NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Navstar 71



GPS-2F (Global Positioning System) or Navstar-2F (Navigation System using Timing And Ranging) satellites are the fourth evolution stage of the second generation of the GPS satellites. Improvements included an extended design life of 12 years, faster processors with more memory, and a new civil signal on a third frequency.

The GPS-2F satellites do not need to carry an apogee kick motor, in contrast to the earlier generations, as the launch vehicles provide direct insertion into the GPS orbit. Originally the Delta-4M version was to be used for the Delta launches, but a mass growth of the satellites required a switch to the more powerful Delta-4M+(4,2) version. For Atlas launches, the Atlas-5(401) version is used.

Alternate Names

  • 40105
  • Navstar71
  • USA 256

Facts in Brief

Launch Date: 2014-08-02
Launch Vehicle: Atlas V
Launch Site: Cape Canaveral, United States
Mass: 1630 kg

Funding Agency

  • United States Air Force Academy (United States)


  • Navigation/Global Positioning

Additional Information

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

[] NASA Logo -