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Preliminary radiometric calibration assessment of ALOS AVNIR-2

January 1, 2008

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. All 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.

Publication Year 2008
Title Preliminary radiometric calibration assessment of ALOS AVNIR-2
DOI 10.1109/IGARSS.2007.4423393
Authors M. Bouvet, P. Goryl, G. Chander, R. Santer, S. Saunier
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70031824
Record Source USGS Publications Warehouse
USGS Organization Earth Resources Observation and Science (EROS) Center