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2. Global Positioning System - Wikipedia

   en.wikipedia.org/wiki/Global_Positioning_System

   The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near ...

3. Satellite navigation - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation

   A satellite navigation or satnav system is a system that uses satellites to provide autonomous geopositioning. A satellite navigation system with global coverage is termed global navigation satellite system ( GNSS ). As of 2024, four global systems are operational: the United States 's Global Positioning System (GPS), Russia 's Global ...

4. List of GPS satellites - Wikipedia

   en.wikipedia.org/wiki/List_of_GPS_satellites

   Samples of three GPS satellites' orbits over a five-year period (2013 to 2018) USA-242 · USA-239 · USA-151 · Earth As of 15 August 2023, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 4 are unhealthy or in reserve, 41 are retired, 2 were lost during launch, and 1 prototype was never launched. 4 Block III satellites have completed ...

5. Galileo (satellite navigation) - Wikipedia

   en.wikipedia.org/wiki/Galileo_(satellite_navigation)

   The first two Galileo In-Orbit Validation satellites were launched by Soyuz ST-B flown from Centre Spatial Guyanais on 21 October 2011, [ 63 ] and the remaining two on 12 October 2012. [ 64 ] As of 2017, the satellites are fully useful for precise positioning and geodesy with a limited usability in navigation.

6. GPS satellite blocks - Wikipedia

   en.wikipedia.org/wiki/GPS_satellite_blocks

   GPS satellite blocks are the various production generations of the Global Positioning System (GPS) used for satellite navigation. The first satellite in the system, Navstar 1, was launched on 22 February 1978. [1] The GPS satellite constellation is operated by the 2nd Space Operations Squadron (2SOPS) of Space Delta 8, United States Space Force .

7. GPS signals - Wikipedia

   en.wikipedia.org/wiki/GPS_signals

   GPS signals are broadcast by Global Positioning System satellites to enable satellite navigation. Receivers on or near the Earth's surface can determine location, time, and velocity using this information. The GPS satellite constellation is operated by the 2nd Space Operations Squadron (2SOPS) of Space Delta 8, United States Space Force .