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23 December 1994 Evaluation of high-resolution atmospheric sounder designs
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Temperature and humidity sounding of the atmosphere from polar orbit meteorological satellites is currently carried out by combining data from infrared and microwave sounding radiometers. The High Resolution Infrared Sounder, the current operational infrared sounder, has 20 channels and accomplishes spectral separation with a filter wheel. This small number of channels limits the accuracy and vertical resolution of sounding and is thereby one of the limiting factors to the accuracy of numerical weather prediction. Studies have shown that infrared sounders with 1000 to 2000 channels can provide the desired 1 K accuracy and 1 km vertical resolution. NASA is developing the Atmospheric Infrared Sounder, which uses gratings for spectral separation. There are several infrared sounders under development that use Michelson interferometers for spectral separation.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joe A. Jenney "Evaluation of high-resolution atmospheric sounder designs", Proc. SPIE 2309, Passive Infrared Remote Sensing of Clouds and the Atmosphere II, (23 December 1994);

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