| Mission type | Communications |
|---|---|
| Operator | EchoStar |
| COSPAR ID | 1998-028A |
| SATCATno. | 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 (1998-05-07UTC23:45Z) UTC |
| Rocket | Proton-K/Blok-DM3 |
| Launch site | Baikonur81/23 |
| End of mission | |
| Deactivated | July 2011 (2011-07) |
| 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 | 32Ku band |
| Frequency | Uplink: 17.3 - 17.8GHz Downlink: 12.2 - 12.7 GHz |
| Bandwidth | 24MHz |
| Coverage area | United States,Mexico andPuerto Rico |
| EIRP | 53 dBW |
EchoStar IV is acommunications satellite operated byEchoStar. Launched in 1998 it was operated ingeostationary orbit at a longitude of 77 degrees west for 12 years.
The launch of EchoStar IV made use of aProton rocket flying fromSite 81 at theBaikonur Cosmodrome,Kazakhstan. The launch took place at 23:45 UTC on May 7, 1998, with the spacecraft entering ageosynchronous transfer orbit. EchoStar IV carried 32Ku bandtransponders to provide direct voice and videocommunications to small dishes inNorth America after parking over 119° W or 148° W longitude.[2]
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