The NAVSTAR global positioning system is a satellite-based positioning system implemented and operated by the US Department of Defense (DOD). NAVSTAR stands for Navigation System using Time and Ranging, and it was designed to provide continuous, all-weather navigation and positioning capabilities throughout the world. Work on the system began in 1973 as a result of the merger of the US Navy’s Timaton Program and the US Air Force’s 621B Project. These two programs had been established in the mid-1960s to develop a passive navigation system using measured ranges.


Reference Station Mobile Station Carrier Phase Measurement Clock Bias Navigation Message 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media Dordrecht 1997

Authors and Affiliations

  • R. P. Loweth

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