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Cross Calibration of TOMS, SBUV/2 and SCIAMACHY Radiances from Ground ObservationsWe have shown that validation of radiances is a very effective means for correcting absolute accuracy and long term drifts of backscatter type satellite measurements. This method by-passes the algorithms used for both satellite and ground based measurements which are normally used to validate and correct the satellite data. A new method for satellite validation is planned which will compliment measurements from the existing ground-based networks. This method will employ very accurate comparisons between ground based zenith sky radiances and satellite nadir radiances. These comparisons will rely heavily on the experience derived from the Shuttle SBUV (SSBUV) program which provided a reference standard of radiance measurements for SBUV/2, TOMS, and GOME. This new measurement program, called 'Skyrad', employs two well established capabilities at the Goddard Space Flight Center, 1) the SSBUV calibration facilities and 2) the radiative transfer codes used for the TOMS and SBUV/2 algorithms and their subsequent refinements. Radiative transfer calculations show that ground based zenith sky and satellite nadir backscatter ultraviolet comparisons can be made very accurately under certain viewing conditions. The Skyrad instruments (SSBUV, Brewer spectrophotometers, and possibly others) will be calibrated and maintained to a precision of a few tenths of a percent. Skyrad data will then enable long term calibration of upcoming satellite instruments such as QuickTOMS, SBUV/2s and SCIAMACHY with a high degree of precision. This technique can be further employed to monitor the performance of future instruments such as GOMEZ, OMI, and OMPS. Additional information is included in the original extended abstract.
Document ID
20020083161
Document Type
Conference Paper
Authors
Hilsenrath, Ernest (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bhartia, P. K. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bojkov, B. (Science Systems and Applications, Inc. Lanham, MD United States)
Kowaleski, M. (Science Systems and Applications, Inc. Lanham, MD United States)
Labow, G. (Science Systems and Applications, Inc. Lanham, MD United States)
Ahmad, Z. (Science and Data Systems, Inc. Silver Spring, MD United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Environment Pollution
Meeting Information
International Geoscience and Remote Sensing Symposium Conference (IGARSS)(Toronto)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.