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Appendix I: Is Sunglint Observable in the Thermal Infrared?
The short answer is yes. Orbiting spacecraft like GOES, AVHRR, ASTER, MODIS, and ATSR all have spectral observation windows in the thermal infrared. They all have to deal with sunglint at least some of the time. It is not just a minor nuisance, but a major effect that saturates their sensors. A saturated sensor gives no indication of the actual magnitude; all information from that direction is lost. The directional characteristics of sunglint have been adequately treated by Maurice Cox. This report deals with the radiometric aspects, the magnitude of the sunglint in comparison with the magnitude of normal target thermal emission.
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