The optical properties of water and its constituents are of decisive importance for the evaluation of satellite remote sensing data. Up to now measuring procedure for seawater absorption were less sensitive and affected by light scattering on particles. The newly at the GKSS developed instrument (PSICAM) is based on the use of an integrating sphere. The PSICAM methods is several times more sensitive than previous methods and makes it possible to precisely determine the light absorption of seawater samples and therewith to determine the amount of different water constituents, like Gelbstoff, suspended matter and algae.
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