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Challenges are frequently encountered in the development of new environmental sensors that pose serious risks to the successful retrieval of geophysical products. Electronic and optical cross-talk are part of those challenges that exist in the current design of the focal planes being used in many sensors such as MODIS. This paper describes an approach to assess the level of optical and electronic cross-talk on the measured radiance, and thereafter, the retrieval of geophysical products using MODIS Level 1 data sets. In this study, a set of electronic and optical cross-talk coefficients are postulated. These coefficients are sender-receiver influence coefficients and represent a system signal contamination on any detector on a focal plane when another detector on that focal plane is stimulated with a geophysical signal. This approach involves using the postulated cross-talk coefficients on an actual set of MODIS data granules. The original MODIS data granules and the cross-talk impacted granules can be used with validated geophysical algorithms to create the derived products. Comparison of the products affected by cross-talk with those without cross-talk will identify potential problems and their occurrences over various climatic and surface regions.
Date of Conference: 23-28 July 2007