Simulation And Visualization Realization Of GPS Orbit Based On OpenGL

Global Positioning System possess the capability of three-dimensional navigation and location globally,all-weather and real-time,the precise orbit information is the foundation of navigation and location.In company with technological development,it is inevitable trend that introducing three-dimensional visual graphic technique in satellite monitoring.Exploiting satellite monitoring graphic software with all right interface is significant for advancing satellite monitoring application level,combining with national satellite monitoring technology and the research of institute made in space informatics.The dissertation aims at finding a new solution to satellites' motion equation,and simulating the satellites' three-dimensional motion state.Its purpose is to offer some theoretical investigation for exploiting out nicety,realtime,figure visualized software in spaceflight test.Most work is as follows:1.Discussed several frame of reference concerned with GPS simulation system in detail:time-system,coordinate-system and power model system,which are emulational theory.2.Expatiated clearly on critical technology about OpenGL,mostly researched vein map technology and coordinate transformation technology.3.Analyzed the theory on satellite motion,lucubrated satellite dynamics model,summarized the difference between all kinds of solution and improvement of satellite movement differential eguation.To gaine the satellite position at discretional epoch easily,we choose Collocation integral method,also make simulation for external push orbital precision,which demonstrated the validity and feasibility of this method.4.Designed the structure,function as well as application method of location simulation system program <>,estalished satellite constellation.Realized satellite constellation 3D demo based on OpenGL,look into design method between differ model and concrete realization of program.