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Navstar 54



Navstar 54, also known as USA 177 and as GPS 2R-11 is an American navigational satellite in the GPS fleet. It was launched by a Delta 2 rocket from Cape Canaveral at 17:39 UT on 20 March 2004. It will take Slot 3 in Plane C, replacing the aging GPS 2A-19. The fleet consists of 24 operational satellites (plus a few spares) located in six (inertial) planes with four slots in each.

Alternate Names

  • 28190
  • GPS 2R-11
  • Navstar54
  • USA 177

Facts in Brief

Launch Date: 2004-03-20
Launch Vehicle: Delta II
Launch Site: Cape Canaveral, United States

Funding Agency

  • Unknown (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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