Geostationary Ocean Color Imager (GOCI), pronounced ‘gɔƟi‘, is the world’s first geostationary orbit satellite image sensor in order to observe or monitor an ocean-color around the Korean Peninsula [1][2]. The spatial resolution of GOCI is about 500m and the range of target area is about 2,500km×2,500km centered on Korean Peninsula. GOCI was loaded on Communication, Ocean, and Meteorological Satellite (COMS) of South Korea which was launched in June, 2010. It will be operated by Korea Ocean Satellite Center](KOSC) at  Korea Institute of Ocean Science & Technology](KIOST), and capture the images of ocean-color around the Korean Peninsula 8 times a day for 7.7 years.