

    Experiment (SAGE) II aerosol extinction profiles and aerosol backscatter measured by five lidars, both lidar backscatter profiles at 0.532 mm or 0.694 mm wavelengths to the SAGE II extinction wavelengths a tremendous aerosol load into the stratosphere and produced large perturbations to the climate system

  13. POSTGRADUATE MONTEREY, CALIFORNIA

    E-Print Network [OSTI]

    is unlimited UTILITY OF SATELLITE LIDAR WAVEFORM DATA IN SHALLOW WATER by Neal Battaglia June 2010 Thesis. AUTHOR Neal Battaglia 5. FUNDING NUMBERS 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Naval; distribution is unlimited UTILITY OF SATELLITE LIDAR WAVEFORM DATA IN SHALLOW WATER Neal F. Battaglia Civilian

  14. Ris-R-Report Investigation of turbulence measurements

    E-Print Network [OSTI]

    many times that the mean horizontal wind speed measured by a lidar over flat terrain compares very well. We then evaluate this model by comparing the theoretical results to experimental data obtained.......................................................12 3.1 What can a cw conically scanning lidar tell us about turbulence?...12 3.2 Illustration

  15. Fi in Gulf Pidgin Arabic

    E-Print Network [OSTI]

    Potsdam, Eric; Alanazi, Mohammad

    2014-12-01T23:59:59.000Z

    albaqala GA fii(h) pen. M.PL in the.grocery ‘There are pens in the grocery.’ We propose that fi is a copula verb in GPA and has a function similar to be in English, building on proposals in Smart 1990, Næss 2008, and Bakir 2010...: Bahrain, Oman, Qatar, United Arab Emirates, Kuwait, and nearby areas (Lewis, Simons, Fennig 2013). Smart 1990, Næss 2008, and Bakir 2010 further discuss the sociolinguistic situation of GPA. The syntax of GPA has been little studied in the linguistic...

  16. False Vacuum in the Supersymmetric Mass Varying Neutrinos Model

    E-Print Network [OSTI]

    Ryo Takahashi; Morimitsu Tanimoto

    2007-11-04T23:59:59.000Z

    We present detailed analyses of the vacuum structure of the scalar potential in a supersymmetric Mass Varying Neutrinos model. The observed dark energy density is identified with false vacuum energy and the dark energy scale of order $(10^{-3}eV)^4$ is understood by gravitationally suppressed supersymmetry breaking scale, $F({TeV})^2/M_{Pl}$, in the model. The vacuum expectation values of sneutrinos should be tiny in order that the model works. Some decay processes of superparticles into acceleron and sterile neutrino are also discussed in the model.

  17. ARM - Publications: Science Team Meeting Documents

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa-Anomalous Radiative Absorption andResolving ModelsComparisonsPhysical RetrievalMPL-net

  18. S

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection TechnicalResonantNovember 15Rotary FiringRobert D . R yneAOS HPU MPL

  19. Final Report on ASU Research Funded through Lawrence Livermore National Laboratory Grant ASU XAJ9991/CO

    SciTech Connect (OSTI)

    Calhoun, R; Sommer, J

    2004-01-21T23:59:59.000Z

    The line of inquiry which the ASU lidar group has been investigating, with collaboration and support from LLNL, is to create approaches and algorithms for better utilizing the rich information available through modern remote sensors in dispersion modeling systems. In particular, our goal is to create a lidar-data-driven dispersion model mode in ADAPT/LODI. This report describes progress towards this goal during the 2002/2003 academic year. Because of the nature of lidar data and the necessity to utilize additional information, both numerical and measured, this is essentially a data retrieval and data fusion project. With the current generation of commercially available lidar, the scope of the domain in which we are interested is initially 4 to 14 kilometers in radius, where the potentially scanned domain is roughly hemispherical. Figure 1, for example, taken from a recent lidar deployment in Oklahoma City, shows visually the most typical range of the domain that can be probed with the ASU lidar. Ranges 2 or 3 times the distance to the cluster of buildings in the photograph can be probed with a properly functioning, commercially available lidar. This could be of significant value for protecting key buildings with roof-top located remote sensors coupled with dispersion models.

  20. Evaluating Global Aerosol Models and Aerosol and Water Vapor Properties Near Clouds

    SciTech Connect (OSTI)

    Turner, David, D.; Ferrare, Richard, A.

    2011-07-06T23:59:59.000Z

    The 'Evaluating Global Aerosol Models and Aerosol and Water Vapor Properties Near Clouds' project focused extensively on the analysis and utilization of water vapor and aerosol profiles derived from the ARM Raman lidar at the Southern Great Plains ARM site. A wide range of different tasks were performed during this project, all of which improved quality of the data products derived from the lidar or advanced the understanding of atmospheric processes over the site. These activities included: upgrading the Raman lidar to improve its sensitivity; participating in field experiments to validate the lidar aerosol and water vapor retrievals; using the lidar aerosol profiles to evaluate the accuracy of the vertical distribution of aerosols in global aerosol model simulations; examining the correlation between relative humidity and aerosol extinction, and how these change, due to horizontal distance away from cumulus clouds; inferring boundary layer turbulence structure in convective boundary layers from the high-time-resolution lidar water vapor measurements; retrieving cumulus entrainment rates in boundary layer cumulus clouds; and participating in a field experiment that provided data to help validate both the entrainment rate retrievals and the turbulent profiles derived from lidar observations.

  1. Optical techniques for electron-beam characterizations on the APS SASE FEL project

    SciTech Connect (OSTI)

    Lumpkin, A.H.; Yang, B.X.; Berg, W.J.; White, M.; Lewellen, J.W.; Milton, S.V.

    1998-09-01T23:59:59.000Z

    At the Advanced Photon Source (APS) the injector linac`s DC thermionic gun is being supplemented by a low-emittance rf thermionic gun that will support the SASE FEL project. To address the anticipated smaller beam sizes, the standard Chromox beam-profiling screens are being complemented by optical transition radiation (OTR) and Ce-doped YAG single-crystal converters. Direct comparisons of the effective conversion efficiency, spatial resolution, and time response of the three converter screen types have been performed using the DC thermionic gun`s beam accelerated to 400 to 650 MeV. An apparent blurring of observed beam size with increasing incident charge areal density in the YAG crystal was observed for the first time. Only the OTR was prompt enough for the few-ps domain micropulse bunch length measurements performed with a stream camera. Initial beam images of the rf-thermionic gun beam have also been obtained.

  2. SPALLATION NEUTRON SOURCE BEAM CURRENT MONITOR ELECTRONICS.

    SciTech Connect (OSTI)

    KESSELMAN,M.; DAWSON,W.C.

    2002-05-06T23:59:59.000Z

    This paper will discuss the present electronics design for the beam current monitor system to be used throughout the Spallation Neutron Source (SNS) under construction at Oak Ridge National Laboratory. The beam is composed of a micro-pulse structure due to the 402.5MHz RF, and is chopped into mini-pulses of 645ns duration with a 300ns gap, providing a macro-pulse of 1060 mini-pulses repeating at a 60Hz rate. Ring beam current will vary from about 15ma peak during studies, to about 50Amps peak (design to 100 amps). A digital approach to droop compensation has been implemented and initial test results presented.

  3. Feasibility of an XUV FEL Oscillator Driven by a SCRF Linear Accelerator

    SciTech Connect (OSTI)

    Lumpkin, A. H.; Freund, H. P.; Reinsch, M.

    2014-01-01T23:59:59.000Z

    The Advanced Superconducting Test Accelerator (ASTA) facility is currently under construction at Fermi National Accelerator Laboratory. Using a1-ms-long macropulse composed of up to 3000 micropulses, and with beam energies projected from 45 to 800 MeV, the possibility for an extreme ultraviolet (XUV) free-electron laser oscillator (FELO) with the higher energy is evaluated. We have used both GINGER with an oscillator module and the MEDUSA/OPC code to assess FELO saturation prospects at 120 nm, 40 nm, and 13.4 nm. The results support saturation at all of these wavelengths which are also shorter than the demonstrated shortest wavelength record of 176 nm from a storage-ring-based FELO. This indicates linac-driven FELOs can be extended into this XUV wavelength regime previously only reached with single-pass FEL configurations.

  4. Beam dynamics in a long-pulse linear induction accelerator

    SciTech Connect (OSTI)

    Ekdahl, Carl [Los Alamos National Laboratory; Abeyta, Epifanio O [Los Alamos National Laboratory; Aragon, Paul [Los Alamos National Laboratory; Archuleta, Rita [Los Alamos National Laboratory; Cook, Gerald [Los Alamos National Laboratory; Dalmas, Dale [Los Alamos National Laboratory; Esquibel, Kevin [Los Alamos National Laboratory; Gallegos, Robert A [Los Alamos National Laboratory; Garnett, Robert [Los Alamos National Laboratory; Harrison, James F [Los Alamos National Laboratory; Johnson, Jeffrey B [Los Alamos National Laboratory; Jacquez, Edward B [Los Alamos National Laboratory; Mc Cuistian, Brian T [Los Alamos National Laboratory; Montoya, Nicholas A [Los Alamos National Laboratory; Nath, Subrato [Los Alamos National Laboratory; Nielsen, Kurt [Los Alamos National Laboratory; Oro, David [Los Alamos National Laboratory; Prichard, Benjamin [Los Alamos National Laboratory; Rose, Chris R [Los Alamos National Laboratory; Sanchez, Manolito [Los Alamos National Laboratory; Schauer, Martin M [Los Alamos National Laboratory; Seitz, Gerald [Los Alamos National Laboratory; Schulze, Martin [Los Alamos National Laboratory; Bender, Howard A [Los Alamos National Laboratory; Broste, William B [Los Alamos National Laboratory; Carlson, Carl A [Los Alamos National Laboratory; Frayer, Daniel K [Los Alamos National Laboratory; Johnson, Douglas E [Los Alamos National Laboratory; Tom, C Y [Los Alamos National Laboratory; Trainham, C [Los Alamos National Laboratory; Williams, John [Los Alamos National Laboratory; Scarpetti, Raymond [LLNL; Genoni, Thomas [VOSS; Hughes, Thomas [VOSS; Toma, Carsten [VOSS

    2010-01-01T23:59:59.000Z

    The second axis of the Dual Axis Radiography of Hydrodynamic Testing (DARHT) facility produces up to four radiographs within an interval of 1.6 microseconds. It accomplishes this by slicing four micro-pulses out of a long 1.8-kA, 16.5-MeV electron beam pulse and focusing them onto a bremsstrahlung converter target. The long beam pulse is created by a dispenser cathode diode and accelerated by the unique DARHT Axis-II linear induction accelerator (LIA). Beam motion in the accelerator would be a problem for radiography. High frequency motion, such as from beam breakup instability, would blur the individual spots. Low frequency motion, such as produced by pulsed power variation, would produce spot to spot differences. In this article, we describe these sources of beam motion, and the measures we have taken to minimize it.

  5. Primordial non-Gaussianity of gravitational waves in Ho?ava-Lifshitz gravity

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

    Huang, Yongqing; Wang, Anzhong; Yousefi, Razieh; Zhu, Tao

    2013-07-01T23:59:59.000Z

    In this paper, we study the 3-point correlation function of primordial gravitational waves generated in the de Sitter background in the framework of the general covariant Horava-Lifshitz gravity with an arbitrary coupling constant ?. We find that, at cubic order, the interaction Hamiltonian receives contributions from four terms built of the three-dimensional Ricci tensor Rij of the leaves t=constant. In particular, the 3D Ricci scalar R yields the same k dependence as that in general relativity, but with different magnitude due to coupling with the U(1) field A and a UV history. Interestingly, the two terms RijRij and (?iRjk) (?iRjk) exhibit peaks at the squeezed limit. We show that this is due to the effects of the polarization tensors. The signal generated by the fourth term, RijRjkRki, favors the equilateral shape when spins of the three tensor fields are the same, but peaks in between the equilateral and squeezed limits when spins are mixed. The consistency with the recently released Planck observations on non-Gaussianity is also discussed and it is found that (H/M*)²(H/Mpl)?10??, where M* denotes the suppression energy of high-order operators, Mpl the Planck mass, and H the energy of inflation.

  6. METEOROLOGICAL APPLICATIONS Meteorol. Appl. (2013)

    E-Print Network [OSTI]

    Ebert, Beth

    2013-01-01T23:59:59.000Z

    , continuous streamflow, wildfire behaviour, crop yields, and renewable energy prediction, call for new ways. E-mail: e.ebert@bom.gov.au sensing of clouds from space-based and ground-based radar and lidar

  7. Z .ISPRS Journal of Photogrammetry & Remote Sensing 54 1999 123129 Scanning laser mapping of the coastal zone: the SHOALS system

    E-Print Network [OSTI]

    Lefsky, Michael

    structures, and dredged material placement areas as well as adjacent beaches. SHOALS data collected, SHOALS has demonstrated airborne lidar bathymetry's benefits to the coastal community by providing a cost

  8. Journal of Quantitative Spectroscopy & Radiative Transfer 106 (2007) 325347

    E-Print Network [OSTI]

    , aerosol polarimetry sensor; ATSR, along track scanning radiometer; AVHRR, advanced very high resolution radiometer; CALIPSO, cloud-aerosol lidar and infrared pathfinder satellite observations; CLAMS, Chesapeake model; GEWEX, global energy and water cycle experiment; GHG, greenhouse gas; GOME, global ozone

  9. Scattering Properties of Oriented Hexagonal Ice Crystals

    E-Print Network [OSTI]

    Zhang, Feng

    2010-01-14T23:59:59.000Z

    To interpret the data from spaceborn lidar measurements, one must have a basic understanding of the backscattering of oriented ice particles. The conventional raytracing method is not applicable to the scattering of light by oriented particles...

  10. ARM - Field Campaign - Observations and Modeling of the Green...

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

    LIDAR Comparison Related Campaigns Observations and Modeling of the Green Ocean Amazon (GOAMAZON 2014) 2014.01.01, Martin, AMF Comments? We would love to hear from you Send us a...

  11. The single pixel GPS: learning big data signals from tiny coresets

    E-Print Network [OSTI]

    Feldman, Dan

    We present algorithms for simplifying and clustering patterns from sensors such as GPS, LiDAR, and other devices that can produce high-dimensional signals. The algorithms are suitable for handling very large (e.g. terabytes) ...

  12. Quantifying atmospheric pollution across north america from boreal forest fires: a combined analysis of atmospheric modelling and ground-based remote sensing 

    E-Print Network [OSTI]

    Trigwell, Robert

    2011-11-24T23:59:59.000Z

    This paper describes the interpretation of the 2010 summer LIDAR observations from Dal- housie University, Nova Scotia. The GEOS-Chem global 3D chemistry transport model was used to identify the chemical and optical ...

  13. NREL Advances Feedforward Control in Turbines (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01T23:59:59.000Z

    This NREL Highlight is being produced for the 2015 February Alliance S&T Board meeting, and describes research that uses lidar and feedforward algorithms to improve rotor speed regulation and reduce costs of maintenance and operation.

  14. Bioluminescence in a complex coastal environment: 2. Prediction of bioluminescent source depth from spectral

    E-Print Network [OSTI]

    Moline, Mark

    of a passive method (as opposed to active methods such as RADAR or LIDAR) to identify hostile ships, submarines this relative importance [Nealson, 1993]. Therefore the depth distribution of bioluminescent organisms is of eco

  15. Aerial reconstructions via probabilistic data fusion

    E-Print Network [OSTI]

    Cabezas, Randi

    2013-01-01T23:59:59.000Z

    In this thesis we propose a probabilistic model that incorporates multi-modal noisy measurements: aerial images and Light Detection and Ranging (LiDAR) to recover scene geometry and appearance in order to build a 3D ...

  16. Thin Cloud Length Scales Using CALIPSO and CloudSat Data

    E-Print Network [OSTI]

    Solbrig, Jeremy E.

    2010-10-12T23:59:59.000Z

    Thin clouds are the most difficult cloud type to observe. The recent availability of joint cloud products from the active remote sensing instruments aboard CloudSat and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite (CALIPSO) facilitates...

  17. CX-010481: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Differential Absorption Lidar (DIAL) for Spatial Mapping of Carbon Dioxide CX(s) Applied: A1, A9, A11, B3.6 Date: 05/29/2013 Location(s): Montana Offices(s): National Energy Technology Laboratory

  18. altitude[m] glue 24.04.2011

    E-Print Network [OSTI]

    Barbosa, Henrique

    radiometer and a K-band hydrometeor profiler Bourayou R.1, Calheiros A.J.1, Sakuragi J.1, Miacci M.1, Barbosa:CAPES; CHUVA project FAPESP grant 2009/15235-8 Lidar Raymetrics LR101V-D200 Nd:YAG SH 532nm Pulse energy 130 m, the event is only recorded at high altitude. The fall velocity derived from lidar profiles is in fair

  19. Characterizing the Vertical Distribution of Aerosols Over the ARM SGP Site

    SciTech Connect (OSTI)

    Richard Ferrare, Connor Flynn, David Turner

    2009-05-05T23:59:59.000Z

    This project focused on: 1) evaluating the performance of the DOE ARM SGP Raman lidar system in measuring profiles of water vapor and aerosols, and 2) the use of the Raman lidar measurements of aerosol and water vapor profiles for assessing the vertical distribution of aerosols and water vapor simulated by global transport models and examining diurnal variability of aerosols and water vapor. The highest aerosol extinction was generally observed close to the surface during the nighttime just prior to sunrise. The high values of aerosol extinction are most likely associated with increased scattering by hygroscopic aerosols, since the corresponding average relative humidity values were above 70%. After sunrise, relative humidity and aerosol extinction below 500 m decreased with the growth in the daytime convective boundary layer. The largest aerosol extinction for altitudes above 1 km occurred during the early afternoon most likely as a result of the increase in relative humidity. The water vapor mixing ratio profiles generally showed smaller variations with altitude between day and night. We also compared simultaneous measurements of relative humidity, aerosol extinction, and aerosol optical thickness derived from the ARM SGP Raman lidar and in situ instruments on board a small aircraft flown routinely over the ARM SGP site. In contrast, the differences between the CARL and IAP aerosol extinction measurements are considerably larger. Aerosol extinction derived from the IAP measurements is, on average, about 30-40% less than values derived from the Raman lidar. The reasons for this difference are not clear, but may be related to the corrections for supermicron scattering and relative humidity that were applied to the IAP data. The investigators on this project helped to set up a major field mission (2003 Aerosol IOP) over the DOE ARM SGP site. One of the goals of the mission was to further evaluate the aerosol and water vapor retrievals from this lidar system. Analysis of the aerosol and water vapor data collected by the Raman lidar during the 2003 Aerosol IOP indicated that the sensitivity of the lidar was significantly lower than when the lidar was initially deployed. A detailed analysis after the IOP of the long-term dataset demonstrated that the lidar began degrading in early 2002, and that it lost approximately a factor of 4 in sensitivity between 2002 and 2004. We participated in the development of the remediation plan for the system to restore its initial performance. We conducted this refurbishment and upgrade from May- September 2004. This remediation lead to an increase in the signal-to-noise ratio of 10 and 30 for the Raman lidar's water vapor mixing ratio and aerosol backscatter coefficient data, respectively as compared to the signal strengths when the system was first deployed. The DOE ARM Aerosol Lidar Validation Experiment (ALIVE), which was conducted during September 2005, evaluated the impact of these modifications and upgrades on the SGP Raman lidar measurements of aerosol extinction and optical thickness. The CARL modifications significantly improved the accuracy and temporal resolution of the aerosol measurements. Aerosol extinction profiles measured by the Raman lidar were also used to evaluate aerosol extinction profiles and aerosol optical thickness (AOT) simulated by aerosol models as part of the Aerosol module inter-Comparison in global models (AEROCOM) (http://nansen.ipsl.jussieu.fr/AEROCOM/aerocomhome.html) project. There was a wide range in how the models represent the aerosol extinction profiles over the ARM SGP site, even though the average annual AOT represented by the various models and measured by CARL and the Sun photometer were in general agreement, at least within the standard deviations of the averages. There were considerable differences in the average vertical distributions among the models, even among models that had similar average aerosol optical thickness. Deviations between mean aerosol extinction profiles were generally small (~20-30%) for altitudes above 2 km, and grew consider

  20. Strict Limit on CPT Violation from Polarization of Gamma-Ray Bursts

    E-Print Network [OSTI]

    Kenji Toma; Shinji Mukohyama; Daisuke Yonetoku; Toshio Murakami; Shuichi Gunji; Tatehiro Mihara; Yoshiyuki Morihara; Tomonori Sakashita; Takuya Takahashi; Yudai Wakashima; Hajime Yonemochi; Noriyuki Toukairin

    2012-11-09T23:59:59.000Z

    We report the strictest observational verification of CPT invariance in the photon sector, as a result of gamma-ray polarization measurement of distant gamma-ray bursts (GRBs), which are brightest stellar-size explosions in the universe. We detected the gamma-ray polarization of three GRBs with high significance, and the source distances may be constrained by a well-known luminosity indicator for GRBs. For the Lorentz- and CPT-violating dispersion relation E_{\\pm}^2=p^2 \\pm 2\\xi p^3/M_{Pl}, where \\pm denotes different circular polarization states of the photon, the parameter \\xi is constrained as |\\xi|

  1. Constraining Lorentz violations with Gamma Ray Bursts

    E-Print Network [OSTI]

    Maria Rodriguez Martinez; Tsvi Piran

    2006-05-17T23:59:59.000Z

    Gamma ray bursts are excellent candidates to constrain physical models which break Lorentz symmetry. We consider deformed dispersion relations which break the boost invariance and lead to an energy-dependent speed of light. In these models, simultaneously emitted photons from cosmological sources reach Earth with a spectral time delay that depends on the symmetry breaking scale. We estimate the possible bounds which can be obtained by comparing the spectral time delays with the time resolution of available telescopes. We discuss the best strategy to reach the strongest bounds. We compute the probability of detecting bursts that improve the current bounds. The results are encouraging. Depending on the model, it is possible to build a detector that within several years will improve the present limits of 0.015 m_pl.

  2. LHC, le Big Bang en éprouvette

    ScienceCinema (OSTI)

    None

    2011-10-06T23:59:59.000Z

    Notre compréhension de l?Univers est en train de changer? Bar des Sciences - Tout public Débat modéré par Marie-Odile Montchicourt, journaliste de France Info. Evenement en vidéoconférence entre le Globe de la science et de l?innovation, le bar le Baloard de Montpellier et la Maison des Métallos à Paris. Intervenants au CERN : Philippe Charpentier et Daniel Froideveaux, physiciens au CERN. Intervenants à Paris : Vincent Bontemps, philosophe et chercheur au CEA ; Jacques Arnould, philosophe, historien des sciences et théologien, Jean-Jacques Beineix, réalisateur, producteur, scénariste de cinéma. Intervenants à Montpellier (LPTA) : André Neveu, physicien théoricien et directeur de recherche au CNRS ; Gilbert Moultaka, physicien théoricien et chargé de recherche au CNRS. Partenariat : CERN, CEA, IN2P3, Université MPL2 (LPTA) Dans le cadre de la Fête de la science 2008

  3. Meteorological Observations for Renewable Energy Applications at Site 300

    SciTech Connect (OSTI)

    Wharton, S; Alai, M; Myers, K

    2011-10-26T23:59:59.000Z

    In early October 2010, two Laser and Detection Ranging (LIDAR) units (LIDAR-96 and LIDAR-97), a 3 m tall flux tower, and a 3 m tall meteorological tower were installed in the northern section of Site 300 (Figure 1) as a first step in development of a renewable energy testbed facility. This section of the SMS project is aimed at supporting that effort with continuous maintenance of atmospheric monitoring instruments capable of measuring vertical profiles of wind speed and wind direction at heights encountered by future wind power turbines. In addition, fluxes of energy are monitored to estimate atmospheric mixing and its effects on wind flow properties at turbine rotor disk heights. Together, these measurements are critical for providing an accurate wind resource characterization and for validating LLNL atmospheric prediction codes for future renewable energy projects at Site 300. Accurate, high-resolution meteorological measurements of wind flow in the planetary boundary layer (PBL) and surface-atmosphere energy exchange are required for understanding the properties and quality of available wind power at Site 300. Wind speeds at heights found in a typical wind turbine rotor disk ({approx} 40-140 m) are driven by the synergistic impacts of atmospheric stability, orography, and land-surface characteristics on the mean wind flow in the PBL and related turbulence structures. This section of the report details the maintenance and labor required in FY11 to optimize the meteorological instruments and ensure high accuracy of their measurements. A detailed look at the observations from FY11 is also presented. This portion of the project met the following milestones: Milestone 1: successful maintenance and data collection of LIDAR and flux tower instruments; Milestone 2: successful installation of solar power for the LIDAR units; and Milestone 3: successful implementation of remote data transmission for the LIDAR units.

  4. GREEN FUNCTIONS FOR MULTIPLE SCATTERING AS MATHEMATICAL TOOLS FOR DENSE CLOUD REMOTE SENSING: THEORY, WITH PASSIVE AND ACTIVE APPLICATIONS.

    SciTech Connect (OSTI)

    Davis, A. B. (Anthony B.); Marshak, A. (Alexander); Cahalan, R. F. (Robert F.)

    2001-01-01T23:59:59.000Z

    We survey radiative Green function theory (1) in linear transport theory where numerical procedures are required to obtain specific results and (2) in the photon diffusion limit (large optical depths) where it is analytically tractable, at least for homogeneous plane-parallel media. We then describe two recent applications of Green function theory to passive cloud remote sensing in the presence of strong three-dimensional transport effects. Finally, we describe recent instrumental breakthroughs in 'off-beam' cloud lidar which is based on direct measurements of radiative Green functions with special attention to the data collected during the Shuttle-based Lidar In-space Technology Experiment (LITE) mission.

  5. Wide Area Wind Field Monitoring Status & Results

    SciTech Connect (OSTI)

    Alan Marchant; Jed Simmons

    2011-09-30T23:59:59.000Z

    Volume-scanning elastic has been investigated as a means to derive 3D dynamic wind fields for characterization and monitoring of wind energy sites. An eye-safe volume-scanning lidar system was adapted for volume imaging of aerosol concentrations out to a range of 300m. Reformatting of the lidar data as dynamic volume images was successfully demonstrated. A practical method for deriving 3D wind fields from dynamic volume imagery was identified and demonstrated. However, the natural phenomenology was found to provide insufficient aerosol features for reliable wind sensing. The results of this study may be applicable to wind field measurement using injected aerosol tracers.

  6. ARM - Publications: Science Team Meeting Documents

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa-Anomalous Radiative Absorption and Unbounded CascadeHighResultsGlobal LidarRaman Lidar

  7. Initial beam-profiling tests with the NML prototype station at the Fermilab A0 Photoinjector

    SciTech Connect (OSTI)

    Lumpkin, A.; Flora, R.; Johnson, A.S.; Ruan, J.; Santucci, J.; Scarpine, V.; Sun, Y.-E.; Thurman-Keup, R.; Church, M.; Wendt, M.; /Fermilab

    2011-03-01T23:59:59.000Z

    The beam-profile diagnostics station prototype for the superconducting rf electron linac being constructed at Fermilab at the New Muon Lab has been tested. The station uses intercepting radiation converter screens for the low-power beam mode: either a 100-{micro}m thick YAG:Ce single crystal scintillator or a 1-{micro}m thin Al optical transition radiation (OTR) foil. The screens are oriented with the surface perpendicular to the beam direction. A downstream mirror with its surface at 45 degrees to the beam direction is used to direct the radiation into the optical transport. The optical system has better than 20 (10) {micro}m rms spatial resolution when covering a vertical field of view of 18 (5) mm. The initial tests were performed at the A0 Photoinjector at a beam energy of {approx}15 MeV and with micropulse charges from 25 to 500 pC for beam sizes of 45 to 250 microns. Example results will be presented.

  8. Linear induction accelerators at the Los Alamos National Laboratory DARHT facility

    SciTech Connect (OSTI)

    Nath, Subrata [Los Alamos National Laboratory

    2010-09-07T23:59:59.000Z

    The Dual-Axis Radiographic Hydrodynamic Test Facility (DARHT) at Los Alamos National Laboratory consists of two linear induction accelerators at right angles to each other. The First Axis, operating since 1999, produces a nominal 20-MeV, 2-kA single beam-pulse with 60-nsec width. In contrast, the DARHT Second Axis, operating since 2008, produces up to four pulses in a variable pulse format by slicing micro-pulses out of a longer {approx}1.6-microseconds (flat-top) pulse of nominal beam-energy and -current of 17 MeV and 2 kA respectively. Bremsstrahlung x-rays, shining on a hydro-dynamical experimental device, are produced by focusing the electron beam-pulses onto a high-Z target. Variable pulse-formats allow for adjustment of the pulse-to-pulse doses to record a time sequence of x-ray images of the explosively driven imploding mock device. Herein, we present a sampling of the numerous physics and engineering aspects along with the current status of the fully operational dual axes capability. First successful simultaneous use of both the axes for a hydrodynamic experiment was achieved in 2009.

  9. HyperCube Updates Version 11.2 (05/9/14)

    E-Print Network [OSTI]

    and 64 bit) needed to process Lidar full wave form (FWF) sample data files (SDF) in now included. This functionality only applies to the Windows PC version. An SDF example data set, Duncan Knob.zip, has been added and process Riegl (www.riegl.com) full wave form (FWF) sample data files (SDF) has been added (menu File

  10. Quick Start The various sample data files after expansion (use Zip)

    E-Print Network [OSTI]

    library (49 signature files and 1 library list file, all in ASCII, 300 KB). Duncan Knob.sdf Lidar full wave form SDF file (60 MB). Duncan Knob.idx Required index file for Duncan Knob.sdf (4.5 MB). sbet_mission 1.out Smoothed Best Estimate of Trajectory file. Needed for Duncan Knob.sdf (98 MB). Immediate

  11. Building boundary is necessary for the real estate industry, flood management, and homeland security applications.

    E-Print Network [OSTI]

    Shan, Jie

    Abstract Building boundary is necessary for the real estate industry, flood management, and homeland security applications. The extraction of building boundary is also a crucial and difficult step, and Purdue University campus are evaluated. Introduction Airborne lidar (light detection and ranging

  12. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, VOL. 11, NO. 1, JANUARY 2014 5 Retrieval of Forest Stand Age From SAR Image

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -Fernandez Abstract--Data on forest variables (e.g., biomass, trunk height, density) are necessary for environmental contender as an alternative to the usual o based relationships applied to this type of forest. Index Terms--Biomass of backscattering coefficient o/biomass relationships [4]. If available, LIDAR data that supply height estimations

  13. Ecological Applications, 21(4), 2011, pp. 11201137 2011 by the Ecological Society of America

    E-Print Network [OSTI]

    Moorcroft, Paul R.

    closest to the forest inventory. Net primary production values for the Radar and Lidar initializations structure of plant canopies. Key words: biomass; canopy height; ecosystem demography; ecosystem modelingI mission; net primary production, NPP; radar; reducing modeling error. INTRODUCTION Terrestrial ecosystem

  14. ICOWES2013 Conference 17-19 June 2013, Lyngby WINDS OBSERVED IN THE NORTHERN EUROPEAN SEAS WITH

    E-Print Network [OSTI]

    Haak, Hein

    ICOWES2013 Conference 17-19 June 2013, Lyngby 1 WINDS OBSERVED IN THE NORTHERN EUROPEAN SEAS and SSM/I have been compared to offshore meteorological data. For the final satellite-based wind atlas 9 shear observed from the lidars. #12;Another aim was to produce a wind atlas based on satellite data

  15. Atmos. Chem. Phys., 13, 67576776, 2013 www.atmos-chem-phys.net/13/6757/2013/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Access Solid Earth OpenAccess The Cryosphere OpenAccess Retrieving simulated volcanic, desert dust and sea with T-matrix numerical simulations and air mass back tra- jectories. The Lyon UV-VIS polarization lidar, related to the mixing of Eyjafjallaj¨okull volcanic ash with sulfate particles (case of a two

  16. Atmos. Chem. Phys., 13, 58315856, 2013 www.atmos-chem-phys.net/13/5831/2013/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Access Solid Earth OpenAccess The Cryosphere OpenAccess Airborne lidar measurements of surface ozone depletion throughout the flight oc- curred within 300 m of the sea ice surface. A back-trajectory analysis of the air find episodes when the ozone mixing ratio at the sur- face decreases from the normal 30­40 ppbv to near

  17. 2014 Soil Testing Form Corn, Forage, Pasture & Hay Instructions

    E-Print Network [OSTI]

    New Hampshire, University of

    Access Solid Earth OpenAccess The Cryosphere OpenAccess Retrieving simulated volcanic, desert dust and sea with T-matrix numerical simulations and air mass back tra- jectories. The Lyon UV-VIS polarization lidar, related to the mixing of Eyjafjallaj¨okull volcanic ash with sulfate particles (case of a two

  18. Atmos. Chem. Phys., 13, 60236029, 2013 www.atmos-chem-phys.net/13/6023/2013/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Access Solid Earth OpenAccess The Cryosphere OpenAccess Airborne lidar measurements of surface ozone depletion throughout the flight oc- curred within 300 m of the sea ice surface. A back-trajectory analysis of the air find episodes when the ozone mixing ratio at the sur- face decreases from the normal 30­40 ppbv to near

  19. Wind Scanner: A full-scale Laser Facility for Wind and Turbulence Measurements around large Wind Turbines

    E-Print Network [OSTI]

    Wind Scanner: A full-scale Laser Facility for Wind and Turbulence Measurements around large Wind Turbines Torben Mikkelsen, Jakob Mann and Michael Courtney Wind Energy Department, Risø National Laboratory:Torben.Mikkelsen@Risoe.dk Summary RISØ DTU has started to build a newly designed laser-based lidar scanning facility for remote wind

  20. VOLUME 37 MARCH 1998J O U R N A L O F A P P L I E D M E T E O R O L O G Y 1998 American Meteorological Society 241

    E-Print Network [OSTI]

    Liou, K. N.

    - tistics were obtained by Mace (1997) based on the 94- GHz radar returns data. During a number of field ex multilayer cirrus cloud systems using AVHRR data. It is based on the physical properties of the AVHRR 0.63- m ground-based lidar and radar im- ages, balloon-borne replicator data, and NCAR­CLASS humidity soundings

  1. Graduate Programs CIS Graduate Program Overview

    E-Print Network [OSTI]

    Zanibbi, Richard

    Modeling from 3D Lidar and Passive Imagery · Unsupervised Spectral Classification of Astronomical X and Visualization Astrophysical Sciences and Technology Biomedical Imaging Color science Document Restoration Energy Related Nanoimaging and Materials Printing Materials and Processes Remote sensing Sensors and Imaging

  2. Cruise Report R/V F. G. Walton Smith Cruise 0813

    E-Print Network [OSTI]

    Sundermeyer, Miles A.

    Cruise Report R/V F. G. Walton Smith Cruise 0813 7 - 11 September 2008 Development Cruise for Dye Experiments with Airborne LIDAR DRAFT Summary The purpose of the Walton Smith Cruise 0813 was to develop, Engineer Stewart Bell, Mate Jimmy Bovina, Cook William Smith, ABS Dennis Ilias, Marine Technician, RSMAS

  3. MST14/iMST1 First Announcement

    E-Print Network [OSTI]

    -situ studies, and relevant modeling efforts will all be welcome. Contributed and invited talks, signal processing, and quality control 5) Meteor studies and observations 6) MST scattering, micro scatter radars (e.g. radars/forecast models, radars/lidars, radars/in situ (rockets or satellites), radars

  4. MST14/iMST1 Deadline for Abstract submission is February 14, 2014

    E-Print Network [OSTI]

    and other instruments like lidars and in-situ studies, and relevant modeling efforts will all be welcome instruments, signal processing, and quality control. 6. Meteor studies and observations. 7. Middle Atmosphere include MST radars, wind profilers and ionospheric coherent scatter radars (e.g. radars/forecast models

  5. Frequency agile optical parametric oscillator

    DOE Patents [OSTI]

    Velsko, Stephan P. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    The frequency agile OPO device converts a fixed wavelength pump laser beam to arbitrary wavelengths within a specified range with pulse to pulse agility, at a rate limited only by the repetition rate of the pump laser. Uses of this invention include Laser radar, LIDAR, active remote sensing of effluents/pollutants, environmental monitoring, antisensor lasers, and spectroscopy.

  6. Atmos. Chem. Phys., 11, 1193711949, 2011 www.atmos-chem-phys.net/11/11937/2011/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    ground-based cloud radar, high spectral resolution lidar and microwave radiometer are used in conjunction the United States Department of Energy (US DOE) Atmo- spheric Radiation Measurement (ARM) Mixed-Phase Arc, and plant growth (e.g. Prowse et al., 2009). Of clouds observed at high latitudes, mixed-phase stratiform

  7. THE MAGIC FIELD CAMPAIGN IN THE EASTERN NORTH PACIFIC E. R. Lewis

    E-Print Network [OSTI]

    Ohta, Shigemi

    at the 7th International Scientific Conference on the Global Water and Energy Cycle, the Hague, Netherlands (Atmospheric Radiation Measurement) Climate Research Facility of the US Department of Energy, occurred between radars, lidars, a ceilometer, microwave radiometers, a total sky imager, disdrometers, and other

  8. A global forest canopy height map from the Moderate Resolution Imaging Spectroradiometer and the Geoscience

    E-Print Network [OSTI]

    Lefsky, Michael

    - radiometer and the Geoscience Laser Altimeter System, Geophys. Res. Lett., 37, L15401, doi:10.1029/2010GL, is sensitive throughout the range of biomass [Lefsky et al., 2005a, 2005b]. Each lidar waveform is a high spatial resolution record of the energy returned when a shortduration pulse of light is returned from

  9. The Interruption of Alpine Foehn by a Cold Front. Part I: Observations

    E-Print Network [OSTI]

    Gohm, Alexander

    propagation speed wf 1 m/s Inclination of the frontal surface is wf /uf 1/7.5 8° Freitag (1990 in valleys Interaction with local winds (e.g., foehn) foehn cold front Cold front in complex terrain ? ? #12 in Inn and Wipp Valley Temperature slope profile Doppler wind lidar in Wipp Valley #12;6 of 13 Case study

  10. Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina

    E-Print Network [OSTI]

    Mitasova, Helena

    Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina Helena, geospatial analysis, feature extraction, and quantification of change. These techniques were applied requires in-depth understanding of their evolution. Modern geospatial technologies such as lidar, real time

  11. CX-006557: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Differential Absorption Lidar (DIAL) for Spatial Mapping of Carbon DioxideCX(s) Applied: B3.8, B3.11Date: 08/17/2011Location(s): Toole County, MontanaOffice(s): Fossil Energy, National Energy Technology Laboratory

  12. Quantitative Methods for Comparing Different Polyline Stream Network Models

    SciTech Connect (OSTI)

    Danny L. Anderson; Daniel P. Ames; Ping Yang

    2014-04-01T23:59:59.000Z

    Two techniques for exploring relative horizontal accuracy of complex linear spatial features are described and sample source code (pseudo code) is presented for this purpose. The first technique, relative sinuosity, is presented as a measure of the complexity or detail of a polyline network in comparison to a reference network. We term the second technique longitudinal root mean squared error (LRMSE) and present it as a means for quantitatively assessing the horizontal variance between two polyline data sets representing digitized (reference) and derived stream and river networks. Both relative sinuosity and LRMSE are shown to be suitable measures of horizontal stream network accuracy for assessing quality and variation in linear features. Both techniques have been used in two recent investigations involving extracting of hydrographic features from LiDAR elevation data. One confirmed that, with the greatly increased resolution of LiDAR data, smaller cell sizes yielded better stream network delineations, based on sinuosity and LRMSE, when using LiDAR-derived DEMs. The other demonstrated a new method of delineating stream channels directly from LiDAR point clouds, without the intermediate step of deriving a DEM, showing that the direct delineation from LiDAR point clouds yielded an excellent and much better match, as indicated by the LRMSE.

  13. Volume estimates of trees with complex architecture from terrestrial laser scanning

    E-Print Network [OSTI]

    Lefsky, Michael

    consuming and can require destructive sampling. In this study we used a terrestrial lidar sensor; data was analyzed on the basis of branch size and the sampling pattern of the sensor. Two hundred and fifty. 2, 023521 (14 May 2008) © 2008 Society of Photo-Optical Instrumentation Engineers [DOI: 10

  14. Current services offered by the WHSG include: Advice on site suitability or existing data

    E-Print Network [OSTI]

    , project development and survey specifications Full project management, contracting data capture Storage of the technique. When planning to acquire lidar data it is therefore important to understand the objectives of its of any woodland ....present? What is the optimal resolution given aims, scale and budget? The answers

  15. Automated landslide mapping using spectral analysis and high-resolution topographic data: Puget Sound lowlands, Washington, and Portland Hills, Oregon

    E-Print Network [OSTI]

    Perron, Taylor

    Automated landslide mapping using spectral analysis and high-resolution topographic data: Puget Landslide map LiDAR Tualatin Puget Wavelet Landslide inventory maps are necessary for assessing landslide of spectral analysis that utilize LiDAR-derived digital elevation models of the Puget Sound lowlands

  16. Comparison between active sensor and radiosonde cloud boundaries over the ARM Southern Great Plains site

    E-Print Network [OSTI]

    to test the strengths and limitations of cloud boundary retrievals from radiosonde profiles, 4 yearsComparison between active sensor and radiosonde cloud boundaries over the ARM Southern Great Plains radiosonde-based methods applied to 200 m resolution profiles obtained at the same site. The lidar

  17. FILTERING OF ARTIFACTS AND PAVEMENT SEGMENTATION FROM MOBILE Jorge Hernandez and Beatriz Marcotegui

    E-Print Network [OSTI]

    Cord, Aurélien

    FILTERING OF ARTIFACTS AND PAVEMENT SEGMENTATION FROM MOBILE LIDAR DATA Jorge Hern the contour between pavements and roads. The method uses a quasi-flat zone algorithm and a region adjacency boundary. Finally, edges with a value compatible with the pavement/road difference (about 14[cm

  18. THE PENNSYLVANIA STATE UNIVERSITY SCHREYER HONORS COLLEGE

    E-Print Network [OSTI]

    Brennan, Sean

    . #12;i ABSTRACT With advances in range finding technology and computing power, vehicle automation ENGINEERING SIMULATION OF A VEHICLE DOCKING AND COLLISION AVOIDANCE SYSTEM USING LIDAR-BASED OBJECT TRACKING is becoming increasingly commonplace. One of the requirements for these vehicles is to meet or exceed

  19. LASER MEASUREMENTS OF WAKE DYNAMICS Ferhat Bingol, Jakob Mann and Gunner C. Larsen

    E-Print Network [OSTI]

    in the past [3] [7], due to its implications for energy production, studies of the dy- namics of the wake, which may be of crucial importance for turbine loadings, are more rare. Here we present a new from upstream turbines. The wind energy LiDAR, ZephIR (Figure 1a), was de- veloped primarily to obtain

  20. Annual Report of the EURATOM/CCFE Fusion Programme 2013 8 ITER SYSTEMS

    E-Print Network [OSTI]

    and undertake leading or major roles in the design and R&D of ITER specialist systems (Plasma Heating, Diagnostics and Remote Handling etc.). Seek to play other design roles in R&D of ITER specialist systems Resonance Heating (ICRH) system. Neutral Beam Injection heating system. Core LIDAR Thompson scattering

  1. Annual Report of the EURATOM/CCFE Fusion Programme 2012/13 8 ITER SYSTEMS

    E-Print Network [OSTI]

    Heating, Diagnostics and Remote Handling etc). · Seek to play other design roles in R&D of ITER specialist in the following key ITER systems: · Ion Cyclotron Resonance Heating (ICRH) system. · Neutral Beam Injection heating system. · Core LIDAR Thompson scattering to measure the electron temperature and density profiles

  2. Eurographics/ IEEE-VGTC Symposium on Visualization 2008 A. Vilanova, A. Telea, G. Scheuermann, and T. Mller

    E-Print Network [OSTI]

    Wartell, Zachary

    LIDAR remote sensing data and not just [the resulting] bare earth [Digital Elevation Maps (DEM)]," "research on using the entire point cloud of this remote sensing data for scien- tific applications has been including a main 3D view, a heat map view and a zoomed-in inspection view. For the main 3D view a three

  3. Oktober 26. 2009 Prediction of Load and Power Fluctuations from Wind Turbine

    E-Print Network [OSTI]

    for the fluctuating loads on the blade tip: The lift force on a section of a wind turbine's blade is given by the lift from a spinner-based wind lidar : The combined fluctuating lift force term, however, 0 0 2u U v , canOktober 26. 2009 Vers 003 Prediction of Load and Power Fluctuations from Wind Turbine Spinner

  4. Estimating Canopy Fuel Parameters with In-Situ and Remote Sensing Data

    E-Print Network [OSTI]

    Mutlu, Muge

    2012-02-14T23:59:59.000Z

    is to estimate the forest canopy fuel parameters including crown base height (CBH) and crown bulk density (CBD), and to investigate the potential of using airborne lidar data in east Texas. The specific objectives are to: (1) propose allometric estimators of CBD...

  5. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.206) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.206) Track: Technical INVESTIGATION OF THE MEASUREMENT OF THE WIND SPEED STANDARD DEVIATION USING) Siemens wind power The LiDAR seems to be an effective alternative to met masts measurements of wind

  6. An evaluation of alternate remote sensing products for forest inventory, monitoring, and

    E-Print Network [OSTI]

    Lefsky, Michael

    and related attributes at a regional scale. Several sensors were evaluated, including (i) single date Landsat), a lidar sensor that di- rectly measures the height and canopy structure of forest vegetation. To evaluateAn evaluation of alternate remote sensing products for forest inventory, monitoring, and mapping

  7. Oceans and Coastal Resources Council Final Research List in priority order

    E-Print Network [OSTI]

    new technologies--including but not limted to sensors (LIDAR, sonar, passive acoustics, infrared observing systems in areas that currently have no or minimal observing. 2 13.45 RC 74: Identify and evaluate by 2010. 12 22 RC 101: Conduct monitoring, assessment, and modeling evaluations of the impacts of fishing

  8. 2007 Urban Remote Sensing Joint Event 1-4244-0712-5/07/$20.00 2007 IEEE.

    E-Print Network [OSTI]

    Kerekes, John

    into the software, providing an extremely powerful tool for algorithm testing and sensor evaluation. However wave infrared (0.4 to 20 microns). Over the last few years, significant enhancements such as spectral-dimensional spatial details, while lidar can provide accurate 3D position information. Similarly, infrared data

  9. The GCM Oriented Calipso Cloud Product (CALIPSO-GOCCP) H. Chepfer(1)

    E-Print Network [OSTI]

    Dufresne, Jean-Louis

    ;2 Abstract. This paper presents the GCM-Oriented Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Cloud Product (CALIPSO-GOCCP) designed to evaluate the cloudiness simulated by General the effects of viewing geometry, sensors' sensitivity and vertical overlap of cloud layers. For this purpose

  10. National Airborne Field Experiments for Prediction in Ungauged Basins

    E-Print Network [OSTI]

    Walker, Jeff

    , such as validation of these data products from new sensors, maturing retrieval algorithms, developing techniques with thermal infrared, near infrared, visible and lidar data. Passive microwave data will be collected in both if there is sufficient interest. A trial campaign to evalu

  11. Sesso Temtica: Contribuio do Sensoriamento Remoto para a Explorao Petrolfera em Bacias Terrestres (Contribution of remote sensing for oil exploration in terrestrial basins).

    E-Print Network [OSTI]

    and gas exploration in onshore areas, such as seismic survey planning, definition of boundary conditions of morphostructural interpretation techniques aiming at the detection of subsurface traps: transition from RADAMBRASIL, SRTM, and LIDAR Dr. Fernando Pellon de Miranda (Petrobras/CENPES) 10:00 Joint interpretation

  12. Remote Sensing Ayman F. Habib Data Acquisition Systems

    E-Print Network [OSTI]

    Habib, Ayman

    Remote Sensing Ayman F. Habib 1 Chapter 3 Data Acquisition Systems #12;Remote Sensing Ayman F. ­ Electro-mechanical scanners. #12;Remote Sensing Ayman F. Habib 3 Overview · LIDAR operational principles for recognition and classification purposes. #12;Remote Sensing Ayman F. Habib 4 Remote Sensing Systems Utilized

  13. Frequency agile optical parametric oscillator

    DOE Patents [OSTI]

    Velsko, S.P.

    1998-11-24T23:59:59.000Z

    The frequency agile OPO device converts a fixed wavelength pump laser beam to arbitrary wavelengths within a specified range with pulse to pulse agility, at a rate limited only by the repetition rate of the pump laser. Uses of this invention include Laser radar, LIDAR, active remote sensing of effluents/pollutants, environmental monitoring, antisensor lasers, and spectroscopy. 14 figs.

  14. Biogeosciences, 9, 179191, 2012 www.biogeosciences.net/9/179/2012/

    E-Print Network [OSTI]

    Lefsky, Michael

    -179-2012 © Author(s) 2012. CC Attribution 3.0 License. Biogeosciences Mapping tropical forest biomass with radar and spaceborne LiDAR in Lop´e National Park, Gabon: overcoming problems of high biomass and persistent cloud E. T, University of Stirling, Stirling, FK9 4LA, UK 5Institut de Recherche en Ecologie Tropicale, CENAREST

  15. Response of Wetland Soils to Flow Alterations in the Sabine River below Toledo Bend Dam for the Texas Instream Flows Program.

    E-Print Network [OSTI]

    Nally, Deseri 1975-

    2011-04-29T23:59:59.000Z

    sites were identified below the dam using high radar LIDAR digital elevation modeling. Soils were collected from each stratum to a depth of 50 cm using a stratified random approach. Distinct patterns were observed in regards to the pH, redox, Ferrous...

  16. A Nested Micro-Scale Simulation of a Lake Michigan Land-Breeze Front Gijs de Boer,Gregory J.Tripoli,Edwin W.Eloranta

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    Experiments (LAKE-ICE) on 21 December 1997,the University of Wisconsin Volume Imaging Lidar (UW-VIL) observedA Nested Micro-Scale Simulation of a Lake Michigan Land-Breeze Front Gijs de Boer,Gregory J.Tripoli,Edwin W.Eloranta Department of Atmospheric and Oceanic Sciences,The University of Wisconsin - Madison

  17. Introduction As part of the LAKE-ICE experiment the University of Wisconsin Volume

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    Introduction As part of the LAKE-ICE experiment the University of Wisconsin Volume Imaging Lidar (VIL) observed a land-breeze circulation along the western shore of Lake Michigan. During the classic structure of a density current along with gravity waves forced by the front. The University

  18. A GIS-Assisted Rail Construction Econometric Model that Incorporates LlDAR Data

    E-Print Network [OSTI]

    Hodgson, Michael E.

    A GIS-Assisted Rail Construction Econometric Model that Incorporates LlDAR Data David J. Cowen employed a raster GIS econometric routing model for the exploration of potential routes using construction in the grid-based econometric model was obtained from Light Detection and Ranging (LIDAR)data with accurate 0

  19. Session: Advances in measuring methods (CT2.1) Track: Technical

    E-Print Network [OSTI]

    DTU (2) Siemens wind power (3) Vestas wind system The measurement of a power curve on large wind, LIDAR measurements of wind profiles have shown potential for power curve measurement and this device to the met mast data and will be compared to the power curve, which is measured in terms of the cup

  20. Observations from 1 km beneath to 25 km above the sea surface reveal the complex interactions in Indian Ocean westerly wind bursts associated with the MaddenJulian oscillation.

    E-Print Network [OSTI]

    Johnson, Richard H.

    velocity profile measurements using W-band Doppler radar and high-resolution Doppler lidar; · continuousC-bandDopplerradarscansmeasuring radial velocity and radar reflectivity; · particle size distributions and chemical composi- tion of aeros by a sustained period of warming moderated by the cooling effect of ocean turbulence. Our pur- pose here

  1. Remote Sensing of Mountain Environments Andreas Kb, Department of Geography, University of Zurich, Switzerland

    E-Print Network [OSTI]

    Kääb, Andreas

    ;2 · Visible light and near infrared (VNIR): sensors collect the reflected sunlight (passive sensor); data and near infrared light, short-wave infrared, thermal infrared, and microwaves) (Figure 1). Together, LIDAR; active sensor) apply often near infrared. · Short-wave infrared (SWIR): some surfaces show

  2. Supplement of Atmos. Chem. Phys., 14, 1001310060, 2014 http://www.atmos-chem-phys.net/14/10013/2014/

    E-Print Network [OSTI]

    Pierce, Jeffrey

    . Statistical metrics in the tables include the bias, root-mean-square error (RMSE), correlation coefficient (R sampled by radar wind profilers and lidars. Statistical and graphical programs are also available that processes the same field dataset creates different software scripts or programs. As part of the AMT

  3. Morphological barrier island changes and recovery of dunes after Hurricane Dennis, St. George Island, Florida

    E-Print Network [OSTI]

    Fagherazzi, Sergio

    of the barrier island are analyzed, along with the short-term post-storm recovery of secondary dunes. ResultsMorphological barrier island changes and recovery of dunes after Hurricane Dennis, St. George September 2009 Keywords: Dune recovery LiDAR Overwash Hurricane Dennis Barrier island During the summer

  4. scripps institution of oceanography, university of california, san diego Cecil H. & Ida M. Green Institute of Geophysics & Planetary Physics

    E-Print Network [OSTI]

    Constable, Steve

    landscape systems, Werner lidar, Kent lunar magnetism and seismology, Johnson marine electromagnetic and geology; deep and shallow struc- tures in seismology; and the history of the geo- magnetic field. We; for monitoring the spatial- ly averaged temperature in the oceans from their acoustic characteristics

  5. Impact of Dynamics and Atmospheric State on Cloud Vertical Overlap CATHERINE M. NAUD

    E-Print Network [OSTI]

    ;(United Kingdom) during three winter months, Hogan and Illingworth (2000) found that cloudy sublayers be influenced by large-scale vertical motion, wind shear, or convection. Observations from the U.S. Department of Energy Atmospheric Radiation Measurement program ground- based radars and lidars in midlatitude

  6. Map-aided Fusion Using Evidential Grids for Mobile Perception in Urban Environment

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Map-aided Fusion Using Evidential Grids for Mobile Perception in Urban Environment Marek Kurdej knowl- edge. A geographic map is considered an additional source of information fused with a grid are detailed in sec- tion 2.4. Figure 1 presents a general overview of our approach. LIDAR Applanix maps ScanGrid

  7. Generated using version 3.2 of the official AMS LATEX template RETRIEVAL OF THE TURBULENT AND1

    E-Print Network [OSTI]

    Baehr, Christophe

    that allows the derivation of Tur-7 bulent Kinetic Energy (TKE) and Eddy Dissipation Rate (EDR) from Doppler) or the Eddy Dissipation Rate (EDR) in the boundary layer. The best approach17 consists in using aircraft wind, TKE or EDR in28 the Boundary Layer with a Doppler lidar.29 The ability of this method to learn

  8. The Bolund Experiment Design of Measurement Campaign using CFD

    E-Print Network [OSTI]

    determination of mean wind, wind gradients and turbulence intensity on potential wind turbine positions complex terrain for reliable estimation of power production and wind turbine loads. · Development of remote sensing techniques (Lidar) for measuring wind conditions in complex terrain, including

  9. Meeting: Slowing the Flow Programme Board Subject: Pickering Update Date: 27 March 2012 Paper No

    E-Print Network [OSTI]

    by the Environment Agency to provide expert advice on design, reservoir implications and the environmental impact as possible. The model has since been revised using data from LIDAR technology, which has demonstrated eased some of the tight constraints on the original reservoir scheme. As a consequence, we have also

  10. Session: Site assessment (CS4.4) Track: Scientific

    E-Print Network [OSTI]

    WITH LIDAR (abstract-ID: 340) Ole Rathmann (Risø DTU, Wind Energy, Denmark) Jakob Mann, Denmark (1) Ebba Dellwik, Denmark (1) Ferhat Bingöl, Denmark (1) (1) Risø DTU It is estimated that 30% of the European wind energy growth takes place in areas where the wind flow is affected by forests. The description

  11. Ris-R-Report 12MW: final report

    E-Print Network [OSTI]

    at the Horns Rev offshore wind farm deploying a lidar and a sodar on the transformer platform. The observed the scientific basis relevant for the next generation of huge 12 MW wind turbines operating offshore. The project data were successfully compared to offshore mast data and the wind profile was extended 100 m above

  12. 15 MARCH 2004 715S T E P H E N S E T A L . 2004 American Meteorological Society

    E-Print Network [OSTI]

    Stephens, Graeme L.

    of the Parameterization of Subgrid-Scale Cloud Effects on Radiative Transfer. Part I: Vertical Overlap GRAEME L. STEPHENS approaches for parameterizing the effects of vertical variability of cloudiness on radiative transfer a consequence of the nature of the cloud cover statistics associated with the lidar/radar observations used

  13. Q U A R T E R L Y J O U R N A L R O Y A L M E T E O R O L O G I C A L S O C I E T Y

    E-Print Network [OSTI]

    Hogan, Robin

    -phase clouds on a global scale. KEYWORDS: Depolarization ratio Radar­lidar synergy Radiative effect Supercooled the radiative effect of the supercooled water. It was found that, despite their low liquid-water path (generally less than 10­20 g m¡2 ), these clouds caused a signi cant increase in the re ection of solar radiation

  14. 6, 1064910672, 2006 Extinction in tropical

    E-Print Network [OSTI]

    (Stephens et al., 1990). The radiative influence of a given cirrus cloud depends mostly on the delicate balance between its albedo effect and its greenhouse effect. The dominant effect is globally unknownACPD 6, 10649­10672, 2006 Extinction in tropical ice clouds from lidar, Nephelometer V. Noel et al

  15. 3-D MAPPING TECHNOLOGIES FOR HIGH LEVEL WASTE TANKS

    SciTech Connect (OSTI)

    Marzolf, A.; Folsom, M.

    2010-08-31T23:59:59.000Z

    This research investigated four techniques that could be applicable for mapping of solids remaining in radioactive waste tanks at the Savannah River Site: stereo vision, LIDAR, flash LIDAR, and Structure from Motion (SfM). Stereo vision is the least appropriate technique for the solids mapping application. Although the equipment cost is low and repackaging would be fairly simple, the algorithms to create a 3D image from stereo vision would require significant further development and may not even be applicable since stereo vision works by finding disparity in feature point locations from the images taken by the cameras. When minimal variation in visual texture exists for an area of interest, it becomes difficult for the software to detect correspondences for that object. SfM appears to be appropriate for solids mapping in waste tanks. However, equipment development would be required for positioning and movement of the camera in the tank space to enable capturing a sequence of images of the scene. Since SfM requires the identification of distinctive features and associates those features to their corresponding instantiations in the other image frames, mockup testing would be required to determine the applicability of SfM technology for mapping of waste in tanks. There may be too few features to track between image frame sequences to employ the SfM technology since uniform appearance may exist when viewing the remaining solids in the interior of the waste tanks. Although scanning LIDAR appears to be an adequate solution, the expense of the equipment ($80,000-$120,000) and the need for further development to allow tank deployment may prohibit utilizing this technology. The development would include repackaging of equipment to permit deployment through the 4-inch access ports and to keep the equipment relatively uncontaminated to allow use in additional tanks. 3D flash LIDAR has a number of advantages over stereo vision, scanning LIDAR, and SfM, including full frame time-of-flight data (3D image) collected with a single laser pulse, high frame rates, direct calculation of range, blur-free images without motion distortion, no need for precision scanning mechanisms, ability to combine 3D flash LIDAR with 2D cameras for 2D texture over 3D depth, and no moving parts. The major disadvantage of the 3D flash LIDAR camera is the cost of approximately $150,000, not including the software development time and repackaging of the camera for deployment in the waste tanks.

  16. Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

    SciTech Connect (OSTI)

    Kandlikar, S.G.; Lu, Z.; Rao, N.; Sergi, J.; Rath, C.; Dade, C.; Trabold, T.; Owejan, J.; Gagliardo, J.; Allen, J.; Yassar, R.S.; Medici, E.; Herescu, A.

    2010-05-30T23:59:59.000Z

    In this program, Rochester Institute of Technology (RIT), General Motors (GM) and Michigan Technological University (MTU) have focused on fundamental studies that address water transport, accumulation and mitigation processes in the gas diffusion layer and flow field channels of the bipolar plate. These studies have been conducted with a particular emphasis on understanding the key transport phenomena which control fuel cell operation under freezing conditions. Technical accomplishments are listed below: • Demonstrated that shutdown air purge is controlled predominantly by the water carrying capacity of the purge stream and the most practical means of reducing the purge time and energy is to reduce the volume of liquid water present in the fuel cell at shutdown. The GDL thermal conductivity has been identified as an important parameter to dictate water accumulation within a GDL. • Found that under the normal shutdown conditions most of the GDL-level water accumulation occurs on the anode side and that the mass transport resistance of the membrane electrode assembly (MEA) thus plays a critically important role in understanding and optimizing purge. • Identified two-phase flow patterns (slug, film and mist flow) in flow field channel, established the features of each pattern, and created a flow pattern map to characterize the two-phase flow in GDL/channel combination. • Implemented changes to the baseline channel surface energy and GDL materials and evaluated their performance with the ex situ multi-channel experiments. It was found that the hydrophilic channel (contact angle ? ? 10?) facilitates the removal of liquid water by capillary effects and by reducing water accumulation at the channel exit. It was also found that GDL without MPL promotes film flow and shifts the slug-to-film flow transition to lower air flow rates, compared with the case of GDL with MPL. • Identified a new mechanism of water transport through GDLs based on Haines jump mechanism. The breakdown and redevelopment of the water paths in GDLs lead to an intermittent water drainage behavior, which is characterized by dynamic capillary pressure and changing of breakthrough location. MPL was found to not only limit the number of water entry locations into the GDL (thus drastically reducing water saturation), but also stabilizes the water paths (or morphology). • Simultaneously visualized the water transport on cathode and anode channels of an operating fuel cell. It was found that under relatively dry hydrogen/air conditions at lower temperatures, the cathode channels display a similar flow pattern map to the ex-situ experiments under similar conditions. Liquid water on the anode side is more likely formed via condensation of water vapor which is transported through the anode GDL. • Investigated the water percolation through the GDL with pseudo-Hele-Shaw experiments and simulated the capillary-driven two-phase flow inside gas diffusion media, with the pore size distributions being modeled by using Weibull distribution functions. The effect of the inclusion of the microporous layer in the fuel cell assembly was explored numerically. • Developed and validated a simple, reliable computational tool for predicting liquid water transport in GDLs. • Developed a new method of determining the pore size distribution in GDL using scanning electron microscope (SEM) image processing, which allows for separate characterization of GDL wetting properties and pore size distribution. • Determined the effect of surface wettability and channel cross section and bend dihedral on liquid holdup in fuel cell flow channels. A major thrust of this research program has been the development of an optimal combination of materials, design features and cell operating conditions that achieve a water management strategy which facilitates fuel cell operation under freezing conditions. Based on our various findings, we have made the final recommendation relative to GDL materials, bipolar design and surface properties, and the combination of materials, design featur

  17. The Aerosol Lidar Validation Experiment … ALIVE 1Schmid, B., 2Ferrare, R., 3Turner,D., 4Flynn, C., 5Cairns, B., 6Dominguez, R., 6Gore, W., 7Groff, D., 8Herman, B., 9Hovelman, B., 10Jefferson, A., 6Johnson, R., 5Knobelspiesse, K., 4Mendoza, A., 10Ogren, J., 4Petty, D., ?Russell, E., 6Russell, P., 4Roeder, L., 6Truong, N. 1BAER Institute, 2NASA Langley Res. Center, 3Univ. Of Wisconsin-Madison, 4Pacific Northwest Natl. Lab., 5Columbia Univ., 6NASA Ames Res. Center, 7ARM SGP, 8City Univ. of New York, 9Sky Research, Inc., 10NOAA CMDL

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposedPAGESafetyTed DonatARM Program Data Quality

  18. Self-bunching electron guns

    SciTech Connect (OSTI)

    Mako, F.; Len, L. K.; Peter, W. [FM Technologies. Inc., 10529-B Braddock Road, Fairfax, Virginia 22032 (United States)

    1999-07-12T23:59:59.000Z

    We report on three electron gun projects that are aimed at power tube and injector applications. The purpose of the work is to develop robust electron guns which produce self-bunched, high-current-density beams. We have demonstrated cold emission, long life, and tolerance to contamination. The cold emission process is based on secondary electron emission. FMT has studied this resonant bunching process which gives rise to high current densities (0.01-5 kA/cm{sup 2}), high charge bunches (up to 100 nC/bunch), and short pulses (1-100 ps) for frequencies from 1 to 12 GHz. The beam pulse width is nominally {approx}5% of the rf period. The first project is the L-Band Micro-Pulse Gun (MPG). Measurements show {approx}40 ps long micro-bunches at {approx}20 A/cm{sup 2} without contamination due to air exposure. Lifetime testing has been carried out for about 18 months operating at 1.25 GHz for almost 24 hours per day at a repetition rate of 300 Hz and 5 {mu}s-long macro-pulses. About 5.8x10{sup 13} micro-bunches or {approx}62,000 coulombs have passed through this gun and it is still working fine. The second project, the S-Band MPG{sup {dagger}}, is now operational. It is functioning at a frequency of 2.85 GHz, a repetition rate of 30 Hz, with a 2 {mu}s-long macro-pulse. It produces about 150 A/cm{sup 2}. The third project involves the construction of a 34.2 GHz frequency-multiplied source driven by an X-Band MPG. Analytical work has been carried out on this device, and we are ready to proceed with design, fabrication, and testing.

  19. Amyloid Structure and Assembly: Insights from Scanning Transmission Electron Microscopy

    SciTech Connect (OSTI)

    Goldsbury, C.; Wall, J.; Baxa, U.; Simon, M. N.; Steven, A. C.; Engel, A.; Aebi, U.; Muller, S. A.

    2011-01-01T23:59:59.000Z

    Amyloid fibrils are filamentous protein aggregates implicated in several common diseases such as Alzheimer's disease and type II diabetes. Similar structures are also the molecular principle of the infectious spongiform encephalopathies such as Creutzfeldt-Jakob disease in humans, scrapie in sheep, and of the so-called yeast prions, inherited non-chromosomal elements found in yeast and fungi. Scanning transmission electron microscopy (STEM) is often used to delineate the assembly mechanism and structural properties of amyloid aggregates. In this review we consider specifically contributions and limitations of STEM for the investigation of amyloid assembly pathways, fibril polymorphisms and structural models of amyloid fibrils. This type of microscopy provides the only method to directly measure the mass-per-length (MPL) of individual filaments. Made on both in vitro assembled and ex vivo samples, STEM mass measurements have illuminated the hierarchical relationships between amyloid fibrils and revealed that polymorphic fibrils and various globular oligomers can assemble simultaneously from a single polypeptide. The MPLs also impose strong constraints on possible packing schemes, assisting in molecular model building when combined with high-resolution methods like solid-state nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR).

  20. Technical Assistance to Developers

    SciTech Connect (OSTI)

    Rockward, Tommy [Los Alamos National Laboratory; Borup, Rodney L. [Los Alamos National Laboratory; Garzon, Fernando H. [Los Alamos National Laboratory; Mukundan, Rangachary [Los Alamos National Laboratory; Spernjak, Dusan [Los Alamos National Laboratory

    2012-07-17T23:59:59.000Z

    This task supports the allowance of technical assistance to fuel-cell component and system developers as directed by the DOE. This task includes testing of novel materials and participation in the further development and validation of single cell test protocols. This task also covers technical assistance to DOE Working Groups, the U.S. Council for Automotive Research (USCAR) and the USCAR/DOE Driving Research and Innovation for Vehicle efficiency and Energy sustainability (U.S. Drive) Fuel Cell Technology Team. Assistance includes technical validation of new fuel cell materials and methods, single cell fuel cell testing to support the development of targets and test protocols, and regular advisory participation in other working groups and reviews. This assistance is made available to PEM fuel cell developers by request and DOE Approval. The objectives are to: (1) Support technically, as directed by DOE, fuel cell component and system developers; (2) Assess fuel cell materials and components and give feedback to developers; (3) Assist the DOE Durability Working Group with the development of various new material durability Testing protocols; and (4) Provide support to the U.S. Council for Automotive Research (USCAR) and the USCAR/DOE Fuel Cell Technology Team. FY2012 specific technical objectives are: (1) Evaluate novel MPL materials; (2) Develop of startup/ shutdown protocol; (3) Test the impact of hydrophobic treatment on graphite bi-polar plates; (4) Perform complete diagnostics on metal bi-polar plates for corrosion; and (5) Participate and lead efforts in the DOE Working Groups.

  1. Downstream Heat Flux Profile vs. Midplane T Profile in Tokamaks

    SciTech Connect (OSTI)

    Robert J. Goldston

    2009-08-20T23:59:59.000Z

    The relationship between the midplane scrape-off-layer electron temperature profile and the parallel heat flux profile at the divertor in tokamaks is investigated. A model is applied which takes into account anisotropic thermal diffusion, in a rectilinear geometry with constant density. Eigenmode analysis is applied to the simplified problem with constant thermal diffusivities. A self-similar nonlinear solution is found for the more realistic problem with anisotropically temperature-dependent thermal diffusivities. Numerical solutions are developed for both cases, with spatially dependent heat flux emerging from the plasma. For both constant and temperature-dependent thermal diffusivities it is found that, below about one-half of its peak, the heat flux profile shape at the divertor, compared with the midplane temperature profile shape, is robustly described by the simplest two-point model. However the physical processes are not those assumed in the simplest two-point model, nor is the numerical coefficient relating q||div to Tmp ?||mp/L|| as predicted. For realistic parameters the peak in the heat flux, moreover, can be reduced by a factor of two or more from the two-point model scaling which fits the remaining profile. For temperature profiles in the SOL region above the x-point set by marginal stability, the heat flux profile to the divertor can be largely decoupled from the prediction of the two-point model. These results suggest caveats for data interpretation, and possibly favorable outcomes for divertor configurations with extended field lines.

  2. Characterization of melting level clouds over the tropical western pacific warm pool

    SciTech Connect (OSTI)

    Jensen, M.; Johnson, K.; Billings, J.; Troyan, D.; Long, C.; Comstock, J.

    2010-03-15T23:59:59.000Z

    A cursory examination of historical ARSCL data indicates a common cloud feature in the tropics are thin detrainment shelves (Attendant Shelf Clouds, or ASCs) near the melting level (see figure for example). We use the ARSCL product to identify ASCs by defining them as cloud layers with bases above 4 km, a corresponding top below 6 km, and a thickness of less than 1 km. In order to prevent biases in determination of the diurnal cycle of cloud occurrence, we require that both the MMCR and MPL are operating well. In this study we use a total of 55 months of data collected over 14 years of deployments at the Manus, Nauru, and Darwin ARM sites in the Tropical Western Pacific to define the frequency of occurrence (~ 14% of the time) and diurnal cycle of these clouds, along with the atmospheric thermodynamic profile. We further investigate the horizontal extent, cloud radiative forcing, and cloud particle phase through a series of “golden cases” where there is a general absence of additional cloud types in the column and nearby deep convection. These cases indicate that the clouds can cover horizontal areas on the order of a GCM gridbox, have significant (but not always) cloud radiative forcing, and may be composed of liquid or ice water.

  3. The optical properties of equatorial cirrus in the pilot radiation observation experiment

    SciTech Connect (OSTI)

    Platt, C.M.R.; Young, S.A.; Manson, P.; Patterson, G.R. [CSIRO, Victoria (Australia)] [and others

    1996-04-01T23:59:59.000Z

    The development of a sensitive filter radiometer for the Atmospheric Radiation Measurement (ARM) Program has been reported. The aim was to develop a reliable and fast instrument that could be used alongside a lidar to obtain near realtime optical properties of clouds, particularly high ice clouds, as they drifted over an ARM Cloud and Radiation Testbed (CART) site allowing calculation of the radiation divergence in the atmosphere over the site. Obtaining cloud optical properties by the lidar/radiometer, or LIRAD, method was described by Platt et al.; the latter paper also describes a year`s data on mid-latitude cirrus. The optical properties of equatorial cirrus (i.e., cirrus within a few degrees of the equator) have hardly been studied at all. The same is true of tropical cirrus, although a few observations have been reported by Davis and Platt et al.This paper describes obersvations performed on cirrus clouds, analysis methods used, and results.

  4. What is the effect of LiDAR-derived DEM resolution on large-scale watershed model results?

    SciTech Connect (OSTI)

    Ping Yang; Daniel B. Ames; Andre Fonseca; Danny Anderson; Rupesh Shrestha; Nancy F. Glenn; Yang Cao

    2014-08-01T23:59:59.000Z

    This paper examines the effect of raster cell size on hydrographic feature extraction and hydrological modeling using LiDAR derived DEMs. LiDAR datasets for three experimental watersheds were converted to DEMs at various cell sizes. Watershed boundaries and stream networks were delineated from each DEM and were compared to reference data. Hydrological simulations were conducted and the outputs were compared. Smaller cell size DEMs consistently resulted in less difference between DEM-delineated features and reference data. However, minor differences been found between streamflow simulations resulted for a lumped watershed model run at daily simulations aggregated at an annual average. These findings indicate that while higher resolution DEM grids may result in more accurate representation of terrain characteristics, such variations do not necessarily improve watershed scale simulation modeling. Hence the additional expense of generating high resolution DEM's for the purpose of watershed modeling at daily or longer time steps may not be warranted.

  5. Continuous Profiles of Cloud Microphysical Properties for the Fixed Atmospheric Radiation Measurement Sites

    SciTech Connect (OSTI)

    Jensen, M; Jensen, K

    2006-06-01T23:59:59.000Z

    The Atmospheric Radiation Measurement (ARM) Program defined a specific metric for the third quarter of Fiscal Year 2006 to produce and refine a one-year continuous time series of cloud microphysical properties based on cloud radar measurements for each of the fixed ARM sites. To accomplish this metric, we used a combination of recently developed algorithms that interpret radar reflectivity profiles, lidar backscatter profiles, and microwave brightness temperatures into the context of the underlying cloud microphysical structure.

  6. Remote sensing of marine pollution. (Latest citations from Oceanic Abstracts). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-04-01T23:59:59.000Z

    The bibliography contains citations concerning the application of remote sensing to pollution in the ocean. Remote sensing techniques discussed include radiometry, lidar, radar, satellite observations, infrared scanning, laser spectrometry, acoustics, and microwaves. Articles address oil spills, coastal ecosystems, ocean dumping, dredging, and biological indications of marine pollution. Emphasis is placed on identifying and characterizing oil spills. (Contains a minimum of 154 citations and includes a subject term index and title list.)

  7. Remote sensing of marine pollution. (Latest citations from Oceanic Abstracts). Published Search

    SciTech Connect (OSTI)

    Not Available

    1994-04-01T23:59:59.000Z

    The bibliography contains citations concerning the application of remote sensing to pollution in the ocean. Remote sensing techniques discussed include radiometry, lidar, radar, satellite observations, infrared scanning, laser spectrometry, acoustics, and microwaves. Articles address oil spills, coastal ecosystems, ocean dumping, dredging, and biological indications of marine pollution. Emphasis is placed on identifying and characterizing oil spills. (Contains a minimum of 163 citations and includes a subject term index and title list.)

  8. Remote sensing of marine pollution. (Latest citations from Oceanic Abstracts). Published Search

    SciTech Connect (OSTI)

    NONE

    1995-11-01T23:59:59.000Z

    The bibliography contains citations concerning the application of remote sensing to pollution in the ocean. Remote sensing techniques discussed include radiometry, lidar, radar, satellite observations, infrared scanning, laser spectrometry, acoustics, and microwaves. Articles address oil spills, coastal ecosystems, ocean dumping, dredging, and biological indications of marine pollution. Emphasis is placed on identifying and characterizing oil spills. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  9. Remote sensing of marine pollution. (Latest citations from Oceanic abstracts). Published Search

    SciTech Connect (OSTI)

    NONE

    1997-03-01T23:59:59.000Z

    The bibliography contains citations concerning the application of remote sensing to pollution in the ocean. Remote sensing techniques discussed include radiometry, lidar, radar, satellite observations, infrared scanning, laser spectrometry, acoustics, and microwaves. Articles address oil spills, coastal ecosystems, ocean dumping, dredging, and biological indications of marine pollution. Emphasis is placed on identifying and characterizing oil spills. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  10. Remote sensing of marine pollution. (Latest citations from Oceanic Abstracts). Published Search

    SciTech Connect (OSTI)

    NONE

    1995-01-01T23:59:59.000Z

    The bibliography contains citations concerning the application of remote sensing to pollution in the ocean. Remote sensing techniques discussed include radiometry, lidar, radar, satellite observations, infrared scanning, laser spectrometry, acoustics, and microwaves. Articles address oil spills, coastal ecosystems, ocean dumping, dredging, and biological indications of marine pollution. Emphasis is placed on identifying and characterizing oil spills. (Contains a minimum of 117 citations and includes a subject term index and title list.)

  11. A Sub-10ps Time-to-Digital Converter with 204ns Dynamic Range For Time-resolved Imaging and Ranging Applications

    E-Print Network [OSTI]

    Narku-Tetteh, Noble Nii Nortey

    2014-01-06T23:59:59.000Z

    Photomultiplier Tube PV Process Voltage PVT Process Voltage and Temperature RADAR Radio Detection and Ranging RES Resolution SADFF Sense-Amplifier based D Flip Flop SSE Single-Shot Experiment SSP Single-Shot Precision TCSPC Time...] ................................................................ 3 Figure 1.2 Idealized waveforms on nodes VSPAD, VINV and VOUT illustrating the circuit operation when a photon is detected [26] ....................................... 3 Figure 1.3 Lidar system depiction diagram (fiber point type) [29...

  12. A study of a dual polarization laser backscatter system for remote identification and measurement of water pollution

    E-Print Network [OSTI]

    Sheives, Thomas Carlyle

    1974-01-01T23:59:59.000Z

    OF TABLES Table IV-1 Lidar Polarimeter Specifications ~Pa e 45 VI-1 Several Parameters Used for Computations in Single Scatter Model 65 VI-2 Scattering and Extinction Coefficients for Polystyrene Latex and Teflon Particles . 65 Values of Refractive... Up Aboard The Boat Excellence 55 55 57 59 VI-1 Comparison of Calculated Single Scatter Return with Experimental Data as a Function of Field of View and Latex Particle Concentration . . . . . 67 ~Fi ure VI-2 Comparison of Transmit...

  13. Open Access Data in Polar and Cryospheric Remote Sensing

    E-Print Network [OSTI]

    Pope, Allen; Rees, W. Gareth; Fox, Adrian J.; Fleming, Andrew

    2014-07-01T23:59:59.000Z

    to the original reconnaissance and topographic mapping purpose; photos provide a baseline for environmental variables purely because these features happen to be part of the topography. Following WWII, there was separately an intentional effort to use aerial... military cartographic cameras [4,5] and linking or surface matching to modern satellite or airborne images to improve measurements of historic glacier volume change on the Antarctic Peninsula [6,7]. Others use modern GPS or LiDAR data to fix ground...

  14. Delineating wetlands using geographic information system and remote sensing technologies

    E-Print Network [OSTI]

    Villeneuve, Julie

    2006-04-12T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . 73 a. Riverine Wetlands versus Upland Wetlands . . . . 73 b. Large Size Wetlands . . . . . . . . . . . . . . . . 74 c. Ground Truth Data Accuracy . . . . . . . . . . . 76 C. Results and Discussion . . . . . . . . . . . . . . . . . . . . 78 V... the ArcGIS ?ow accumulation function on the ?ow direction raster : : : 20 6 Line shape?le of high ?ow accumulation (more than 3055) ob- tained from the ?ow accumulation raster : : : : : : : : : : : : : : : : 21 7 DEM derived from LIDAR data (15cm vertical...

  15. REL ATRIO DE DESENVOLVIMENTO HUMANO 2007/2008 1 "O progresso humano no automtico nem inevitvel. Somos actualmente con ontados

    E-Print Network [OSTI]

    pobres do mundo, milhões de pessoas são já obrigadas a lidar com os impactos das alterações climáticas. Esses impactos não captam uma atenção de destaque nos meios de comunicação mundiais en- quanto eventos número de situações de seca, de tempestades mais violentas, de cheias, e de stress ambiental está

  16. Frequency doubling and sum-frequency mixing operation at 469.2, 471, and 473 nm in Nd:YAG

    E-Print Network [OSTI]

    Boyer, Edmond

    at around 445, 469, or 479 nm are required to pump these Pr3-doped laser hosts [8­13]. Gal- lium nitride (GaN decades for different applications [1­4] such as la- ser remote sensing (differential absorption LIDAR to an absorption band of Pr3 [14]. For that purpose the laser has to work on the 938.5 nm transition line of Nd

  17. ARM - Field Campaign - Marine ARM GPCI Investigation of Clouds (MAGIC)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links

  18. ARM - Field Campaign - Microwave Radiometer Profiler Evaluation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign

  19. ARM - Field Campaign - Mini-Shortwave IOP

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  20. ARM - Field Campaign - PGS Validatation

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    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar

  1. DE-FG02-08ER64658 (OASIS) - Final Technical Report

    SciTech Connect (OSTI)

    Sharman, Jonathan

    2013-09-05T23:59:59.000Z

    Project OASIS (Operation of Advanced Structures, Interfaces and Sub-components for MEAs) was a 12 month project that ran from 1st September 2008 to 31st August 2009, and was managed by the Department of Energy Office of Science, Chicago Office, as Award No DE-FG02-08ER64658, with Johnson Matthey Fuel Cells Inc. as the sole contractor. The project was completed on schedule, with technical successes (details below) and payment of the full grant award made by DOE. The aim of the project was the development of membrane electrode assemblies (MEAs) for H2/air polymer electrolyte membrane (PEM) fuel cells that would give higher performance under hot/dry and dry operating conditions, ideally with no loss of performance under wet conditions. Reducing or eliminating the need for humidifying the incoming gases will allow significant system cost and size reduction for many fuel cell applications including automotive, stationary and back-up power, and portable systems. Portable systems are also of particular interest in military markets. In previous work Johnson Matthey Fuel Cells had developed very stable, corrosion-resistant catalysts suitable for resisting degradation by carbon corrosion in particular. These materials were applied within the OASIS project as they are considered necessary for systems such as automotive where multiple start-stop events are experienced. These catalysts were contrasted with more conventional materials in the design of catalyst layers and novel microporous layers (MPLs) and gas diffusion layer (GDL) combinations were also explored. Early on in the work it was shown how much more aggressive high temperature operation is than dry operation. At the same humidity, tests at 110?C caused much more dehydration than tests at 80?C and the high temperature condition was much more revealing of improvements made to MEA design. Alloy catalysts were introduced and compared with Pt catalysts with a range of particle sizes. It was apparent that the larger particle sizes of the alloy catalysts led to a reduction in performance that offset much of their kinetic advantage. The Pt-only materials clearly showed that small particles are beneficial to good performance under hot/dry conditions, because of their higher surface area, although they are known to be less stable to cyclic operation. An ex-situ water vapour sorption technique was developed that showed a very clear correlation with in-cell performance: catalyst powders that absorbed more water gave better performance in-cell. It was shown that alloy catalysts could give a 25 mV advantage over Pt-only at 1 Acm-2. GDL design was also shown to influence performance and more permeable GDLs on the anode allowed better membrane hydration and therefore conductivity. A very impermeable GDL on the cathode caused cathode flooding even under dry conditions, but a novel cathode MPL incorporating ionomer and operating at 110?C, 33/17% RH showed a 150 mV gain at 800 mAcm-2 over the conventional MPL. This project has increased the understanding of the factors that influence performance loss under dry conditions, including the development of an insightful ex-situ characterisation technique (Dynamic Vapour Sorption). All the approaches investigated can be readily implemented in state-of the-art MEAs, although optimisation would be needed to integrate the new designs with existing MEA types and to tune to the exact range of operating conditions. The work is thus expected to benefit the public by feeding through more condition-tolerant production MEAs to a range of applications and thereby accelerate the commercialisation of fuel cell technology. In summary, a number of specific catalyst, catalyst layer, MPL and GDL improvements were made during this project. Often the best designs under dry conditions translated to some performance loss under wet conditions, but compromise situations were also found where dry performance was improved with no loss of wet performance.

  2. Self-bunching electron guns

    SciTech Connect (OSTI)

    Mako, F.M.; Len, L.K. [FM Technologies, Inc., 10529-B Braddock Road, Fairfax, Virginia 22032 (United States)

    1999-05-01T23:59:59.000Z

    We report on three electron gun projects that are aimed at power tube and injector applications. The purpose of the work is to develop robust electron guns which produce self-bunched, high-current-density beams. We have demonstrated, in a microwave cavity, self-bunching, cold electron emission, long life, and tolerance to contamination. The cold process is based on secondary electron emission. FMT has studied using simulation codes the resonant bunching process which gives rise to high current densities (0.01{endash}5 kA/cm{sup 2}), high charge bunches (up to 500 nC/bunch), and short pulses (1{endash}100 ps) for frequencies from 1 to 12 GHz. The beam pulse width is nominally {approximately}5{percent} of the {ital rf} period. The first project is the L-Band Micro-Pulse Gun (MPG). Measurements show {approximately}40 ps long micro-bunches at {approximately}20 A/cm{sup 2} without contamination due to air exposure. Lifetime testing has been carried out for about 18 months operating at 1.25 GHz for almost 24 hours per day at a repetition rate of 300 Hz and 5 {mu}s-long macro-pulses. Approximately 5.8{times}10{sup 13} micro-bunches or 62,000 coulombs have passed through this gun and it is still working fine. The second project, the S-Band MPG, is now operational. It is functioning at a frequency of 2.85 GHz, a repetition rate of 30 Hz, with a 2 {mu}s-long macro-pulse. It produces about 45 A in the macro-pulse. The third project is a 34.2 GHz frequency-multiplied source driven by an X-Band MPG. A point design was performed at an {ital rf} output power of 150 MW at 34.2 GHz. The resulting system efficiency is 53{percent} and the gain is 60 dB. The system efficiency includes the input cavity efficiency, input driver efficiency (a 50 MW klystron at 11.4 GHz), output cavity efficiency, and the post-acceleration efficiency. {copyright} {ital 1999 American Institute of Physics.}

  3. Evaluating Global Aerosol Models and Aerosol and Water Vapor Properties Near Clouds

    SciTech Connect (OSTI)

    Richard A. Ferrare; David D. Turner

    2011-09-01T23:59:59.000Z

    Project goals: (1) Use the routine surface and airborne measurements at the ARM SGP site, and the routine surface measurements at the NSA site, to continue our evaluations of model aerosol simulations; (2) Determine the degree to which the Raman lidar measurements of water vapor and aerosol scattering and extinction can be used to remotely characterize the aerosol humidification factor; (3) Use the high temporal resolution CARL data to examine how aerosol properties vary near clouds; and (4) Use the high temporal resolution CARL and Atmospheric Emitted Radiance Interferometer (AERI) data to quantify entrainment in optically thin continental cumulus clouds.

  4. STELLOPT Modeling of the 3D Diagnostic Response in ITER

    SciTech Connect (OSTI)

    Lazerson, Samuel A

    2013-05-07T23:59:59.000Z

    The ITER three dimensional diagnostic response to an n=3 resonant magnetic perturbation is modeled using the STELLOPT code. The in-vessel coils apply a resonant magnetic perturbation (RMP) fi eld which generates a 4 cm edge displacement from axisymmetry as modeled by the VMEC 3D equilibrium code. Forward modeling of flux loop and magnetic probe response with the DIAGNO code indicates up to 20 % changes in measured plasma signals. Simulated LIDAR measurements of electron temperature indicate 2 cm shifts on the low field side of the plasma. This suggests that the ITER diagnostic will be able to diagnose the 3D structure of the equilibria.

  5. A multichannel, synchronous laser signal processing system

    E-Print Network [OSTI]

    Hulse, William Colbern

    1974-01-01T23:59:59.000Z

    to the members of the Lidar Program staff, John Schell, Andrew Blanchard, and Homayoun Malek, and to the other members of the committee, Dr. V. T. Rhyne and Professor J. T. Kent for their help along the way. The author wishes to thank the typists, Mrs.... The Preliminary Specification Noise Considerations. Design Trade-Offs Final Design, Configuration and Operation ~Pa e 111 V1 V11 X1 XV 13 14 15 15 20 20 21 22 31 37 ~Ch t* The Synchronous Demodulator Introduction. A Preliminary...

  6. Cloudnet Project

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

    Hogan, Robin

    Cloudnet is a research project supported by the European Commission. This project aims to use data obtained quasi-continuously for the development and implementation of cloud remote sensing synergy algorithms. The use of active instruments (lidar and radar) results in detailed vertical profiles of important cloud parameters which cannot be derived from current satellite sensing techniques. A network of three already existing cloud remote sensing stations (CRS-stations) will be operated for a two year period, activities will be co-ordinated, data formats harmonised and analysis of the data performed to evaluate the representation of clouds in four major european weather forecast models.

  7. ARM - Evaluation Product - Cloud and Vertical Velocity Statistics from the

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-min (NAVBE1M)Doppler Lidar and Vertical

  8. ARM - Evaluation Product - Convective Vertical Velocity

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

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  9. ARM - Evaluation Product - Corrected Precipitation Radar Moments in Antenna

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-min (NAVBE1M)Doppler Lidar

  10. ARM - Evaluation Product - Critical soil quantities for describing land

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-min (NAVBE1M)Doppler Lidarproperties

  11. ARM - Evaluation Product - Multispectral Thermal Imager (MTI)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-minProductsMicroPulse LIDAR Cloud Optical

  12. ARM - Evaluation Product - NSA-Barrow AmeriFlux and Methane VAP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-minProductsMicroPulse LIDAR Cloud

  13. ARM - Evaluation Product - Organic Aerosol Component VAP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi1-minProductsMicroPulse LIDAR

  14. ARM - Field Campaign - MASRAD - Aerosol Optical Properties

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

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  15. ARM - Field Campaign - MASRAD: Cloud Condensate Nuclei Chemistry

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

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  16. ARM - Field Campaign - MASRAD: Cloud Study from the 2NFOV at Pt. Reyes

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACE Website ARMField Campaign

  17. ARM - Field Campaign - MASRAD: Pt. Reyes Stratus Cloud and Drizzle Study

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

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  18. ARM - Field Campaign - MArine Stratus Radiation Aerosol and Drizzle

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

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  19. ARM - Field Campaign - MOPITT Campaign

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

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  20. ARM - Field Campaign - MWR Campaign

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACE WebsitegovCampaignsMWR

  1. ARM - Field Campaign - MWR Inter-Comparison Study

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACE

  2. ARM - Field Campaign - MWR Temporary Sites

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

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  3. ARM - Field Campaign - Macquarie Island Cloud and Radiation Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign Links M-PACEgovCampaignsMWR

  4. ARM - Field Campaign - Marine ARM GPCI Investigation of Clouds (MAGIC):

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-High Sensitivity Aerosol

  5. ARM - Field Campaign - Marine ARM GPCI Investigations of Clouds (MAGIC):

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-High Sensitivity

  6. ARM - Field Campaign - Marine ARM GPCI Investigations of Clouds (MAGIC):

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-High SensitivityBridge

  7. ARM - Field Campaign - Marine ARM GPCI Investigations of Clouds (MAGIC):

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-High SensitivityBridgeCloud

  8. ARM - Field Campaign - Marine ARM GPCI Investigations of Clouds (MAGIC):

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

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  9. ARM - Field Campaign - Marine ARM GPCI Investigations of Clouds (MAGIC):

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-HighParsivel Disdrometer

  10. ARM - Field Campaign - Measuring Clouds at SGP with Stereo Photogrammetry

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) Campaign LinksUltra-HighParsivel

  11. ARM - Field Campaign - Microwave Radiometer Profiler Evaluation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) CampaigngovCampaignsMicrowave Radiometer Profiler

  12. ARM - Field Campaign - Midlatitude Continental Convective Clouds Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) CampaigngovCampaignsMicrowave Radiometer

  13. ARM - Field Campaign - Midlatitude Continental Convective Clouds Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) CampaigngovCampaignsMicrowave Radiometer(MC3E):

  14. ARM - Field Campaign - Millimeter-wave Radiometric Arctic Winter

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL) CampaigngovCampaignsMicrowave

  15. ARM - Field Campaign - Mixed-Phase Arctic Cloud Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-Phase Arctic Cloud Experiment

  16. ARM - Field Campaign - NSA Scanning Radar IOP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-Phase Arctic CloudgovCampaignsNSA

  17. ARM - Field Campaign - NSA Snow IOP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-Phase Arctic

  18. ARM - Field Campaign - NSF-Sponsored Aerosonde Project

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-Phase

  19. ARM - Field Campaign - Nauru99 Campaign

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-PhasegovCampaignsNauru99 Campaign

  20. ARM - Field Campaign - Observations and Modeling of the Green Ocean Amazon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa- Polarization Diversity Lidar (PDL)govCampaignsMixed-PhasegovCampaignsNauru99