Research On GPS/BDS Carrier Phase Dynamic Differential Location Method

With the global system construction of Beidou satellite system,the modernization of GPS,the restart of GLONASS system and the accelerated development of Galileo system,multi frequency,multi system and high precision satellite navigation and positioning have become the focus of the study.In this paper,the theory of GPS/BDS carrier phase differential positioning is studied deeply,and the theory and algorithm are verified by the program.The GPS and BDS need to be unified in the same time frame,then the gross errors and cycle slip detection,get clean data,using the improved LAMBDA method to fixed widelane ambiguity,and then through the wide lane ambiguity fixed original fuzzy degree,improve the success rate of ambiguity fixing,then the total least square method were parameter estimation,get the final location parameter.Based on the above data processing theory,this paper implements the GPS/BDS carrier phase dynamic differential positioning algorithm,which is verified by experiments.The results showed in the short baseline calculation,the horizontal positioning accuracy of the GPS and BDS combined systems is better than 3cm,and the elevation positioning accuracy is less than 5cm;positioning accuracy of GPS/BDS positioning is better than that of GPS and BDS system,and the success rate of ambiguity fixing,satellite constellation structure and initial time combination system is superior to the single system.The experimental results verify the effectiveness and availability of GPS/BDS carrier phase dynamic difference.The method can be applied in GPS/BDS receiver and the field of satellite positioning...