Analysis Of GPS Simulation And Program Design Of Simulation Software

Following the development of satellite positioning, there must be more and more constellations constituted by positioning satellites. To study the simulation of satellite positioning in computer, in this paper, the author has studied this theme, and used Visual C++ to develop a program which named GPS-Simulator to simulate GPS. The most important context of this paper is:(1) Analysis of principle of satellite motion, analysis of GPS ephemeris data and observation data, designing of the model which can generate simulated ephemeris data and observation data.(2) Simulating the Galileo system, analyzing the positioning precision of this system and the system which composed with GPS and Galileo.(3) Analysis of structure and function of GPS-Simulator, developing four models of this program, which contain: constellation setting system, graphic display system of constellation, positioning precision analysis system, generation system of simulated data. In paper the detailed design and analysis of these four models has been explained.