Remote Sens., Volume 11, Issue 24 (December-2 2019) – 173 articles
Cover Story (view full-size image): This work investigates the sensitivity to the aerosol optical depth (AOD) of the current and future geostationary weather satellites. The sensitivity to AOD is quantified as the difference between the albedo of the surface and the corresponding critical surface albedo (CSA). CSA refers to the value of surface reflectivity for which the reflectance measured by the satellite at the top of the atmosphere becomes insensitive to AOD. The figure shows the yearly-averaged departure from CSA for several channels of the imagers aboard the European Meteosat satellites. Warm colors highlight the regions that are far away from CSA, thus corresponding to favorable conditions for AOD retrieval. By contrast, cool colors highlight challenging conditions. Departure from CSA strongly depends on the spectral fingerprints of surface albedo and aerosol extinction properties.View this paper.
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