The Space Systems/Loral (SSL)-built EchoStar VIII was scheduled for launch late last week despite concerns about solar array degradation on sister satellites.
EchoStar VIII was due to be launched aboard a Proton K booster from Baikonur on an International Launch Services mission on 20 August. However, the launch was delayed due to high-altitude winds. It had previously been delayed from 22 June due to a fault in a command receiver on the spacecraft.
Solar degradation has hit the SSL-built EchoStar V and VI satellites, says the communications satellite operator.
EchoStar V lost a second solar array string last month, bringing the number remaining to 94 - two more than the number required to assure full power availability for a 12-year design life.
Echostar VI lost a second string this month, bringing to 110 those remaining in operation, four more than required for full power availability for a 12-year design life.
"There can be no assurance that future anomalies will not cause further losses which could impact commercial operations," says EchoStar. Several other SS/L-built satellites have experienced similar malfunctions.
Source: Flight International