Preliminary radiometric calibration assessment of ALOS AVNIR-2

Bouvet, M.; Goryl, P.; Chander, G.; Santer, R.; Saunier, S.

Abstract:

This paper summarizes the activities carried out in the frame of the data quality activities of the Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2) sensor onboard the Advanced Land Observing Satellite (ALOS). Assessment of the radiometric calibration of the AVNIR-2 multi-spectral imager is achieved via three intercomparisons to currently flying sensors over the Libyan desert, during the first year of operation. AU three methodologies indicate a slight underestimation of AVNIR-2 in band 1 by 4 to 7% with respect to other sensors radiometric scale. Band 2 does not show any obvious bias. Results for band 3 are affected by saturation due to inappropriate gain setting. Two methodologies indicate no significant bias in band 4. Preliminary results indicate possible degradations of the AVNIR-2 channels, which, when modeled as an exponentially decreasing functions, have time constants of respectively 13.2 %.year-1, 8.8%.year-1 and 0.1%.year-1 in band 1, 2 and 4 (with respect to the radiometric scale of the MEdium Resolution Imaging Spectrometer, MERIS). Longer time series of AVNIR-2 data are needed to draw final conclusions. ?? 2007 IEEE.

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Conference Paper

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70031824

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Bouvet, M.; Goryl, P.; Chander, G.; Santer, R.; Saunier, S.

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2676

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English

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International Geoscience and Remote Sensing Symposium (IGARSS)

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Preliminary radiometric calibration assessment of ALOS AVNIR-2; 2008; Conference Paper; International Geoscience and Remote Sensing Symposium (IGARSS); Bouvet, M.; Goryl, P.; Chander, G.; Santer, R.; Saunier, S.