Launch of a Delta D withIntelsat I | |
| Function | Expendable launch system |
|---|---|
| Country of origin | United States |
| Launch history | |
| Status | Retired |
| Launch sites | Cape CanaveralLC-17 |
| Total launches | 2 |
| Success(es) | 2 |
| First flight | 19 August 1964 |
| Last flight | 6 April 1965 |
TheDelta D,Thrust Augmented Delta orThor-Delta D was an Americanexpendable launch system used to launch twocommunications satellites in 1964 and 1965. It was derived from theDelta C, and was a member of theDelta family of rockets.
The three-stage core vehicle was essentially the same as the Delta C. The first stage was aThor missile in theDSV-2A configuration, and the second stage was theDelta-D, which was derived from the earlierDelta-A. AnAltair-2 SRM was used as a third stage. The main difference between the Delta C and Delta D was the presence of threeCastor-1solid rocket boosters, clustered around the first stage.
Both Delta D launches were conducted fromCape Canaveral Air Force StationLaunch Complex 17A. The first, on 19 August 1964, carriedSyncom 3, the first satellite in ageostationary orbit. The last, on 6 April 1965, carried the first commercial communications satellite,Intelsat I.[1][2]
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