missions

HY-2D

HY-2D (Hai Yang 2D) is an operational Chinese ocean-observation satellite operated by the National Satellite Ocean Application Service (NSOAS), launched on 19 May 2021 from Jiuquan. The mission flies in a drifting orbit at approximately 973 km altitude with 66 degree inclination, providing a 10-day repeat cycle for global ocean dynamic environment monitoring.^[1]

The payload stack comprises a radar altimeter (ALT), a microwave scatterometer (HSCAT), a calibration microwave radiometer (CMR), a DORIS receiver for precise orbit determination, and a laser retroreflector array (LRA). HY-2D forms part of China's HY-2 series alongside HY-2B and HY-2C, supporting sea surface height measurement, ocean wind retrieval, and passive microwave sea surface characterisation.^[2]^[3]

Supply chain position

carries instrument HY-2D Radar Altimeter

carries instrument HY Scatterometer

carries instrument HY-2D Calibration Microwave Radiometer

operated by National Satellite Ocean Application Service

launched on Casc Long March 4b

Radar altimetry - sea surface height and inland water levels → demonstrated HY-2D Radar Altimeter

Radar scatterometry → demonstrated HY Scatterometer

Multi-frequency microwave imaging radiometry → demonstrated HY-2D Calibration Microwave Radiometer

Sources

[1]HY-2D satellite launch newsoperator press2026-06-14
[2]WMO OSCAR satellite record: HY-2Dcommunity2026-06-14
[3]AVISO+ mission page: HY-2Dagency doc2026-06-14

Cite https://eo-atlas.org/missions/hy-2d Markdown twin → Field definitions → Suggest a correction →

How to cite this page

Plain text

HY-2D. EO-Atlas, SpectraWorks B.V. https://eo-atlas.org/missions/hy-2d (CC BY 4.0)

BibTeX

@misc{eoatlas:missions:hy-2d,
  title = {HY-2D},
  author = {{EO-Atlas}},
  publisher = {SpectraWorks B.V.},
  note = {CC BY 4.0},
  url = {https://eo-atlas.org/missions/hy-2d}
}