EO·Atlas
HY-2C Radar Altimeter
Compiled from public sources on 2026-06-16. Not independently verified by China Academy of Space Technology.
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Dual-frequency Ku/C-band radar altimeter flown on HY-2C.
HY-2C Radar Altimeter is a dual-frequency active radar altimeter in the HY-2C microwave payload suite, flown on HY-2C, also known as Hai Yang 2C.[1][2][3] It operates at Ku-band 13.58 GHz and C-band 5.25 GHz.[1][3] The component supports sea-surface-height and ocean-dynamics observation within the HY-2 series mission objective.[2] Its pulse-limited footprint is 2 km, with nadir ranging measurement accuracy of 2 cm.[3] Host-satellite context includes a 957.583 km average height and a 1336 km drifting-orbit altitude; these are mission-level values, not altimeter component measurements.[2][1] Radar altimetry is demonstrated on HY-2C, with ALT active from December 2020 and expected end of life at or after 2026.[1]
Compositional position
- [1]HY-2C satellite, National Satellite Ocean Application Serviceagency doc2026-06-16
- [2]AVISO+ mission page: HY-2Cagency doc2026-06-16
- [3]WMO OSCAR satellite record: HY-2Cagency doc2026-06-16