EO·Atlas
China Ocean Colour and Temperature Scanner
Compiled from public sources on 2026-06-15. Not independently verified by China Academy of Space Technology.
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Ocean-colour and temperature scanner flown on HY-1D.
The China Ocean Colour and Temperature Scanner (COCTS) is a spaceborne passive optical radiometer covering 10 spectral bands from 402 nm to 12,500 nm, providing simultaneous ocean-colour and sea-surface temperature measurements.[1] Ground sampling distance is approximately 1,100 m.[1] COCTS has flown on HY-1A, HY-1B, HY-1C, and HY-1D.[1]
Swath coverage has increased across mission generations. On HY-1A the swath was 1,400 km.[2] HY-1B achieved approximately 2,800 km through an extended scan geometry.[3] On HY-1C and HY-1D the swath reached approximately 2,900 km.[1]
The band configuration has a minor difference between HY-1C and HY-1D. Band 7 spans 730-770 nm (40 nm bandwidth) on HY-1C, and 734-754 nm (20 nm bandwidth) on HY-1D;[4][5] all other bands are nominally identical across the two satellites. The instrument is demonstrated for ocean-colour water-leaving radiance retrieval and sea-surface temperature retrieval.[1]
Compositional position
- Ocean colour / water-leaving radiancevia HY-1D
HY-1D COCTS is the ocean-colour scanner payload listed for the operational HY-1D mission.
- Sea-surface temperature retrievalvia HY-1D
COCTS is recorded as an ocean colour and temperature scanner on HY-1D.
None on record.
- [1]WMO OSCAR instrument record: COCTScommunity2026-06-15
- [2]HY-1A mission overview, eoPortalcommunity2026-06-15
- [3]HY-1B mission overview, eoPortalcommunity2026-06-15
- [4]HY-1C/1D mission overview, eoPortalcommunity2026-06-15
- [5]A new development journey of Ocean colour Satellites, NSOASoperator press2026-06-15
- [6]WMO OSCAR satellite record: HY-1Ccommunity2026-06-15