BDS??GPS??GLONASS???????????λ?????

???????????????????BDS????GPS??GLONASS????????????????????????????????GNSS???????????λ????????????????????Visual C????++??????д???????λ?????????BDS/GPS/GLONASS??????ж?λ?????????????????????????????????ó????????λ?????????????????

RESEARCH ON SPATIO TEMPORA UNIFICATION OF BDS/GPS/GLONASS MULTI-MODE FUSION NAVIGATION AND POSITIONING

Time system and coordinate system are the reference datum for navigation and positioning, any form of navigation and positioning are carried out within a certain amount of time and coordinate frame. This paper detailed study spatio tempora unification among Beidou Satellite Navigation System ??BDS??, GPS and GLONASS, introduces the time frame and coordinate frame of the three navigation systems. Gives spatio tempora unification conversion model and parameters. On the basis of the theory, puts forward the spatio tempora unification method in practical application of multimode navigation and positioning. Based on the Visual C????++?? platform write multi??mode combinations positioning program, calculate and analyze BDS/GPS/GLONASS three system receiver data, experimental results show that, multi??mode fusion positioning have better accuracy and reliability. Verify the correctness and feasibility of spatio tempora unification transformation thought and method in practical application.