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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 Space Force and operated by Mission Delta 31. [ 3 ] [ 4 ] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the ...

  3. 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 by the United States Air Force on 22 February 1978. [1]

  4. Positioning system - Wikipedia

    en.wikipedia.org/wiki/Positioning_system

    Hybrid positioning systems are systems for finding the location of a mobile device using several different positioning technologies. Usually GPS (Global Positioning System) is one major component of such systems, combined with cell tower signals, wireless internet signals, Bluetooth sensors, IP addresses and network environment data. [17]

  5. 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 22 January 2025, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are in reserve or testing, 43 are retired, 2 were lost during launch, and 1 prototype was never launched. 3 Block III satellites have completed ...

  6. GPS Block III - Wikipedia

    en.wikipedia.org/wiki/GPS_Block_III

    The United States' Global Positioning System (GPS) reached Full Operational Capability on 17 July 1995, [9] completing its original design goals. Advances in technology and new demands on the existing system led to the effort to modernize the GPS system. In 2000, the U.S. Congress authorized the effort, referred to as GPS III.

  7. USA-128 - Wikipedia

    en.wikipedia.org/wiki/USA-128

    Global Positioning System (GPS) was developed by the U.S. Department of Defense to provide all-weather round-the-clock navigation capabilities for military ground, sea, and air forces. Since its implementation, GPS has also become an integral asset in numerous civilian applications and industries around the globe, including recreational used (e ...

  8. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    GPS signals are broadcast by Global Positioning System satellites to enable satellite navigation.Using these signals, receivers on or near the Earth's surface can determine Position, Velocity and Time (PVT) of the receiver.

  9. GPS week number rollover - Wikipedia

    en.wikipedia.org/wiki/GPS_week_number_rollover

    The Global Positioning System (GPS) broadcasts a date, including a week number counter that is stored in only ten binary digits, whose range is therefore 0–1,023. After 1,023, an integer overflow causes the internal value to roll over, changing to zero again. Software that is not coded to anticipate the rollover to zero may stop working or ...