| Names | ECS-4 European Communications Satellite-4 Eutelsat 4 |
|---|---|
| Mission type | Communications |
| Operator | ESA / Eutelsat |
| COSPAR ID | 1987-078B |
| SATCAT no. | 18351 |
| Website | https://www.eutelsat.com/en/home.html |
| Mission duration | 7 years (planned) 15 years (achieved) |
| Spacecraft properties | |
| Spacecraft | ECS-4 |
| Spacecraft type | ECS |
| Bus | ECS-Bus |
| Manufacturer | British Aerospace |
| Launch mass | 1,185 kg (2,612 lb) [1] |
| 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 | 16 September 1987, 00:45:28 UTC[2] |
| Rocket | Ariane 3 (V19) |
| Launch site | Centre Spatial Guyanais, ELA-1 |
| Contractor | Arianespace |
| Entered service | November 1987 |
| End of mission | |
| Disposal | Graveyard orbit |
| Deactivated | November 2002 |
| Orbital parameters | |
| Reference system | Geocentric orbit[3] |
| Regime | Geostationary orbit |
| Longitude | 10° East (1987–1988) 13° East (1988–1990) 7° East (1990–1992) 25.5° East (1993–2000) 33° (2000–2002) [1] |
| Transponders | |
| Band | 12 Ku-band |
| Bandwidth | 72 MHz |
| Coverage area | Europe, the Middle East and Africa |
Eutelsat I F-4, also known as European Communications Satellite-4 (ECS-4) is a decommissioned communications satellite operated by the European Telecommunications Satellite Organisation (Eutelsat). Launched in 1987, it was operated in geostationary orbit at a longitude of 10° East, before moving to several other locations later in its operational life, before it was finally decommissioned in 2002. It was the fourth of five satellites launched to form the first-generation Eutelsat constellation.