23 December 1994 Far-infrared Fabry-Perot spectrometer as satellite-based atmospheric limb sounder
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An excellent instrument to observe the emission lines of OH in the far infrared is a cooled scanning Fabry-Perot (FP) where the orders are selected by means of a grating monochromator. A compact liquid helium cooled prototype has been built for airplane missions. A similar device is the OHIO instrument, proposed for limb observations from a satellite and applying detectors in conjunction with space-qualified refrigerators. Compared with heterodyne receivers, an FP at 80 K offers a comparable sensitivity in the 100 (mu) wavelength region and much better values with bolometric detectors optimized for lower temperatures. Compared to satellite-borne Fourier Transform Spectrometers (FTS), the FP instrument is more sensitive at 80 K; the FTS measures many superfluous spectral elements. The FP is superior at temperatures low enough to allow photon-noise-limited detector operation.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jan J. Wijnbergen, Jan J. Wijnbergen, Paul de Valk, Paul de Valk, John P. Burrows, John P. Burrows, Kelly Van Chance, Kelly Van Chance, Wolfgang Schneider, Wolfgang Schneider, "Far-infrared Fabry-Perot spectrometer as satellite-based atmospheric limb sounder", Proc. SPIE 2309, Passive Infrared Remote Sensing of Clouds and the Atmosphere II, (23 December 1994); doi: 10.1117/12.196687; https://doi.org/10.1117/12.196687

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