Syncom 1, 2 and 3 Syncom

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1 syncom 1, 2 , 3

1.1 common features
1.2 syncom 1
1.3 syncom 2
1.4 syncom 3





syncom 1, 2 , 3

first generation syncom satellite.


common features

the 3 syncom satellites experimental spacecraft built hughes aircraft company s facility in culver city, california, team led harold rosen, don williams, , thomas hudspeth. 3 satellites cylindrical in shape, diameter of 71 centimeters (28 in) , height of 39 centimeters (15 in). pre-launch fueled masses 68 kilograms (150 lb), , orbital masses 39 kilograms (86 lb) 25-kilogram (55 lb) payload. capable of emitting signals on 2 transponders @ 2 w. thus, syncom satellites capable of carrying single two-way telephone conversation, or 16 teletype connections. of 25 june 2009, 3 satellites still in orbit, although no longer functioning.


syncom 1

syncom 1 intended first geosynchronous communications satellite. launched on february 14, 1963 delta b #16 launch vehicle cape canaveral, lost on way geosynchronous orbit due electronics failure. seconds after apogee kick motor circularizing orbit fired, spacecraft fell silent. later telescopic observations verified satellite in orbit period of 24 hours @ 33° inclination.


syncom 2

syncom 2 first geosynchronous communications satellite. orbit inclined rather geostationary. satellite launched nasa on july 26, 1963 delta b #20 launch vehicle cape canaveral. satellite kept station @ altitude calculated herman potočnik noordung in 1920s.


during first year of syncom 2 operations, nasa conducted voice, teletype, , facsimile tests, 110 public demonstrations show capabilities of satellite , invite feedback. in august 1963, president john f. kennedy in washington, d.c., telephoned nigerian prime minister abubakar tafawa balewa aboard usns kingsport docked in lagos harbor; first live two-way call between heads of government satellite. kingsport acted control station , uplink station.


syncom 2 relayed number of test television transmissions fort dix, new jersey ground station in andover, maine, beginning on september 29, 1963. although low-quality video no audio, first successful television transmission through geosynchronous satellite.


syncom 3

syncom 3 first geostationary communication satellite, launched on august 19, 1964 delta d #25 launch vehicle cape canaveral. satellite, in orbit near international date line, had addition of wideband channel television , used telecast 1964 summer olympics in tokyo united states. although syncom 3 credited first television program cross pacific ocean, relay 1 satellite first broadcast television united states japan on november 22, 1963.


turned off in 1969, syncom 3 remains in geosynchronous orbit of december 2012. in 40 years has drifted 8 degrees west, longitude 172.








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