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Transit 1B



Navy Transit 1B was launched into orbit by Thor-Able-Star with navigation payload experiment at Cape Canaveral. It demonstrated the first engine restart in space and the feasiblity of using satellites as navigational aids. Transit spacecraft were developed for updating the inertial navigation systems on board US Navy Polaris submarines, and later for civilian use. The receivers used the known characteristics of the satellites orbit, measured the Doppler shift of the satellites radio signal, and thereby calculated the receivers position on the earth.

Alternate Names

  • 1960 Gamma 2
  • 00031
  • Transit1B

Facts in Brief

Launch Date: 1960-04-13
Launch Vehicle: Thor
Launch Site: Cape Canaveral, United States
Mass: 600 kg

Funding Agency

  • Department of Defense-Department of the Navy (United States)


  • Navigation/Global Positioning

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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