Preliminary radiometric calibration assessment of ALOS AVNIR-2

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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.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Preliminary radiometric calibration assessment of ALOS AVNIR-2
ISBN 1424412129; 9781424412129
DOI 10.1109/IGARSS.2007.4423393
Year Published 2008
Language English
Larger Work Title International Geoscience and Remote Sensing Symposium (IGARSS)
First page 2673
Last page 2676
Conference Title 2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
Conference Location Barcelona
Conference Date 23 June 2007 through 28 June 2007