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HY 2C, 2D


HY 2 (Haiyang = Ocean) is a chinese series of Earth observation satellites focused on the marine dynamic environment.

The objective of the second batch of HY-2 satellites is to monitor the dynamic ocean environment with microwave sensors to detect sea surface wind field, sea surface height and sea surface temperature. The instrument suit consists of an altimeter (dual-frequency in Ku and C-bands), and a scatterometer.

These satellites are modified versions of the earlier HY 2A and 2B spacecraft. These satellites omit the microwave radiometer imager and feature two solar arrays.

HY 2C was launched in September 2020 on a CZ-4B launch vehicle from the Jiuquan Satellite Launch Center.

HY 2D followed in May 2021 also on a CZ-4B launch vehicle from the Jiuquan Satellite Launch Center.

Nation: China
Type / Application: Oceanography
Operator: CAST
Equipment: dual-frequency altimeter (Ku and C-bands), microwave imager
Power: 2 deployable solar arrays, batteries
Mass: 1575 kg (#2C)
Satellite COSPAR Date LS Launch Vehicle Remarks
HY 2C 2020-066A 21.09.2020 Jq LC-43/94 CZ-4B
HY 2D 2021-043A 19.05.2021 Jq LC-43/94 CZ-4B


  • CAST Website

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