Analytical Study of the Propagation of GPS Constellation

Today’s scenario is more demanding on the accuracy of position or location so that without wasting time people will reach their place. The current work on the propagation of the Global Positioning System constellation and their prognosis of the service availability necessitates repeating the procedure carried out by each receiver to determine the location of the received source. The information from the ALMANAC is used to calculate the constellation's satellites’ positions in an Earth-cantered, Earth-fixed system. The appropriate relations are derived from literature with the help of MATLAB software. Neglect higher-order adjustments offered by ephemerides for initial approximation. This paper also discusses the Geometric Dilution of the Precision curve for various periods of the day to evaluate the accuracy of our Global Positioning System.