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Title: High spectral resolution measurements for the ARM Program. [Atmospheric Radiation Measurement (ARM)]

Technical Report ·
OSTI ID:5118424

The University of Wisconsin teamed with the University of Denver for the design and fabrication of high spectral resolution FTIR (Fourier Transform Infrared) instrumentation for the CART sites of the Atmospheric Radiation Measurement (ARM) Program began on September 15, 1990. This year-one report summarizes progress from the start date to March 15, 1991. The project is currently on schedule to achieve the primary objectives of the first year. The ultimate objective of this grant is to develop three different types of instruments, named the AERI, AERI-X, and SORTI. The Atmospheric Emitted Radiance Interferometer (AERI) is the simplest. It will be available for early deployment at the first ARM site and will be deployable at several locations in the extended network to give horizontal coverage. The AERI will be an 0.5 cm{sup {minus}1} resolution (unapodized) instrument, which measures accurately calibrated radiance spectra for radiation studies and for remote sensing of atmospheric state variables. It would also be feasible to design an AERI for an aircraft or tethered balloon platform, although this is not a part of the current grant. The AERI-X and the SORTI are higher spectral resolution instruments for obtaining the highest practical resolution for spectroscopy at the ARM central sites. The AERI-X, like the AERI, will measure atmospheric emitted radiance, but with resolutions as high as 0.1 cm{sup {minus}1}. The Solar Radiance Transmission Interferometer (SORTI) will measure the total transmission of the atmosphere by tracking the sun as the atmospheric air mass changes. The large solar signal makes it practical for this instrument to offer the ultimate in spectral resolution, 0.002 cm{sup {minus}1}.

Research Organization:
Wisconsin Univ., Madison, WI (United States). Space Science and Engineering Center
Sponsoring Organization:
USDOE; USDOE, Washington, DC (United States)
DOE Contract Number:
FG02-90ER61057
OSTI ID:
5118424
Report Number(s):
DOE/ER/61057-1; ON: DE92000765
Country of Publication:
United States
Language:
English