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registry / constellations / Sentinel-6 (part of ESA Copernicus (fleet))

Sentinel-6 / eo constellation

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radar-altimeteroperational

Copernicus Sentinel-6 is the next radar altimetry reference mission, extending the legacy of sea-surface height measurements until at least 2030. The mission tracks rising ocean levels caused by climate change, with two satellites in the constellation measuring sea-surface heights across approximately 95% of Earth's oceans.

(source, as of 2026-07-05)

key specs

revisit //repeat ground-track cycle of about 9 days 22 hours; maps 95% of Earth's ice-free ocean every 10 daysas of 2026-07-09
spectral bands //Ku-band, C-bandas of 2026-07-09

faq

Who operates Sentinel-6?

Sentinel-6 is operated by EUMETSAT. (source, as of 2026-07-05)

How many Sentinel-6 satellites are active on orbit?

CelesTrak's catalog currently tracks 2 objects for Sentinel-6. (source, as of 2026-07-11)

When did Sentinel-6 first launch?

Sentinel-6 first launched on 2020-11-21. (source, as of 2026-07-05)