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Earth Observing-1 Advanced Land Imager Flight Performance Assessment: Absolute Radiometry and Stability During the First YearThe absolute radiometry of the Advanced Land Imager during the first year on orbit (November 21,2000 - November 21, 2001) is presented. Results derived from solar, lunar, ground truth, and internal reference lamp measurements are presented. An 18% drop in the radiometric response of the Band 1p data since preflight calibration at Lincoln Laboratory is observed using all techniques. This decrease cannot be accounted for by preflight calibration errors, stray light, or contamination of the focal plane. A slight drooping of the VNIR response toward the blue and a 5-12% increase in the Band 5 response is also apparent in all the data. Radiometric response correction factors have been calculated and preflight calibration coefficients have been updated in order to provide +/- 5% agreement between the measured solar, lunar, and ground truth data and the expected values. The radiometric stability of the ALI during the first year of operation is also presented for each spectral band. Internal reference lamp data indicate the focal plane has been stable to within 1% for bands 1p, 1, 2, 5p, 5, 7, pan and 3% for Bands 3,4, 4p since launch. Solar, lunar, and ground truth measurements indicate the optical train and solar diffuser of the instrument has been stable to within 1% since initial measurements on orbit in late December 2000.
Document ID
20020064934
Acquisition Source
Goddard Space Flight Center
Document Type
Other
Authors
Mendenhall, J. A.
Lencioni, D. E.
Date Acquired
September 7, 2013
Publication Date
May 31, 2002
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
PR-EO-1-10
AD-A403474
ESC-TR-TR-2001-071
Funding Number(s)
CONTRACT_GRANT: F19628-00-C-0002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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