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HY-2D 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 radar altimeter flown on HY-2D.

HY-2D Radar Altimeter is a dual-frequency active radar altimeter in the HY-2D microwave payload suite, flown on HY-2D, also known as Hai Yang 2D.^[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 microwave mission objective.^[2]^[4] Its pulse-limited footprint is 2 km, with nadir ranging measurement accuracy of 2 cm.^[3] Radar altimetry is demonstrated on HY-2D, with ALT active from May 2021 and expected end of life at or after 2026.^[1]

Where this fits, supply chain

Compositional position

HY-2D ——— this payload

Sources

[1]HY-2D satellite, National Satellite Ocean Application Serviceagency doc2026-06-16
[2]HY-2D satellite launch news, National Satellite Ocean Application Serviceoperator press2026-06-16
[3]AVISO+ mission page: HY-2Dagency doc2026-06-16
[4]WMO OSCAR satellite record: HY-2Dagency doc2026-06-16

Cite https://eo-atlas.org/products/component/hy-2d-alt Markdown twin → Field definitions →