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A Precise “Smile-Correction” for MERIS Oxygen Band

Helmut Schiller(1) and Hajo Krasemann(1)

(1) GKSS Research Centre, Inst.f.Coastal Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany

Abstract

The precise knowledge of the radiance in MERIS band 760.3 is of high value for giving information on the amount of air, resp. oxygen the light has passed before being reflected. The value recorded by the instrument is distorted by a wavelength shift depending on the pixel position within the camera. We describe a method to correct for this fact known as “smile-correction” and illustrate the performance of the correction. In a first step the radiance unaffected from oxygen absorption is determined, then the observed absorption is corrected for wavelength shift assuming a standard atmosphere and known wavelength-shift for each single pixel.

 

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