Design and development considerations for SIRAS-G, the Spaceborne Infrared Atmospheric Sounder for Geosynchronous Earth Orbit

Dan L. Michaels; Thomas U. Kampe; Paul Hendershott; Gary L. Mills; Grzegorz Miecznik; Peter Johnson

doi:10.1117/12.579839

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20 January 2005 Design and development considerations for SIRAS-G, the Spaceborne Infrared Atmospheric Sounder for Geosynchronous Earth Orbit

Dan L. Michaels, Thomas U. Kampe, Paul Hendershott, Gary L. Mills, Grzegorz Miecznik, Peter Johnson

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Proceedings Volume 5655, Multispectral and Hyperspectral Remote Sensing Instruments and Applications II; (2005) https://doi.org/10.1117/12.579839
Event: Fourth International Asia-Pacific Environmental Remote Sensing Symposium 2004: Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2004, Honolulu, Hawai'i, United States

Abstract

BATC is developing the Spaceborne Atmospheric Infrared Sounder for Geosynchronous Earth Orbit (SIRAS-G) under NASA's 2002 Instrument Incubator Program. SIRAS-G represents a new approach to infrared imaging spectrometry suitable for Earth observation from geosynchronous orbit. SIRAS-G is an instrument concept with lower mass and power requirements than contemporary instruments that offers enhanced capabilities for measuring atmospheric temperature, water vapor, and trace gas column abundances in a compact package. In addition, the SIRAS-G concept is adaptable to airborne, low-Earth orbit and geosynchronous deployment. SIRAS-G employs a wide field-of-view hyperspectral infrared optical system that splits the incoming radiation to four separate grating spectrometer channels. Combined with large 2-D focal planes, this system provides simultaneous spectral and high-resolution spatial imaging designed to measure infrared radiation in 2048 spectral channels with a nominal spectral resolution (l/Dl) of between 700 and 1400. Design parameters and the associated basic design trades for a SIRAS-G laboratory demonstration instrument are presented in this paper. Results of completed instrument design analyses along with instrument performance predictions are included. Using these performance predictions, we offer a comparison of current technology with SIRAS-G's capabilities for measuring atmospheric temperature, water vapor profiles, and trace gas column abundances.

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Dan L. Michaels, Thomas U. Kampe, Paul Hendershott, Gary L. Mills, Grzegorz Miecznik, and Peter Johnson "Design and development considerations for SIRAS-G, the Spaceborne Infrared Atmospheric Sounder for Geosynchronous Earth Orbit", Proc. SPIE 5655, Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, (20 January 2005); https://doi.org/10.1117/12.579839

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