![]() Vector drawing of the Sentinel-3 | |||||||||||||||||
Mission type | Earth observation | ||||||||||||||||
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Operator | ESA · EUMETSAT | ||||||||||||||||
COSPAR ID | 2018-039A | ||||||||||||||||
SATCAT no. | 43437 | ||||||||||||||||
Website | Sentinel-3 (ESA) | ||||||||||||||||
Mission duration | Planned: 7 years Elapsed: 6 years, 1 month, 30 days | ||||||||||||||||
Spacecraft properties | |||||||||||||||||
Spacecraft type | Sentinel-3 | ||||||||||||||||
Bus | Prima | ||||||||||||||||
Manufacturer | Thales Alenia Space [1] | ||||||||||||||||
Launch mass | 1,250 kg (2,756 lb) [2] | ||||||||||||||||
Dry mass | 1,150 kg (2,535 lb) [3] | ||||||||||||||||
Dimensions | 3.9 × 2.2 × 2.2 m (12.8 × 7.2 × 7.2 ft) [2] | ||||||||||||||||
Power | 2,300 watts [3] | ||||||||||||||||
Start of mission | |||||||||||||||||
Launch date | 25 April 2018, 17:57:51 UTC [1] | ||||||||||||||||
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 | 7,180.77 km (4,461.92 mi) | ||||||||||||||||
Eccentricity | 0.0001027 | ||||||||||||||||
Perigee altitude | 801.90 km (498.28 mi) | ||||||||||||||||
Apogee altitude | 803.38 km (499.20 mi) | ||||||||||||||||
Inclination | 98.6276° | ||||||||||||||||
Period | 100.93 min | ||||||||||||||||
RAAN | 183.84° | ||||||||||||||||
Argument of perigee | 96.39° | ||||||||||||||||
Mean motion | 14.26 rev/day | ||||||||||||||||
Repeat interval | 27 days [4] | ||||||||||||||||
Epoch | 25 April 2018, 20:50:15 UTC [5] | ||||||||||||||||
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-3B was successfully launched on 25 April 2018 at 17:57 UTC from the Plesetsk Cosmodrome aboard a Rokot launch vehicle. [1]
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