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Syncom
Part of HS 301 Family
Syncom
Syncom
Credit: NASA
American communications technology satellite. Experimental telecommunications satellite. Communication satellite built by Hughes for NASA, USA. Launched 1963 - 1964. Used the HS-301 bus.

Status: Operational 1963. First Launch: 1963-02-14. Last Launch: 1964-08-19. Number: 3 . Gross mass: 39 kg (85 lb).


More at: Syncom.

Family: Communications technology sat, Geosynchronous orbit, Technology. Country: USA. Engines: Star 13D. Launch Vehicles: Thor, Delta, Thor Delta B, Thor Delta D. Launch Sites: Cape Canaveral, Cape Canaveral LC17B, Cape Canaveral LC17A. Agency: NASA. Bibliography: 2, 279, 4135, 4136, 4137, 4138, 4139, 4140, 4141, 4142, 4143, 4144, 4145, 4146, 4147, 4148, 4149, 6, 6964, 13245.
Photo Gallery

Syncom I; Syncom 1Syncom I; Syncom 1
Credit: Manufacturer Image


STS-41-DSTS-41-D
Deployment of the Syncom IV (Leasat-2) satellite
Credit: NASA


STS-41-DSTS-41-D
View of the Syncom IV satellite in orbit over the earth
Credit: NASA


STS-51-ASTS-51-A
Syncom IV-1 satellite leaving Discovery's payload bay
Credit: NASA


STS-51-DSTS-51-D
End effector of the Discovery's RMS with tools moves toward Syncom-IV
Credit: NASA


STS-51-DSTS-51-D
Syncom-IV (LEASAT) satellite
Credit: NASA


STS-51-ISTS-51-I
Astronaut James van Hoften on RMS tracking Syncom IV-3 after deployment
Credit: NASA


STS-51-ISTS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA


STS-51-ISTS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA


STS-51-ISTS-51-I
Astronaut James van Hoften working with Syncom IV-3 satellite
Credit: NASA


STS-32STS-32
SYNCOM IV-5 satellite drifts over cloud-covered Earth after STS-32 deployment
Credit: NASA



1962 February 14 - . LV Family: Thor.
  • NASA's Syncom I (Synchronous Communications) satellite was placed in orbit by a Thor/Delta launch vehicle. - . Spacecraft Bus: HS 301. Spacecraft: Syncom. During firing of the apogee kick motor, contact was lost with the satellite. Syncom was a NASA project supported by DoD ground stations and communications experiments..

1963 February 14 - . 05:35 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17B. LV Family: Thor. Launch Vehicle: Thor Delta B.
  • Syncom I; Syncom 1 - . Payload: Syncom 1. Mass: 39 kg (85 lb). Nation: USA. Agency: NASA Greenbelt. Class: Technology. Type: Communications technology satellite. Spacecraft Bus: HS 301. Spacecraft: Syncom. Completed Operations Date: 1963-02-14 . USAF Sat Cat: 553 . COSPAR: 1963-004A. Apogee: 36,739 km (22,828 mi). Perigee: 34,392 km (21,370 mi). Inclination: 33.3000 deg. Period: 1,425.50 min.

    Experimental commsat; lost contact following orbital injection. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Four score. Last known longitude (10 March 1987) 172.58 deg E drifting at 2.429 deg E per day.


1963 July 26 - . 14:33 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Thor. Launch Vehicle: Thor Delta B.
  • Syncom 2 - . Mass: 39 kg (85 lb). Nation: USA. Agency: NASA Greenbelt. Class: Technology. Type: Communications technology satellite. Spacecraft Bus: HS 301. Spacecraft: Syncom. Completed Operations Date: 1969-04-01 . USAF Sat Cat: 634 . COSPAR: 1963-031A. Apogee: 35,891 km (22,301 mi). Perigee: 35,891 km (22,301 mi). Inclination: 32.7000 deg. Period: 1,441.50 min.

    NASA's Syncom II synchronous communications satellite was placed in orbit by a Thor/Delta launched from Cape Canaveral. Experimental commsat; 1st geosynchronous satellite. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit at 55 deg W in 1963; 26 deg W in 1965. Last known longitude (19 July 1995) 68.47 deg E drifting at 0.089 deg W per day.


1964 August 19 - . 12:15 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Thor. Launch Vehicle: Thor Delta D.
  • Syncom 3 - . Payload: Syncom C. Mass: 39 kg (85 lb). Nation: USA. Agency: NASA Greenbelt. Class: Technology. Type: Communications technology satellite. Spacecraft Bus: HS 301. Spacecraft: Syncom. Completed Operations Date: 1974-12-29 . USAF Sat Cat: 858 . COSPAR: 1964-047A. Apogee: 35,792 km (22,240 mi). Perigee: 35,784 km (22,235 mi). Inclination: 0.1000 deg. Period: 1,436.20 min.

    NASA's Syncom III synchronous communi- cations satellite was launched into orbit by a Thrust Augmented Thor/Delta (TAD) launch vehicle in its first use as a space booster. By the end of August, Experimental commsat; carried Star Flash experiment. Spacecraft engaged in practical applications and uses of space technology such as weather or communication (US Cat C). Positioned in geosynchronous orbit at 64 deg W in 1964; 180 deg E in 1964; 25 deg W in 1965; 165 deg E in 1966-1969. Last known longitude (6 December 1974) 6.08 deg W drifting at 0.188 deg W per day.


1964 Sep - .
  • The Defense Department began military communications experiments between Saigon, Republic of South Vietnam, and Hawaii using the Syncom II synchronous communications satellite. - . Spacecraft Bus: HS 301. Spacecraft: Syncom. These Saigon-Hawaii experiments further extended the Defense Department's usage of Syncom II that had begun several months earlier..

1965 January 1 - .
  • NASA transferred the operation of Syncom II and Syncom III synchronous communications satellites to the Defense Department which had provided the communications ground stations for the program. - . Spacecraft Bus: HS 301. Spacecraft: Syncom.

1965 July 8 - .
  • The transfer of Syncom II and III from NASA to the Defense Department was completed. - . Spacecraft Bus: HS 301. Spacecraft: Syncom.

    The Defense Communications Agency (DCA) directed their use, but the Air Force Satellite Control (AFSCF) and its operating locations in the Pacific and Indian Oceans maintained precise control and positioning of the two synchronous communications satellites. The Army and Navy were responsible for the ground communications facilities that were used with the Syncom satellites.



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