EchoStar IV
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 (1998-05-07UTC23:45Z) UTC |
Rocket | Proton-K/Blok-DM3 |
Launch site | Baikonur 81/23 |
End of mission | |
Deactivated | July 2011 (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
References
- ^ a b c d e f g N2yo. "ECHOSTAR 4". Retrieved November 28, 2017.
{{cite web}}
: CS1 maint: numeric names: authors list (link) - ^ "EchoStar 4". SatBeams. Retrieved September 28, 2017.
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