missions

HY-1D

HY-1D (Hai Yang 1D) is the fourth HY-1 series ocean observation satellite operated by NSOAS. It was launched on 2020-06-11 from Taiyuan (NSOAS operator report; WMO OSCAR records 2020-06-10 UTC). HY-1D flies in a sun-synchronous orbit at approximately 798 km altitude with a 13:30 ascending equator crossing. WMO OSCAR records HY-1D as operational as of its last update.^[1]^[2]

HY-1D carries five payloads: the Chinese Ocean Colour and Temperature Scanner (COCTS) for ocean colour and sea-surface temperature; the Coastal Zone Imager (CZI) for high-resolution coastal observation; the Ultraviolet Imager (UVI) for atmospheric correction support; a Spectral Calibration Spectrometer (SCS) for on-orbit spectral calibration; and an Automatic Identification System (AIS) receiver for vessel tracking.^[2]

Data are distributed by NSOAS and support global ocean colour, sea-surface temperature, coastal zone monitoring, and maritime domain awareness.^[1]

Full specification

All fields

current status	operational
operator	National Satellite Ocean Application Service
launch vehicle	casc-long-march-2c
Launched	2020-06-11
orbit type	Sun-synchronous orbit, approximately 798 km altitude, 13:30 ascending equator crossing
tasking supported	false
current geographic priority	Global ocean and coastal-zone observations
Last updated	2026-06-14
claim status	agency-sourced

Where this fits, supply chain

Compositional position

this ——— China Ocean Colour and Temperature Scanner payload

this ——— Coastal Zone Imager payload

this ——— HY Ultraviolet Imaging and Calibration Sensor payload

this ——— HY Satellite Calibration Spectrometer payload

this ——— HY-1D Automatic Identification System payload

Ocean colour / water-leaving radiance → demonstrated China Ocean Colour and Temperature Scanner

Sea-surface temperature retrieval → demonstrated China Ocean Colour and Temperature Scanner

Optical time-series change detection → capable Coastal Zone Imager

Ocean colour / water-leaving radiance → capable pending review Coastal Zone Imager

Vegetation index mapping → capable Coastal Zone Imager

Ocean colour / water-leaving radiance → demonstrated HY Ultraviolet Imaging and Calibration Sensor

Cross-sensor harmonization and calibration transfer → demonstrated HY Ultraviolet Imaging and Calibration Sensor

Sources

[1]A new development journey of Ocean colour Satellitesoperator press2026-06-14
[2]WMO OSCAR satellite record: HY-1Dcommunity2026-06-14

Cite https://eo-atlas.org/missions/hy-1d Markdown twin → Field definitions →