Intelsat IV F-5

Intelsat IV F-5
Launch of Intelsat IV F-5.
Mission typeCommunications
OperatorIntelsat
COSPAR ID1972-041A Edit this at Wikidata
SATCAT no.06052
Mission duration7 years (planned)
Spacecraft properties
BusHS-312
ManufacturerHughes Aircraft
Launch mass1,414 kilograms (3,117 lb)
BOL mass730 kilograms (1,610 lb)
Start of mission
Launch dateJune 13, 1972, 21:53:04 (1972-06-13UTC21:53:04Z) UTC[1]
RocketAtlas SLV-3D Centaur-D
Launch siteCape Canaveral LC-36B
Orbital parameters
Reference systemGeocentric[2]
RegimeGeostationary[2]
Eccentricity0.72211[2]
Perigee altitude548 kilometers (341 mi)[2]
Apogee altitude36,570 kilometers (22,720 mi)[2]
Inclination27°[2]
Period651.4 minutes[2]
EpochJune 13, 1972[2]
Transponders
Band12 IEEE C-band
Bandwidth40 MHz
Intelsat IV

Intelsat IV F-5 was a geostationary communication satellite built by Hughes, it was owned by Intelsat. The satellite was based on the HS-312 platform and its estimated useful life was 7 years.

History

The Intelsat IV F-5 was part of the Intelsat IV series which consisted of eight communications satellites, launched from Cape Canaveral during the early 1970s, marked the fifth generation of geostationary communications satellites developed by the Hughes Aircraft Company since 1963 with the launch of Syncom II, the world's first synchronous satellite. The Syncom II was 15 cm high and 28 inches in diameter, weighing 78 pounds in orbit. In contrast, the Intelsat IVs weighed more than £ 1,300 (595 kg) into orbit and were more than 17 feet (5.2 meters) in diameter. All seven satellites exceeded their projected life expectancies and were withdrawn from active duty, the last of which, the Intelsat IV F-1 was retired in October 1987.

The satellite was equipped with 12 C-band transponders. It had 6,000 two-way relay phone calls or broadcast 12 concurrent color television programs or mixed combinations of communications traffic including data and fax.

The satellite had 12 channels of broadband communication. Each channel had a bandwidth of 40 MHz and provided about 500 communication circuits.

Launch

The satellite was successfully launched into space on June 13, 1972, at 21:53:04 UTC, by means of an Atlas SLV-3D Centaur-D vehicle from the Cape Canaveral Air Force Station in Florida, United States. It had a launch mass of 1,414 kg.[3]

See also

References

  1. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved April 21, 2017.
  2. ^ a b c d e f g h NASA, Goddard Space Flight Center. "INTELSAT 4 F-5". NSSDC Master Catalog. Retrieved April 21, 2017.
  3. ^ Krebs, Gunter. Intelsat-4A. Gunter's Space Page. Retrieved 21 April 2017.


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