page_title: GPS satellite blocks
section_title: Block IIF series
hierarchical_section_title: GPS satellite blocks / Block II satellites / Block IIF series
caption_attribution_description: Navstar-2F satellite of the Global Positioning System (GPS)
context_page_description: A GPS satellite is a satellite used by the NAVSTAR Global Positioning System. The first satellite in the system, Navstar 1, was launched on February 22, 1978. The GPS satellite constellation is operated by the 2d Space Operations Squadron of Space Delta 8 of the United States Space Force.
  The GPS satellites circle the Earth at an altitude of about 20,000 km and complete two full orbits every day.
context_section_description: The Block IIF series are "follow-on" satellites developed by Boeing. The satellite has a mass of 1,630 kilograms (3,600 lb) and a design life of 12 years. The first Block IIF space vehicle was launched in May 2010 on a Delta IV rocket. The twelfth and final IIF launch was February 5, 2016.
caption: Artist's impression of a Navstar-2F satellite in orbit.
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