15 November 2000 Tracking MODIS gain change on-orbit by relating it to SRCA lamp parameters
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This paper addresses the methodology and algorithm for using the Spectro-Radiometric Calibration Assembly (SRCA) lamp electrical parameters to track its output band radiance change. This allows the use of the SRCA to track MODurate resolution Imaging Spectroradiometer (MODIS) detector gain variation at different orbit positions because the MODIS dn change is attributed to its gain change after subtracting the SRCA output radiance change itself. Pre-launch test data show that using lamp current as a parameter is valid. Orbit data prove that the approach is valid for longer periods of time for all Solar Reflective Bands (SRBs). Data indicate that the MODIS has undetectable gain change at different orbit positions.
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Harry E. Montgomery, Nianzeng Che, Jeff Bowser, "Tracking MODIS gain change on-orbit by relating it to SRCA lamp parameters", Proc. SPIE 4135, Earth Observing Systems V, (15 November 2000); doi: 10.1117/12.494247; https://doi.org/10.1117/12.494247

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