EchoStar 4

Launch Success

Liftoff Time (GMT)

23:45:00

Thursday May 7, 1998

Mission Details

EchoStar 4

Wiki

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.

Geostationary Transfer Orbit

1 Payload

3,478 kilograms

Rocket

Retired
Proton-K/Block DM-3

Active 1996 to 1999

Khrunichev State Research and Production Space Center logo

Manufacturer

Khrunichev

Rocket

Height: 57.64m

Payload to Orbit

LEO: 19,000 kg

GTO: 2,500 kg

Liftoff Thrust

9,548 Kilonewtons

Fairing

Diameter: 4.35m

Height: 10.4m

Stages

4

Launch Site

Site 81/23

Baikonur Cosmodrome, Kazakhstan

Fastest Turnaround

11 days 23 hours

Stats

Proton-K


252nd

Mission

3rd

Mission of 1998

1998


29th

Orbital launch attempt