Geostationary Ocean Color Imager II (GOCI-II)

Geostationary Ocean Color Imager II is a passive optical geostationary ocean-colour multispectral imager mounted on GEO-KOMPSAT-2B.^[1][2] It has 13 bands, 250 m local-area spatial resolution and 2500 km x 2500 km local-area coverage.^[1][2] The primary listed bands span 380-865 nm, with a wide 483 nm channel for image navigation and registration; spectral coverage is also summarized as 380-900 nm.^[1][2] GOCI-II supports hourly local-area imaging during the daylight UTC window and daily full-disk coverage, with 10 daily Korean Peninsula observations described for the mission payload.^[1][3] Its demonstrated use includes ocean-colour water-leaving radiance retrieval on GEO-KOMPSAT-2B.^[1] Application areas include ocean colour, chlorophyll, CDOM, turbidity and suspended sediment, red and green algae, oil pollution and fisheries-environment monitoring.^[1][3] The geostationary viewing geometry is the main differentiator for buyers needing intraday coastal-water dynamics rather than global polar-orbit revisit.