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registry / constellations / Sentinel-1 (part of ESA Copernicus (fleet))

Sentinel-1 / eo constellation

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sarEuropean Unionoperational

Sentinel-1 is Europe's radar Earth observation mission, providing an all-weather, day-and-night supply of imagery of Earth's surface using an advanced radar instrument. The Copernicus Sentinel-1 mission is designed as a two-satellite constellation to support land and ocean monitoring and emergency response.

(source, as of 2026-07-05)

key details

max resolution //5 mas of 2026-07-09
revisit //repeat cycle of 12 days per satellite; six days with both satellites operatingas of 2026-07-09
spectral bands //C-bandas of 2026-07-09

generations

Sentinel-1 Next GenerationESA awarded Thales Alenia Space the contract to lead development and build of two Copernicus Sentinel-1 Next Generation satellites, delivering a fourfold improvement in geometric resolution (5 m x 5 m versus 5 m x 20 m today) with coverage extended to the polar regions. (source, as of 2026-07-13)

faq

Who operates Sentinel-1?

Sentinel-1 is operated by European Space Agency (ESA). (source, as of 2026-07-05)

How many Sentinel-1 satellites are active on orbit?

CelesTrak's catalog currently tracks 4 objects for Sentinel-1. (source, as of 2026-09-08)

When did Sentinel-1 first launch?

Sentinel-1 first launched on 2014-04-03. (source, as of 2026-07-05)