Analysis of positioning performance of BDS-3 multi-frequency combination RTK
In order to solve the user's application problems caused by the lack of understanding of the posi-tioning performance of BDS-3 single system multi-frequency and GNSS multi-system multi-frequency combination,based on the measured data of the Beidou satellite navigation and positioning reference station system in Shaanxi Province,this paper compares and analyzes the accuracy,convergence time and fixation rate of network RTK positioning under the combination of BDS-3 single system multi-frequency and GNSS multi-system multi-frequency combination,and studies the impact of the addition of new frequency points B1c and B2a in BDS-3 on positioning performance.The results show that in the open environment,the positioning accuracy of the BDS-3 single system is similar to that of BDS+GPS dual system and BDS+GPS+GLONASS three systems,and all meet the needs of centimeter-level high-precision positioning services.The addition of BDS-3 new frequency points has improved the positioning accuracy to some extent,and the elevation direction is more obvious;In occluded environment,the positioning timeliness of BDS-3 new frequency points needs to be improved,and the performance of multi-constellation multi-frequency points combination is better;From 12:00 pm-16:00 pm the ionospheric activity is intense,and the fixed rate did not increase after the addition of the new frequency BDS-3.
NETL
NSTL
万方数据
维普
