Intelsat IVA
| Intelsat IVA F-1 | |
|---|---|
|
|
| Start date | September 26, 1975 |
| Launcher | Atlas Centaur 307 |
| Launch site | Canaveral LC-36B |
| Takeoff mass | 1515 kg |
| Mass in orbit | 595 kg |
| Manufacturer | Hughes |
| model | HS-353 |
| lifespan | 7 years |
| operator | Intelsat |
| Playback information | |
| Transponder | 20 C-band |
| Others | |
| Electrical power | 600 W |
| position | |
| drive | SVM-4A with hydrazine |
| List of geostationary satellites | |
The satellites of the Intelsat IVA and Intelsat 4A series are television satellites of the International Telecommunications Satellite Consortium ( Intelsat ) based in Luxembourg . They were developed and built by the Hughes Aircraft Company based on the Intelsat IV series .
Intelsat IVA F-1
The first of six satellites was launched on September 26, 1975 with an Atlas SLV-3D Centaur-D1AR rocket from Cape Canaveral , Florida . The intended service life was seven years. The spin-stabilized satellites had a cylindrical shape, 2.38 m in diameter and 2.8 m in length, which were equipped on the outside with 17,000 solar cells for the energy supply. With the antennas that did not turn, they were about 7 m high and could transmit two television transmissions or 7250 telephone calls at the same time through the 20 transponders (16 spot and 4 wide-angle). Thanks to the improved antennas compared to the Intelsat IV generation and 20 instead of 12 transponders, the transmission capacity has almost been doubled.
Intelsat IVA F-5 and F-6
Of the six satellites, the fourth (with the designation F-5) was lost due to a leak in the engine's gas generator during take-off. The sixth satellite weighed 826 kg when launched, only about half the mass of the other satellites.
See also
Web links
- NASA: Chronology of Intelsat Development and Operations, 1969–1978 .
- Gunter's Spage Page: Intelsat-4A
Individual evidence
- ↑ NASA JPL: Intelsat 4A Quicklook ( Memento from January 16, 2017 in the Internet Archive )
- ↑ Boeing: Factsheet Intelsat IVA ( Memento from January 2, 2009 in the Internet Archive )