Intelsat I

"Early Bird Satellite" redirects here. For the song, see André Brasseur.
Intelsat I F1
INTELSAT I Early Bird
Mission typeCommunications
OperatorCommunications Satellite Corporation (COMSAT)
COSPAR ID1965-028A Edit this at Wikidata
SATCAT no.01317
Mission duration18 months (planned)
4 years and 4 months
Spacecraft properties
BusHS-303
ManufacturerHughes Aircraft
Launch mass149 kg
Power40 watts
Start of mission
Launch dateApril 6, 1965, 23:47:50 UTC
RocketDelta D
Launch siteCape Canaveral, LC-17A
ContractorDouglas Aircraft Company
Entered serviceJune 28, 1965
End of mission
DeactivatedAugust 1969
Orbital parameters
Reference systemGeocentric
RegimeGSO
Perigee altitude35,767.8 kilometres (22,225.1 mi)
Apogee altitude35,855.1 kilometres (22,279.3 mi)
Inclination3.1270°
Period1437 minutes
Revolution no.8068

Intelsat I (nicknamed Early Bird for the proverb "The early bird catches the worm") was the first commercial communications satellite to be placed in geosynchronous orbit, on April 6, 1965.[1][2] It was built by the Space and Communications Group of Hughes Aircraft Company (later Hughes Space and Communications Company, and now Boeing Satellite Systems) for COMSAT, which activated it on June 28, 1965. It was based on the Syncom series of satellites that Hughes had previously built for NASA to demonstrate that communications via synchronous-orbit satellite were feasible. Its booster was a Thrust Augmented Delta (Delta D). After a series of maneuvers, it reached its geosynchronous orbital position over the Atlantic Ocean at 28° West longitude, where it was put into service.[3]

It helped provide the first live TV coverage of a spacecraft splashdown, that of Gemini 6 in December 1965. Originally slated to operate for 18 months, Early Bird was in active service for 4 years and 4 months, being deactivated in January 1969, although it was briefly activated in June of that year to serve the Apollo 11 flight when the Atlantic Intelsat satellite failed. It was deactivated again in August 1969 and has been inactive since that time (except for a brief reactivation in 1990 to commemorate its 25th launch anniversary),[4] although it remains in orbit.

The Early Bird satellite was the first to provide direct and nearly instantaneous contact between Europe and North America, handling television, telephone, and telefacsimile transmissions. It was fairly small, measuring nearly 76 cm × 61 cm (2.5 ft × 2.0 ft) and weighing 34.5 kg (76 lb).

Early Bird was one of the satellites used in the then record-breaking broadcast of Our World.

Model

A full-scale model, or a flight test model, hung in the main lobby of the Intelsat headquarters building, Washington, D.C. before moving to McLean, VA in 2014. It was donated to the National Air and Space Museum in 2022.[5]

See also

References

  1. ^ "Encyclopedia Astronautica - Intesat I". Archived from the original on 16 January 2010. Retrieved 5 April 2010.
  2. ^ "Intelsat: History". Archived from the original on 13 December 2013. Retrieved 13 December 2013.
  3. ^ "Intelsat-1".
  4. ^ "This Week in NASA History — Intelsat I: The 'Early Bird' of Satellites".
  5. ^ "Intelsat Donates 'Early Bird' Intelsat 1 Satellite to the Smithsonian". 23 March 2022.

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