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The US Army's SCORE (Signal Communication by Orbiting RElay) satellite was an 80-ft long, 10-ft diam Atlas missile used as a platform for the communications relay experiment. The spacecraft body served as antennae. This satellite was to demonstrate the feasibility of, and explore problems associated with, operation of a satellite communication system. It carried messages on a tape recorder which was used at one point to carry a Christmas greeting from President Eisenhower. The performance was nominal with experiment operation for 12 days, planned orbit lifetime 20 days, actual orbit lifetime 35 days. The tracking beacon operated at 108 MHz.

Alternate Names

  • 00010
  • Sig Comm by Orbit Relay
  • 1958 Zeta 1

Facts in Brief

Launch Date: 1958-12-18
Launch Vehicle: Atlas
Launch Site: Cape Canaveral, United States
Mass: 3980 kg

Funding Agency

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


  • Communications
  • Engineering

Additional Information

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

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