Sentinel-3A
Vector drawing of the Sentinel-3 | |||||||||||||||||
| Mission type | Earth observation | ||||||||||||||||
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| Operator | ESA · EUMETSAT | ||||||||||||||||
| COSPAR ID | 2016-011A | ||||||||||||||||
| SATCAT no. | 41335 | ||||||||||||||||
| Website | Sentinel-3 (ESA) | ||||||||||||||||
| Mission duration | Planned: 7 years Elapsed: 9 years, 4 months, 4 days | ||||||||||||||||
| Spacecraft properties | |||||||||||||||||
| Spacecraft type | Sentinel-3 | ||||||||||||||||
| Bus | Prima | ||||||||||||||||
| Manufacturer | Thales Alenia Space | ||||||||||||||||
| Launch mass | 1,250 kg (2,760 lb) | ||||||||||||||||
| Dry mass | 1,150 kg (2,540 lb) | ||||||||||||||||
| Dimensions | 3.9 × 2.2 × 2.2 m (12.8 × 7.2 × 7.2 ft) | ||||||||||||||||
| Power | 2,300 watts | ||||||||||||||||
| Start of mission | |||||||||||||||||
| Launch date | 16 February 2016, 17:57 UTC | ||||||||||||||||
| Rocket | Rokot/Briz-KM | ||||||||||||||||
| Launch site | Plesetsk Cosmodrome, Site 133 | ||||||||||||||||
| Contractor | Eurockot Launch Services | ||||||||||||||||
| Orbital parameters | |||||||||||||||||
| Reference system | Geocentric | ||||||||||||||||
| Regime | Sun-synchronous | ||||||||||||||||
| Semi-major axis | 7,182.47 km (4,462.98 mi) | ||||||||||||||||
| Eccentricity | 0.000309 | ||||||||||||||||
| Perigee altitude | 802.12 km (498.41 mi) | ||||||||||||||||
| Apogee altitude | 806.56 km (501.17 mi) | ||||||||||||||||
| Inclination | 98.62° | ||||||||||||||||
| Period | 100.97 min | ||||||||||||||||
| RAAN | 117.18° | ||||||||||||||||
| Argument of perigee | 86.80° | ||||||||||||||||
| Mean motion | 14.26 rev/day | ||||||||||||||||
| Repeat interval | 27 days | ||||||||||||||||
| Epoch | 17 February 2016, 18:53:04 UTC | ||||||||||||||||
| Transponders | |||||||||||||||||
| Band | S band (TT&C support) X band (science data) | ||||||||||||||||
| Bandwidth | S band: 64 kbit/s uplink, 1 Mbit/s downlink X band: 2 × 280 Mbit/s | ||||||||||||||||
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Sentinel-3A is a European Space Agency Earth observation satellite dedicated to oceanography which launched on 16 February 2016. It was built as a part of the Copernicus Programme, and is the first of four planned Sentinel-3 satellites. Its sister satellite, Sentinel-3B, launched on 25 April 2018. After completing initial commissioning, each satellite was handed over to EUMETSAT for the routine operations phase of the mission. Two recurrent satellites - Sentinel-3C and Sentinel-3D - will follow in approximately 2025 and 2028 respectively to ensure continuity of the Sentinel-3 mission.