Engineering:EchoStar IV
From HandWiki
Short description: Communications satellite
| Mission type | Communications |
|---|---|
| Operator | EchoStar |
| COSPAR ID | 1998-028A |
| SATCAT no. | 25331 |
| Mission duration | 12 years |
| Spacecraft properties | |
| Bus | A2100AX |
| Manufacturer | Lockheed Martin |
| Launch mass | 3,478 kg (7,668 lb) |
| Dry mass | 1,400 kg (3,100 lb) |
| Power | 10 kW |
| Start of mission | |
| Launch date | May 7, 1998, 23:45 UTC |
| Rocket | Proton-K/Blok-DM3 |
| Launch site | Baikonur 81/23 |
| End of mission | |
| Deactivated | July 2011 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 77° west[1] |
| Semi-major axis | 42,538.0 kilometers (26,431.9 mi)[1] |
| Perigee altitude | 36,085.2 kilometers (22,422.3 mi)[1] |
| Apogee altitude | 36,250.7 kilometers (22,525.1 mi)[1] |
| Inclination | 7.0 degrees[1] |
| Period | 1,455.3 minutes[1] |
| Epoch | May 14, 2017[1] |
| Transponders | |
| Band | 32 Ku band |
| Frequency | Uplink: 17.3 - 17.8 GHz Downlink: 12.2 - 12.7 GHz |
| Bandwidth | 24 MHz |
| Coverage area | United States, Mexico and Puerto Rico |
| EIRP | 53 dBW |
EchoStar IV is a communications satellite operated by EchoStar. Launched in 1998 it was operated in geostationary orbit at a longitude of 77 degrees west for 12 years.
Satellite
The launch of EchoStar IV made use of a Proton rocket flying from Site 81 at the Baikonur Cosmodrome, Kazakhstan. The launch took place at 23:45 UTC on May 7, 1998, with the spacecraft entering a geosynchronous transfer orbit. EchoStar IV carried 32 Ku band transponders to provide direct voice and video communications to small dishes in North America after parking over 119° W or 148° W longitude.[2]
Specifications
- Launch mass: 3,478 kilograms (7,668 lb)
- Power: 2 deployable solar arrays, batteries
- Stabilization: 3-axis
- Propulsion: LEROS-1C
- Longitude: 77° west
See also
- 1998 in spaceflight
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 N2yo. "ECHOSTAR 4". https://www.n2yo.com/satellite/?s=25331/. Retrieved November 28, 2017.
- ↑ "EchoStar 4". SatBeams. http://www.satbeams.com/satellites?id=25331. Retrieved September 28, 2017.
 |  |
