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Echostar 4


Designation 25331 / 98028A
Launch date 7 May 1998
Country of origin United States
Mission Telecommunications
Geostationary orbit see below
Launch vehicle Proton #258


Begin End Position
L: 7 May 1998 end of tests 127°W (mexican DBS slot)
end of tests Jun 1999 148°W
mid Jul 1999 Dec 1999 110°W
Feb 2000 May 2003 119°W
Jul 2003 Oct 2003 157°W
Oct 2003 Jun 2005 157°W, inclined
Jul 2005   77°W, inclined

End of life

Out of service Jul 2011
Cause sent to the junk orbit

The satellite should have replaced Echostar 1 at 119°W which would then have moved to 148°W (where only 24 transponders have been granted to Echostar) After launch, the satellite has experienced anomalies in connection with solar panel deployment (two of five panels on one solar array have not unfolded). Several transponders are not operational. As a result, Echostar 4 did not replace Echostar 1. In Jul 1999 furthen anomalies with the heating and fuel systems were reported. Only 16 transponders are reported still operational.

The satellite was insured for $220 million. Echostar has filled for constructive total loss of the satellite. The FCC licence for 148°W costed $52 million.

In Jun 1999 the FCC approved a move request to 110°W to allow Echostar to start broadcasting from there. Earlier the FCC granted to transfer of the 110°W licence of MCI to Echostar. Echostar is allowed to use channels 1 - 31 (odd) and 2 - 26 (even).

In Jan 2002 Echostar requested authorization to move it to 175°W once Echostar 7 and 8 are operational.

In Mar 2005 Echostar settled the insurance for $240 million and retained the right to use it.

In mid-2005, the satellite moved to 77°W (a Mexican slot) to be leased to QuetzSat, a Mexican company (established by SES Americom Inc adn Grupo Medcom). Only 16 transponders would still be usable.

External resources

sat-index articles

Technical data

Lyngsat transponder loading


Prime contractor LM
Platform A2100AX
Mass at launch 3700 kg
Mass in orbit  
Dry mass 1400 kg
Solar array  
Stabilization 3-axis
DC power  
Design lifetime 15 years

Has a Leros liquid apogee engine
Telemetry and command: 12.2005 GHz, 12.2025 GHz, 12.6985 GHz and 17.308 GHz, with a 300 kHz bandwidth


Main transponders 32
Backup transponders  
Power 120 W
Bandwidth 24 MHz
Coverage & EIRP max CONUS, Alaska, Hawaii: 53 dBW
Polarization circular
Frequencies uplink: 17.3-17.8 GHz
downlink: 12.2-12.7 GHz

Transponders can be dual-combined (16 x 240 W)

Ku-band DBS US frequency chart

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