Assessment of the Potential future high and medium resolution sensors on geosynchronous orbit for coastal zone monitoring

Geosynchronous satellite can measure any area with high temporal repetitivity within its coverage region because of its relative static location compared to Earth. Considering the temporal repetitivity, it can satisfy requirements for coastal zone monitoring but also has to face the influence of the varying solar angle and sensor angle (zenith and azimuth). Up to now, there is no geosynchronous sensor dedicated to ocean color monitoring (a geosynchronous sensor "Korea Geostationary Ocean Color Imager" (KGOCI) is supposed to be launched in 2009). To obtain radiances from the ocean at 36000 km of altitude, we have to use a simulation model. In this conference, we present generic model of simulation of geosynchronous optical sensor. This model is composed of different models: a water bio-optical model, an atmospheric transfer model and a sensor model. We also present our recent results, that is the influence of solar angle and sensor angle on deviation of estimation of chlorophyll concentration in open ocean (case1 water).