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Echostar 3

Also called DBSC 1, S2741


Designation 25004 / 97059A
Launch date 4 Oct 1997
Country of origin United States
Mission Telecommunications
Geostationary orbit 61.5°W
Launch vehicle Atlas 2AS #110

This satellite was originaly ordered by DBSC (Direct Broadcast Satellite Corporation) which merged with a subsidiary of Echostar in late 1995. The merger was approved by the FCC in August 1996.

Echostar is only authorized to operate 11 transponders from 61.5°W but was granted in Mar 1998 a special authorization to use the full frequency space at that location.

In May 1999, Dominion Video Satellite, Inc. leased 8 transponders from this satellite and Echostar subleased 6 transponders back to propose additional channels.

Went inclined in Oct 2014.

In Jul 2017, the satellite moved to 86.8°W but right afterwards an anomaly occured and satellite contact was lost.

End of life

Out of service Jul 2017
Cause contact lost, then regained and sent to Junk orbit

External resources

sat-index articles

Technical data

Lyngsat transponder loading

EIRP coverage (dBW)


Prime contractor LM Astro Space
Platform A2100AX
Mass at launch 3675 kg
Mass in orbit 1700 kg
Dry mass 1325 kg
Solar array 25 m span
Stabilization 3-axis
DC power BOL: 10000 W
Design lifetime 13.5 years

1 receive and 2 transmit antennas.
TT&C: 12.201, 12.203 & 12.699 GHz ; 17.3015 GHz uplink


Main transponders 32
Backup transponders 12
Power 120 W
Bandwidth 24 MHz
Coverage & EIRP max Eastern part of CONUS: 53 dBW
Polarization circular
Frequencies uplink: 17.3-17.8 GHz
downlink: 12.2-12.7 GHz

Ku-band DBS US frequency chart

Was to operate in double power mode (16 transponders at 240 W) but this feature is not usable because of overheating problems.

In Oct 1998 Echostar announced they had lost 4 TWTAs on this satellite, it is expected that more transponders could fail. There is a risk that such failures are not covered by insurance. In early 2002 the number of failed transponders raised to 12.

As of Jun 2003, 14 transponders have failed.

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