EchoStar IV
Mission typeCommunications
OperatorEchoStar
COSPAR ID1998-028A
SATCAT no.25331
Mission duration12 years
Spacecraft properties
BusA2100AX
ManufacturerLockheed Martin
Launch mass3,478 kg (7,668 lb)
Dry mass1,400 kg (3,100 lb)
Power10 kW
Start of mission
Launch dateMay 7, 1998, 23:45 (1998-05-07UTC23:45Z) UTC
RocketProton-K/Blok-DM3
Launch siteBaikonur 81/23
End of mission
DeactivatedJuly 2011 (July 2011)
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Longitude77° west[1]
Semi-major axis42,538.0 kilometers (26,431.9 mi)[1]
Perigee altitude36,085.2 kilometers (22,422.3 mi)[1]
Apogee altitude36,250.7 kilometers (22,525.1 mi)[1]
Inclination7.0 degrees[1]
Period1,455.3 minutes[1]
EpochMay 14, 2017[1]
Transponders
Band32 Ku band
FrequencyUplink: 17.3 - 17.8 GHz
Downlink: 12.2 - 12.7 GHz
Bandwidth24 MHz
Coverage areaUnited States, Mexico and Puerto Rico
EIRP53 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

See also

References

  1. 1 2 3 4 5 6 7 N2yo. "ECHOSTAR 4". Retrieved November 28, 2017.{{cite web}}: CS1 maint: numeric names: authors list (link)
  2. ↑ "EchoStar 4". SatBeams. Retrieved September 28, 2017.


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