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Proceedings Paper

Hyperspectral sounder performance for cold scenes
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Paper Abstract

We investigate the use of 200K scenes as a valuable “stress test” for the evaluation of the calibration of AIRS and CrIS. Under these conditions both instruments show artifacts much larger than the nominal stated radiometric accuracy of about 0.1-0.2 K. Except for the AIRS shortwave trend, both instruments clearly perform well at the 1 K level even for these extremely low scene temperatures. Unfortunately, changes in extremes, in this case cold extremes, are of great interest to the evaluation of climate change effects, such as changes in the height of the tropopause or the frequency of severe storms. The evaluation of the AIRS performance at extremely low scene temperatures has been key to identifying the need for updating the polarization coefficients in the L1B software Version 7. These changes are expected to eliminate a large fraction of the observed AIRS artifacts. The CrIS instrument teams is also working on refining the calibration.

Paper Details

Date Published: 5 September 2017
PDF: 10 pages
Proc. SPIE 10402, Earth Observing Systems XXII, 1040225 (5 September 2017); doi: 10.1117/12.2273398
Show Author Affiliations
Evan M. Manning, Jet Propulsion Lab. (United States)
Hartmut H. Aumann, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 10402:
Earth Observing Systems XXII
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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