Eutelsat I F-3
| Names | ECS-3 European Communications Satellite-3 Eutelsat 3 |
|---|---|
| Mission type | Communications |
| Operator | ESA / Eutelsat |
| Website | https://www.eutelsat.com/en/home.html |
| Mission duration | 7 years (planned) Failed to orbit |
| Spacecraft properties | |
| Spacecraft | ECS-3 |
| Spacecraft type | ECS |
| Bus | ECS-Bus |
| Manufacturer | British Aerospace |
| Launch mass | 1,158 kg (2,553 lb) |
| Dry mass | 500 kg (1,100 lb) |
| Dimensions | 1.9 m x 1.4 m x 2.3 m Span on orbit: 13.8 m |
| Power | 1 kW |
| Start of mission | |
| Launch date | 12 September 1985, 23:26:00 UTC |
| Rocket | Ariane 3 (V15) |
| Launch site | Centre Spatial Guyanais, ELA-1 |
| Contractor | Arianespace |
| Entered service | Failed to orbit |
| Orbital parameters | |
| Reference system | Geocentric orbit (planned) |
| Regime | Geostationary orbit |
| Longitude | 10° East |
| Transponders | |
| Band | 12 Ku-band |
| Bandwidth | 72 MHz |
| Coverage area | Europe, the Middle East and Africa |
Eutelsat I F-3, also known as European Communications Satellite 3 (ECS-3) is a decommissioned communications satellite operated by the European Telecommunications Satellite Organisation (Eutelsat). Launched in 1985, it was operated in geostationary orbit at a longitude of 10° East. It was the third of five satellites launched to form the first-generation Eutelsat constellation.