Gnss, Gps, Gps Tracking System, Signal Processing.
if you would like to see the code for generating the interesting animations! Reference [1] http://web.stanford.edu/~gracegao/publications//magazine//InsideGNSS%20Compass%2007.pdf [2] https://en.wikipedia.org/wiki/BeiDou [3] http://www.atlantarf.com/Downloads.php [4]