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8 February 2002 Enhancement of spectral separation performance for ASTER/SWIR
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The mechanism of the crosstalk phenomena in the ASTER/SWIR subsystem, which has six bands in the wavelength of 1.6 - 2.43 micrometers region, is investigated. It is found that the incident light to a detector array of the band 4 of the SWIR subsystem is reflected at an electrical wiring at the focal plane. It is transported to detectors of other bands by multiple reflections through the bandpass filter in front of detectors. By analyzing SWIR images around islands and peninsulas, crosstalk components in images are estimated. For this purpose, the crosstalk correction software is developed. Parameters of the crosstalk phenomena, i.e., the amount of stray light and the influential area of stray light, are determined by image analysis. It is found that the spectral separation performance of the SWIR subsystem is enhanced using the correction software in this study, which leads to more accurate spectral studies of SWIR images and is promising in exploiting natural resources.
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Akira Iwasaki, Hiroyuki Fujisada, Hiroshi Akao, Osamu Shindou, and Shigeki Akagi "Enhancement of spectral separation performance for ASTER/SWIR", Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002);


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