北斗三号高精度载波相位差分定位算法OA北大核心CSTPCD

In light of the insufficiency in the relevant research on the full constellation and multi-frequency differential positioning of the Beidou-3 System(BDS-3),this paper establishes a carrier phase differential positioning model based on multi-frequency observations and validates the algorithm by utilizing the measured data from the continuous operational reference station(CORS)network and the real vehicle-mounted dynamic data.The results indicate that in the static positioning mode,the B1CB2a combination among the dual-frequency combinations demonstrates the best positioning accuracy.Compared with B1CB2a,the three-frequency combination B1CB2aB3I has enhanced the positioning accuracy in the N,E,and U directions by 16%to 41%,2%to 62%,and 7%to 47%,respectively,in the static positioning mode.In the dynamic positioning mode,the three-frequency combination B1CB2aB3I has increased the positioning accuracy in the N,E,and U directions by 53%to 61%,52%to 75%,and 51%to 53%,respectively.B1CB2a,B1CB2aB3I can achieve centimeter-level and sub-decimeter-level positioning accuracy and fast and accurate fixing of ambiguity in static and dynamic positioning modes,significantly improving the performance and reliability of the positioning system.They have broad application prospects in smart transportation,drone navigation,and precision agriculture.