POSTEL Radiation Surface Albedo
The “radiation” biogeophysical products of Postel are spatialized variables derived from optical or micro-wave sensors measurements acquired over many years at regional to global scales. The albedo is the fraction of the incoming solar radiation reflected by the land surface, integrated over the whole viewing directions. The albedo can be directional (calculated for a given sun zenith angle, also called “black-sky albedo”) or hemispheric (integrated over all illumination directions, also called “white-sky albedo”), spectral (for each narrow band of the sensor) or broadband (integrated over the solar spectrum). The surface albedos are derived from many sensors (Vegetation, Polder, Meteosat) in the frame of different projects, namely Geoland and Amma.
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