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Validation of MERIS remote sensing reflectance in Atlantic case 1 waters with ground based in-situ measurements

Anja Theis(1), Bettina Schmitt(1), Steffen Gehnke(2), Roland Doerffer(2) and Astrid Bracher(1)

(1) Alfred-Wegener-Institute, P.O. Box 120161, 27515 Bremerhaven, Germany
(2) GKSS Institute for Coastal Research, Max Planck-Str. 1, 21502 Geesthacht, Germany

Abstract

In this study MERIS remote sensing reflectance at sea surface for case 1 waters are validated with in-situ measurements. The in-situ data sets are collected during three ship cruises across the Atlantic Ocean, two with RV Polarstern cruises (November 2007 and April / May 2008) and one with RV Merian (July / August 2008) and taken with a system of three TriOS-RAMSES hyperspectral spectroradiometers, that measure above-water upwelling radiance, downwelling irradiance and sky radiance from which the water leaving remote sensing reflectance is calculated. Results help to evaluate the atmospheric correction applied to MERIS case-1 data and are used to interpret the comparisons of in-situ measured chla and MERIS algal-1 chl a .

 

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