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Ocean Observation Satellite


Introducing the Geostationary Ocean Color Imager


GOCI, Geostationary Ocean Color Imager

GOCI is an oceanic payload among the three observers of the Communication, Ocean and Meteorological (COMS), the world's first geostationary orbit satellite.

The Korea Ocean Satellite Center of the Korea Institute of Ocean Science & Technology, which is a major organization of GOCI, provides marine environment information in real time by using the GOCI data.


Item Geostationary Ocean Color Imager (GOCI)
Development/Operation This satellite was developed by the Korea Aerospace Research Institute and the ASTRIUM (present AIRBUS), a French company, and mainly operated by the Korea Ocean Satellite Center of the Korea Institute of Ocean Science & Technology
Launching Date 2010-06-27
Orbit Altitude 35,786 km, 128.2ºE
Performance Period Aug. 2010 ─ Mar. 2011 (initial test operation)
Apr. 2011 ─ Mar. 2018 (7 years for regular mission)
1st extension: Apr. 2018 ─ Mar. 2020
2nd extension: Apr. 2020 ─ Mar. 2021
Spatial Resolution 500m
Temporal Resolution 1 hour (8 times/day, 0 UTC ─ 7 UTC)
Band 8 bands (6 bands for visible light, 2 bands for near-infrared ray)
Spectral Range 412 ~ 865nm
Imaging Area Regional 2,500 km X 2,500 km (Center coordinate 130°E, 36°N)
Imaging Slot 16 slots (Total 5,685 X 5,567 Pixels)
Products 13 types
(Remote sensing reflectance, chlorophyll concentration, total suspended solids concentration, absorption by dissolved organic matter, diffuse attenuation coefficient for downward irradiance, Secchi depth, marine primary productivity, red tide, surface layer current, aerosol optical depth, aerosol type (yellow sand), terrestrial vegetation index, and enhanced vegetation index)

Slot Image Order

Spectral response function