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Preliminary radiometric calibration assessment of ALOS AVNIR-2

By:
, , , ,
DOI: 10.1109/IGARSS.2007.4423393

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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
Number of Pages:
4
Conference Title:
2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
Conference Location:
Barcelona
Conference Date:
23 June 2007 through 28 June 2007