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  2. The history of GPS can be summarized as follows:
    1. 1973: The U.S. Department of Defense started the GPS project.
    2. 1978: The first prototype spacecraft was launched.
    3. 1993: The full constellation of 24 satellites became operational.
    4. Civilian use: Initially limited by broadcasting Selective Availability (SA)1.
    5. Origins: GPS dates back to the Cold War and the space race2.
    6. 1973: The Defense Department combined competing satellite navigation systems to create the NAVSTAR Global Positioning System (GPS)3.
    Learn more:
    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 origins of GPS dates back to the Cold War when the Soviet Union launched the Sputnik I satellite, heralding the beginning of the space race. What started off as a method of studying the Earth from space quickly grew into a universal technology utilized by nearly every country in the world.
    www.geotab.com/blog/gps-satellites/
    In 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 synchronized time from space, provided by onboard atomic clocks.
    timeandnavigation.si.edu/satellite-navigation/gps
     
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  4. WEBMay 18, 2018 · Learn how GPS evolved from the idea of tracking satellites to the system we use today. See the key dates and events that shaped GPS history from 1957 to 2001.

     
  5. WEBJan 11, 2018 · Learn how GPS, the system that allows you to figure out your location on the planet, was inspired by the Space Race and developed by the U.S. military. Explore the origins of Transit, …

  6. 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 …

  7. WEBJul 20, 2020 · Learn from the four fathers of GPS, who received the 2019 Queen Elizabeth Prize for Engineering, about their role in the invention and implementation of the technology. The IEEE History Center …

  8. 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 …

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