Science
SENTINEL-1A
C-band SAR Imaging · ESA
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The first Copernicus satellite proved that free, open Earth observation data changes everything. Sentinel-1A's SAR imagery — delivered freely to anyone within hours — enables applications from mapping Arctic sea ice to detecting illegal fishing to measuring ground subsidence above European subway tunnels. Its open data policy is called the most transformative decision in Earth observation history.
Its orbit
- Orbit
- Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
- Altitude
- 433–434 mi (697–699 km)
- Inclination
- 98.2°
- One orbit
- 98.6 minutes14.6 orbits a day
- NORAD ID
- 39634
- Int’l designator
- 2014-016A
- Launched
- 2014
Orbital elements from CelesTrak, as of 22 Sep 2026.
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- SENTINEL-2CMultispectral Land Monitoring
- SENTINEL-3AOcean / Land Monitor