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Compensating for optical heterogeneity in extreme case-2 waters

Annelies Hommersom(1) and Steef Peters(1)

(1) IVM, de boelelaan 1087, 1081 HV Amsterdam, Netherlands


The Dutch Wadden Zee is an area with a very large diversity in concentrations and IOPs of optical active consituents. This heterogeneity may induce large errors in retrieved contrations when using a single optical model with one median or averaged set of SIOPs. Methods have been developed by CSIRO to apply multiple optical models to each pixel of a satellite image (MODIS) and to select the best fitting model per pixel. Not only does this provide an improved closure between simulated and measured reflectance but it also provides a classification of watertypes per pixel. We intend to apply this method using two different underlying optical models (SAMBUCA and HYDROPT) and to apply this method to MERIS FR images of the Dutch Wadden Sea. Results will be presented of the study of the effectivity of these approaches for this extreme case-2 area.


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