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Improvement of instrument line shape of IMG
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Paper Abstract

The interferometric Monitor for Greenhouse gases (IMG) measured the high-resolution infrared spectra emitted from Earth from October 1996 to June 1997. It is a Fourier Transform Spectrometer based on the Michelson interferometer achieving 0.05 cm-1 wavenumber resolution and covers between 660 cm-1 and 3030 cm-1 with three infrared detectors. Since detectors are large and are not located in the center of the field of view (FOV), the instrument line shape (ILS) is shifted and widened. In this paper, we describe the ILS theoretical model and evaluate it by comparing the synthesized spectrum with the IMG observed spectrum. We checked the improvement of ILS by the FOV geometry. The retrieval accuracy will be improved by using this ILS model in the retrieval program.

Paper Details

Date Published: 8 February 2002
PDF: 8 pages
Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002); doi: 10.1117/12.455114
Show Author Affiliations
Shunsuke Ichizawa, National Space Development Agency of Japan (Japan)
Kayoko Kondo, National Space Development Agency of Japan (Japan)
Makoto Suzuki, National Space Development Agency of Japan (Japan)
Haruhisa Shimoda, National Space Development Agency of Japan (Japan)
Toshihiro Ogawa, National Space Development Agency of Japan (Japan)

Published in SPIE Proceedings Vol. 4486:
Infrared Spaceborne Remote Sensing IX
Marija Strojnik; Bjorn F. Andresen, Editor(s)

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