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Proceedings Paper

Improvement of ASTER/SWIR crosstalk correction
Author(s): Hideyuki Tonooka; Akira Iwasaki
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Paper Abstract

Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), one of five sensors on Terra, has bands 4 to 9 in the short-wave infrared (SWIR) region. These bands, particularly bands 5 and 9, are affected by band-to-band crosstalk. A crosstalk correction algorithm already developed is practically used for reducing a leaked ghost image, but does not satisfactorily work for all scenes. We therefore analyze crosstalk effects in more detail for improving this algorithm. As the results, it is shown that crosstalk includes several band-to-band/intra-band components, and the cause of each component is estimated to be reflection, scattering, and/or refraction in a CCD chip and/or interference filters. Based on these facts, a new crosstalk correction algorithm is developed by improving the original algorithm. In the new algorithm, all known crosstalk components are included, kernel functions for convolution with a source image are updated, and sensitivity correction applied for keeping consistency with radiometric calibration is improved. Comparison results indicate that the new algorithm reduces ghost images more correctly than the original algorithm.

Paper Details

Date Published: 2 February 2004
PDF: 12 pages
Proc. SPIE 5234, Sensors, Systems, and Next-Generation Satellites VII, (2 February 2004); doi: 10.1117/12.511811
Show Author Affiliations
Hideyuki Tonooka, Ibaraki Univ. (Japan)
Akira Iwasaki, Energy Electronics Institute/AIST (Japan)

Published in SPIE Proceedings Vol. 5234:
Sensors, Systems, and Next-Generation Satellites VII
Roland Meynart; Joan B. Lurie; Steven P. Neeck; Michelle L. Aten; Haruhisa Shimoda, Editor(s)

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