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02/05/2000 President Clinton announces US army to allow public use of GPS

7:42

Why The US Military Made GPS Free-To-Use

8:06

Top 10 Places You Can't See on Google Maps

The Global Positioning System is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force. On May 2nd, selective availability was discontinued as a result of the 1996 executive order, allowing civilian users to receive a non-degraded signal globally.
    • Essentials 

    • History 

    • Basic concept of GPS 

    • Structure 

    • Applications 

    • Communication 

    • Navigation equations 

    • Error sources and analysis 

    • Accuracy enhancement and surveying 

    • Regulatory spectrum issues concerning GPS receivers 

    • Other systems