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SECOR 1 was a small geodetic satellite used to precisely determine points on the earth. It was launched from the WSMC as a joint venture of the US Army and Navy to locate Pacific islands. Experiments with these led to Timation, and finally to the GPS Navstar system.

Alternate Names

  • EGRS 1
  • 00729
  • SECOR1

Facts in Brief

Launch Date: 1964-01-11
Launch Vehicle: Thor Augmented Delta-Agena D
Launch Site: Vandenberg AFB, United States
Mass: 18 kg

Funding Agencies

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