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  2. The GPS project was started by the U.S. Department of Defense in 1973, with the first prototype spacecraft launched in 1978 and the full constellation of 24 satellites operational in 1993. Originally limited to use by the United States military, civilian use was allowed from the 1980s following an executive order from President Ronald Reagan.

    en.wikipedia.org/wiki/Global_Positioning_System
    In 1973, the idea of a Global Positioning System, initially dubbed NAVSTAR, was developed by the United States Department of Defense. Originally, the technology was intended solely for military personnel and transportation units to obtain their location.
    illumin.usc.edu/the-evolution-of-gps/
     
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  4. 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 …

  5. 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 ...

  6. 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 …

  7. Positioning system - Wikipedia

  8. GPS History: The Evolution of Global Positioning

  9. NASA Brings Accuracy to World’s Global Positioning Systems

  10. The History of the Global Positioning System

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

  12. Global Positioning System summary | Britannica

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

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

  15. What Is GPS & How do Global Positioning Systems Work? | Geotab