Radiometric calibration stability of the EO-1 advanced land imager: 5 years on-orbit

By: , and 



The Advanced Land Imager (ALI) was developed as a prototype sensor for follow on missions to Landsat-7. It was launched in November 2000 on the Earth Observing One (EO-1) satellite as a nominal one-year technology demonstration mission. As of this writing, the sensor has continued to operate in excess of 5 years. Six of the ALl's nine multi-spectral (MS) bands and the panchromatic band have similar spectral coverage as those on the Landsat-7 ETM+. In addition to on-board lamps, which have been significantly more stable than the lamps on ETM+, the ALI has a solar diffuser and has imaged the moon monthly since launch. This combined calibration dataset allows understanding of the radiometric stability of the ALI system, its calibrators and some differentiation of the sources of the changes with time. The solar dataset is limited as the mechanism controlling the aperture to the solar diffuser failed approximately 18 months after launch. Results over 5 years indicate that: the shortest wavelength band (443 nm) has degraded in response about 2%; the 482 nm and 565 nm bands decreased in response about 1%; the 660 nm, 790 nm and 868 nm bands each degraded about 5%; the 1250 nm and 1650 nm bands did not change significantly and the 2215 nm band increased in response about 2%.
Publication type Conference Paper
Publication Subtype Conference Paper
Title Radiometric calibration stability of the EO-1 advanced land imager: 5 years on-orbit
ISBN 0819464562; 9780819464569
DOI 10.1117/12.690058
Volume 6361
Year Published 2006
Language English
Larger Work Title Proceedings of SPIE - The International Society for Optical Engineering
Conference Title Sensors, Systems, and Next-Generation Satellites X
Conference Location Stockholm
Conference Date 11 September 2006 through 13 September 2006
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