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Preliminary radiometric calibration assessment of ALOS AVNIR-2

By: , , , , and 
https://doi.org/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. 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 type Conference Paper
Publication Subtype Conference Paper
Title Preliminary radiometric calibration assessment of ALOS AVNIR-2
DOI 10.1109/IGARSS.2007.4423393
Year Published 2008
Language English
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 4 p.
Larger Work Type Book
Larger Work Subtype Conference publication
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, Spain
Conference Date Jun 23-28, 2007
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