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SECOR 6 (SEquential COllation of Range) was a US Army/USAF spacecraft launched from Vandenberg AFB aboard an Atlas Agena-D rocket. This small geodetic satellite was used to precisely determine points on the earth. Experiments with these led to Timation, and finally to the GPS Navstar system.

Alternate Names

  • EGRS 6
  • 02205
  • SECOR6

Facts in Brief

Launch Date: 1966-06-09
Launch Vehicle: Atlas-Agena D
Launch Site: Vandenberg AFB, United States
Mass: 17 kg

Funding Agencies

  • Department of Defense-Department of the Army (United States)
  • Department of Defense-Department of the Air Force (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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