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The absolute radiometric calibration of the advanced very high resolution radiometerThe early results of an absolute radiometric calibration of the NOAA-9 AVHRR sensor indicate significant degradations in the response of bands 1 and 2 compared to prelaunch values. The results are currently in the process of being verified and it may be that refinements of the methodology will be in order as additional data sets are analyzed. The LANDSAT TM calibration used in this approach is known to be very precise and the Herman radiative transfer code, supplemented by the 5-S code for gaseous transmission, is reliable as well. The extent to which other steps in the analysis procedure give rise to uncertainties in the results is currently under investigation. Particular attention is being given to the geometric matching of the AVHRR and TM imagery, as well as to the spectral redistribution procedure. By taking advantage of a reasonably precise calibration of TM imagery acquired on the same day as the AVHRR data at White Sands, a promising approach to the in-orbit calibration of AVHRR sensors is being developed. Current efforts involve primarily the examination of additional test cases and the investigation of possible simplifications in the procedure through judicious use of atmospheric models.
Document ID
19870018556
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Slater, P. N.
(Arizona Univ. Tucson, AZ, United States)
Teillet, P. M.
(Arizona Univ. Tucson, AZ, United States)
Mao, Y.
(Arizona Univ. Tucson, AZ, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1987
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-CR-181236
NAS 1.26:181236
Accession Number
87N27989
Funding Number(s)
CONTRACT_GRANT: NAG5-859
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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