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The impact of sun glint on the retrieval of water parameters and possibilities for the correction of MERIS scenes

Roland Doerffer(1), Helmut Schiller(1), J├╝rgen Fischer(2), Rene Preusker(2) and Marc Bouvet(3)

(1) GKSS Research Center, Max-Planck-Str. 1, 21502 Geesthacht, Germany
(2) Institute for Space Research, Free University, Berlin, Germany
(3) ESA, ESTEC, Noordwijk, Netherlands

Abstract

Specularly reflected sun light is the strongest signal of the water surface in MERIS scenes. It can contaminate half of the image and by this causes a tremendous loss of information. Its distribution depends on the solar and observation angles and the roughness of the sea. To find ways of its correction we have analyzed MERIS scenes of different water types, atmospheres and sun glint conditions. Furthermore, sun glint conditions have been simulated using a Monte Carlo photon tracing code, where sun glint photons could be traced separately. Using this model sensitivity studies have been performed to determine to which extend sun glint contaminated scenes of different water types can be corrected. For the correction Neural Network and table look up procedure were developed and tested.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry