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United Launch Alliance
Delta IV M+(4,2) | GPS IIF-6 (USA-251)
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Mission brief
The flight at a glance.
GPS IIF (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.
Open the full mission →Published flight sequence
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Planned timings relative to the target. These steps do not indicate live progress.
A flight sequence has not been published for this mission.