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The investigation possibilities of usage remote sensing techniques for water quality monitoring of Vistula Lagoon have been made since 2006. All research studies, presented in the article, have been done under three international projects: SWANLAKE (ESA Project Category-1 LBR), MONTRANSAT (INTERREG project co-financed from European Regional Development Fund within the framework Neighbourhood Programme Lithuania, Poland and Kaliningrad Region of Russian Federation) and VISLA (project co-financed within the frame Norway Grants). All presented in article analysis based on the six cloudless superspectral satellite images of CHRIS/PROBA (in “Water” mode, 18 spectral bands) acquired in 2007–2009. CHRIS/ PROBA images were processed according to successive steps: radiometric correction, atmospheric correction, geometric registration, water quality parameters extraction. CHRIS/PROBA satellite data was made using ATCOR 2/3 model – version 6.4.2. Water quality parameters were extracted using empirical and statistical relationships between CHRIS measured spectral reflectance and in situ measurements (regression based): Secchi disc depth (R2=0.75), suspended solids (R2=0.88), chlorophyll-a (R2=0.73). Results presented in article for Vistula Lagoon test site, shows the real possibilities of CHRIS satellite data usage for near real time determination of various water quality parameters like water transparency, total suspended solids, chlorophyll-a concentration.
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