NEXT SPACEFLIGHT

Status

Success

EchoStar 4

Launch Time
Thu May 07, 1998 23:45 UTC

Rocket

Proton-K/Block DM-3
ILS
Status: Retired
Liftoff Thrust: 9,548 kN
Payload to LEO: 19,000 kg
Payload to GTO: 2,500 kg
Stages: 4
Strap-ons: 0
Rocket Height: 57.64 m
Fairing Diameter: 4.35 m
Fairing Height: 10.4 m

Mission Details

EchoStar 4

Echsostar 4 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 experienced anomalies in connection with solar panel deployment (two of five panels on one solar array have not unfolded). Therefore several transponders are not operational, so EchoStar 4 did not replace EchoStar 1. In Jul 1999 further anomalies with thermal control and fuel systems were reported. Only 16 transponders are reported to be operational. EchoStar has filed for the total loss of the satellite, which was insured for $220 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 license of MCI to EchoStar. During May 1999, EchoStar IV experienced anomalies affecting transponders, heating systems, and the fuel system. In July 1999, additional fuel system anomalies were confirmed. By 31 October 2000, a total of 26 transponders of 44 aboard failed, and by 30 June 2002, 38 transponders had failed. Only six transponders were available for use at this time. Currently the satellite functions as an in-orbit spare. In September 2004, the jammed solar array deployed spontaneously.

Payloads: 1
Total Mass: 3,478.0 kg
Geostationary Transfer Orbit

Location

Site 81/23, Baikonur Cosmodrome, Kazakhstan

Stats

1998

29th orbital launch attempt

Proton-K

252nd mission
3rd mission of 1998
220th successful mission
3rd consecutive successful mission