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Proceedings Paper

The precision and accuracy of AIRS level 1B radiances for climate studies
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Paper Abstract

We investigate uncertainties in the Atmospheric Infrared Sounder (AIRS) radiances based on in-flight and pre-flight calibration algorithms and observations. The global coverage and spectral resolution (~ 1200) of AIRS enable it to produce a data set that can be used as a climate data record over the lifetime of the instrument. Therefore, we examine the effects of the uncertainties in the calibration and the detector stability on future climate studies. The uncertainties of the parameters that go into the AIRS radiometric calibration are propagated to estimate the accuracy of the radiances and any climate data record created from AIRS measurements. The calculated radiance uncertainties are consistent with observations. Algorithm enhancements may be able to reduce the radiance uncertainties by as much as 7%. We find that the orbital variation of the gain contributes a brightness temperature bias of < 0.01 K. Although this can be removed by algorithm enhancements, it is smaller than uncertainty of the gain for most channels.

Paper Details

Date Published: 20 January 2005
PDF: 12 pages
Proc. SPIE 5655, Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, (20 January 2005); doi: 10.1117/12.578991
Show Author Affiliations
Thomas J. Hearty, Jet Propulsion Lab. (United States)
Steve Gaiser, Jet Propulsion Lab. (United States)
Thomas Pagano, Jet Propulsion Lab. (United States)
Hartmut Aumann, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 5655:
Multispectral and Hyperspectral Remote Sensing Instruments and Applications II
Allen M. Larar; Makoto Suzuki; Qingxi Tong, Editor(s)

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