The Ocean Color 2 (OC2), Ocean Color 3 (OC3) and Dall'Olmo three-band (TBDO) algorithms used for the estimation of the chlorophyll-a concentration [Chl-a] have been calibrated and validated for Sentinel-2 spectral bands. Measurements of in situ chlorophyll-a, radiometry and simulations with HydroLight have been used for this purpose within the ESAQS Project. The results show that Sentinel-2 spectral bands are suitable for studying the chlorophyll-a concentration in inland waters. The OC3 and TBDO algorithms have been applied to Sentinel-2 images and satisfactory results have been obtained in different reservoirs of Valencia region (Spain).
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