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astronautix.com Intelsat 3

Intelsat 3
Intelsat 3 -

Credit: Intelsat. 27,660 bytes. 259 x 335 pixels.



Class: Communications. Nation: International. Agency: ITSO . Manufacturer: TRW.

Intelsat 3 spacecraft were used to relay commercial global telecommunications including live TV. Three of the 8 satellites in the series (F1, F5, F8) were unusable due to launch vehicle failures, and most of the remainder did not achieve their desired lifetimes. F2 operated for 1.5 years, F3 was partially operational for 7 years, F4 lasted 3 years, F6 survived 2 years, and F7 remained usable for 16 years. Spacecraft: Spin stabilised with a despun antenna structure (34 inch tall antenna). Hydrazine propulsion system with 4 thrusters and 4 tanks. Passive thermal control. Body mounted solar cells produced 178 W peak, 9 AHr NiCd batteries. Payload: Two transponders using 12 watt TWTA amplifiers. Multiple access.1500 voice circuits or 4 TV channels.


Specification

Design Life: 5 years. Total Length: 1.4 m. Maximum Diameter: 1.0 m. Total Mass: 287 kg.


Intelsat 3 Chronology


19 September 1968 Intelsat-3 F-1 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. FAILURE: Control system failure; destroyed by range safety. Mass: 293 kg.
19 December 1968 Intelsat 3 F-2 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 293 kg. Perigee: 35,984 km. Apogee: 37,111 km. Inclination: 15.1 deg.

Over Brazil. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


06 February 1969 Intelsat 3 F-3 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 293 kg. Perigee: 35,762 km. Apogee: 35,785 km. Inclination: 6.5 deg.

Stationed at 63 deg E. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


22 May 1969 Intelsat 3 F-4 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 293 kg. Perigee: 35,226 km. Apogee: 35,671 km. Inclination: 1.2 deg.

Stationed at 174 deg E. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


26 July 1969 Intelsat 3 F-5 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. FAILURE: Third stage failure; left in unusable orbit. Mass: 269 kg. Perigee: 211 km. Apogee: 433 km. Inclination: 30.2 deg.

Third stage failure; left in unusable orbit. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


15 January 1970 Intelsat 3 F-6 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 293 kg. Perigee: 35,782 km. Apogee: 35,791 km. Inclination: 0.4 deg.

Stationed at 336 deg E. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


23 April 1970 Intelsat 3 F-7 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 293 kg. Perigee: 35,772 km. Apogee: 35,802 km. Inclination: 0.2 deg.

Stationed at 341 deg E. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).


23 July 1970 Intelsat 3 F-8 Program: Intelsat. Launch Site: Cape Canaveral . Launch Vehicle: Delta M. Mass: 270 kg. Perigee: 33,849 km. Apogee: 36,628 km. Inclination: 14.1 deg.

Unusable orbit. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C).



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Last update 12 March 2001.
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© Mark Wade, 2001 .