French
DeutschIntelsat III F-1
| Mission type | Communications |
|---|---|
| Operator | Intelsat |
| COSPAR ID | INT3F-1 |
| Mission duration | 5 years planned Failed to orbit |
| Spacecraft properties | |
| Spacecraft type | Intelsat III |
| Manufacturer | TRW |
| Launch mass | 293 kilograms (646 lb) |
| Power | 183 watts |
| Start of mission | |
| Launch date | September 19, 1968, 00:09:00 UTC[1] |
| Rocket | Delta M |
| Launch site | Cape Canaveral LC-17A |
| Contractor | NASA |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geosynchronous |
| Epoch | Planned |
Intelsat III | |
Intelsat III F-1 was a communications satellite intended to be operated by Intelsat. Launched towards geostationary orbit in 1968 it failed to achieve orbit.
Design
[edit]
The first of eight Intelsat III satellites to be launched, Intelsat III F-1 was built by TRW. It was a 293-kilogram (646 lb) spacecraft equipped with two transponders to be powered by body-mounted solar cells generating 183 watts of power.[2] It had a design life of five years and carried an SVM-2 apogee motor for propulsion.[3]
Launch
[edit]Intelsat III F-1 was launched on the maiden flight of the Delta M rocket, flying from Launch Complex 17A at the Cape Canaveral Air Force Station. The launch took place at 00:09:00 UTC on September 19, 1968, with the spacecraft bound for a geosynchronous transfer orbit.[1]
It was to go in operation above the Atlantic Ocean in time to relay broadcasts of the next month's Olympics in Mexico City.[4][5][6]
Twenty seconds after liftoff a fault became apparent in the gyroscope used to monitor the rate at which the rocket pitched over. Control of the rocket was subsequently lost, with it beginning to disintegrate around 102 seconds into the flight.[7] At 108 seconds after launch the rocket was destroyed by range safety.[8]
See also
[edit]
References
[edit]- ^ a b McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved February 9, 2014.
- ^ Wade, Mark. "Intelsat 3". Encyclopedia Astronautica. Archived from the original on February 23, 2002. Retrieved February 9, 2014.
- ^ Krebs, Gunter. "Intelsat-3". Gunter's Space Page. Retrieved February 9, 2014.
- ^ "Rocket explodes after launch; new satellite lost". St. Petersburg Times. (Florida). UPI. September 19, 1968. p. 11A.
- ^ "Blast ends orbit try for satellite". Spokesman-Review. (Spokane, Washington). Associated Press. September 19, 1968. p. 1.
- ^ "Rocket explodes after launch; new satellite lost". The St. Petersburg Times (Florida). UPI. September 19, 1968. p. 11A.
- ^ Kyle, Ed. "Long Tank Thor-Delta". Space Launch Report. Retrieved February 9, 2014.
- ^ Kyle, Ed. "Thor-Based Space Launch History". Space Launch Report. Retrieved February 9, 2014.
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