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  2. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 and the full constellation of 24 satellites became operational in 1993. Civilian use by the United States military was limited to an average of 100 meter uncertainty in location by broadcasting Selective Availability (SA).
    en.wikipedia.org/wiki/Global_Positioning_System
    The original GPS system began as a project of the U.S. military. The first experimental satellite was launched in 1978. By 1994, a full 24 GPS satellites were orbiting Earth. At first, GPS available for civilian, or nonmilitary, use was not very accurate. It would only locate a GPS receiver within about 300 meters (1,000 feet).
    www.nationalgeographic.org/encyclopedia/gps/
    History of Global Positioning System (GPS) GPS is also known as the Navstar project started in 1973 and became fully operational in 1994. This system is funded and run by the United States Department of Defence. Originally, this system was intended for military purposes only but was made available to public use on completion of the project.
    byjus.com/physics/global-positioning-system-gps/
    The origins of GPS technology date back to World War II, when the U.S. and British navies deployed navigation systems that used ground-based radio signals. But the idea really got off the ground when the Soviet Union launched Sputnik — the world's first artificial satellite — in 1957.
     
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  8. History of the Global Positioning System or GPS

    WEBJan 14, 2020 · GPS, or the Global Positioning System, was invented by the U.S. Department of Defense (D.O.D) and Ivan Getting, and cost taxpayers $12 billion. Eighteen satellites—six in each of three orbital planes …

  9. Learn the History of GPS From Its Founders - IEEE …

    WEBJul 20, 2020 · The four fathers of the Global Positioning System (from left) Richard Schwartz, Bradford Parkinson, James Spilker, Hugo Fruehauf at the 2019 Queen Elizabeth Prize for Engineering award ceremony in ...

  10. Positioning system - Wikipedia

  11. Navigating the history of GPS | Nature Electronics

  12. Global Positioning System (GPS) | Time and Navigation

    WEBIn 1973, the Defense Department combined its competing satellite navigation systems. The new joint program under the Air Force was called the NAVSTAR Global Positioning System, or GPS. It introduced …

  13. Global Positioning System - Wikiwand

    WEBThe Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force.

  14. GPS.gov: GPS Overview - GPS: The Global Positioning System

  15. The Evolution of GPS – USC Viterbi School of Engineering

  16. GPS History: The Evolution of Global Positioning

  17. The History of the Global Positioning System

  18. Global Positioning System summary | Britannica

  19. GPS: What is it and how does it work? | Space

  20. A Brief History of the Development of the Global Positioning System

  21. Global Positioning System History | C-SPAN.org

  22. Global Positioning System (GPS) - How GPS works? | History