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Characterization of MODIS VIS/NIR Spectral Band Detector-to-Detector DifferenceMODIS has 36 spectral bands with wavelengths in the visible (VIS), near-infrared (NIR), shortwave infrared (SWTR), mid-wave infrared (MWIR), and long-wave infrared (LWIR). It makes observations at three nadir spatial resolutions: 0,25km for bands 1-2 with 40 detectors per band, 0.5km for bands 3-7 with 20 detectors per band, and 1km for bands 8-36 with 10 detectors per band. The VIS, NIR, and S\VIR spectral bands are the reflective solar bands (RSB), which are calibrated on-orbit by a solar diffuser (SD). In addition, MODIS lunar observations are used to track the RSB calibration stability. In this study, we examine detector-to-detector calibration difference for the VIStNIR spectral bands using the SD and lunar observations. The results will be compared with an independent analysis with additional information, such as polarization correction, derived from standard ocean color data products. The current MODIS RSB calibration approach only carries a band-averaged RVS (response versus scan angle) correction. The results from this study suggest that a detector-based RVS correction should be used to improve the L1B data quality, especially for several VIS bands in Terra MODIS due to large changes of the scan mirror's optical properties in recent years.
Document ID
20080030270
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Xiong, X.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sun, J.
(Science Systems and Applications, Inc. Lanham, MD, United States)
Meister, G.
(FutureTech Corp. Greenbelt, MD, United States)
Kwiakowska, E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2008
Subject Category
Space Radiation
Distribution Limits
Public
Copyright
Other

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