18 January 2002 Spectral test and calibration of the atmospheric infrared sounder
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Abstract
Spectral characterization of the Atmospheric Infrared Sounder (AIRS) instrument during ground Thermal/Vacuum tests posed a number of difficult challenges due to the high spectral resolution and accurate knowledge requirements. A Fourier transform spectrometer was used in external step-scan mode to characterize the spectral response functions (SRFs) of the 2378 infrared detectors in the focal plane array which is part of the AIRS grating spectrometer. This paper summarizes the test development and characterization results. Special post-test data analysis was needed separately to determine the effects of interference in the order-separating entrance filters, which have a different temperature dependence from that of the otherwise unperturbed SRFs. This separation, which was successfully accomplished, provides calibration of the AIRS SRF shape over the full expected range of instrument temperatures.
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Margaret H. Weiler, Margaret H. Weiler, L. Larrabee Strow, L. Larrabee Strow, Scott E. Hannon, Scott E. Hannon, Steven L. Gaiser, Steven L. Gaiser, Rudolf A. Schindler, Rudolf A. Schindler, Kenneth Overoye, Kenneth Overoye, Hartmut H. Aumann, Hartmut H. Aumann, } "Spectral test and calibration of the atmospheric infrared sounder", Proc. SPIE 4483, Earth Observing Systems VI, (18 January 2002); doi: 10.1117/12.453471; https://doi.org/10.1117/12.453471
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