User Requirements and Development Status of the Next Geostationary Ocean Color Imager, GOCI-II

Abstract

Geostationary Ocean Color Imager (GOCI), the first Earth observation instrument in geostationary orbit, is successfully launched and operated from 2010. The necessity of the next generation satellite is gradually increasing into the international ocean color remote sensing users as well as domestic users in Korea. As a successor of GOCI, development of GOCI-II has been started in 2012 with a scheduled launch in 2019. The mission and user requirements of GOCI-II are defined by Korea Institute of Ocean Science and Technology (KIOST) and international GOCI PI (Principal Investigators). GOCI-II will be operated in same orbital location, at 128.2 degrees Eastern Longitude in geostationary orbit, with GOCI. The GSD (Ground Sample Distance) 250m spatial resolution at nadir and the spectral bands are 12 bands from visible to NIR (370~885nm). Additional 4 spectral bands are added to improve the accuracy of data products such as chlorophyll concentration, total suspended sediments, dissolved organic matters, enhancement of atmospheric correction, and to have a novel capability such as PFT (Phytoplankton Functional Type) which enables to discriminate harmful algae bloom. Newly implemented panchromatic band with 402~885nm bandwidth is expected to enable star imaging for the geometric correction of GOCI-II images. GOCI-II will perform 10 LA observations per day, it fully contain the current GOCI image acquisition schedule (8 ttional ocean color remote sensing users as well as domestic users in Korea. As a successor of GOCI, development of GOCI-II has been started in 2012 with a scheduled launch in 2019. The mission and user requirements of GOCI-II are defined by Korea Institute of Ocean Science and Technology (KIOST) and international GOCI PI (Principal Investigators). GOCI-II will be operated in same orbital location, at 128.2 degrees Eastern Longitude in geostationary orbit, with GOCI. The GSD (Ground Sample Distance) 250m spatial resolution at nadir and the spectral bands are 12 bands from visible to NIR (370~885nm). Additional 4 spectral bands are added to improve the accuracy of data products such as chlorophyll concentration, total suspended sediments, dissolved organic matters, enhancement of atmospheric correction, and to have a novel capability such as PFT (Phytoplankton Functional Type) which enables to discriminate harmful algae bloom. Newly implemented panchromatic band with 402~885nm bandwidth is expected to enable star imaging for the geometric correction of GOCI-II images. GOCI-II will perform 10 LA observations per day, it fully contain the current GOCI image acquisition schedule (8 t