BDS-2/BDS-3与GPS融合的非差实时动态定位算法研究

Research on BDS-2/BDS-3 and GPS fusion undifferenced real-time kinematic algorithm

针对BDS-2、BDS-3、GPS系统间融合以及单系统RTK定位性能分析不足的问题,该文研究了BDS与GPS融合的非差RTK算法,基于短基线BDS-2/BDS-3/GPS融合数据开展了静态和动态实验,分析评估了单系统和多系统融合非差RTK定位精度。实验结果表明,在静态模式下,融入BDS-3卫星后,BDS-2单系统定位精度得到明显提升,E、N、U各方向分别提升26.63%、25.84%、29.59%,GPS单系统和GPS+BDS-2组合系统在高程方向分别提升28.77%和31.14%;在动态模式下,融入BDS-3卫星后,BDS-2单系统平面相对距离的精度提升31.28%,GPS单系统和GPS+BDS-2组合系统分别提升7.1%和19.82%。7种组合模式下,GPS+BDS-2+BDS-3三系统组合的静态和动态定位精度均最佳。

According to the problem of insufficient analysis of BDS-2,BDS-3,GPS inter-system fusion and single-system RTK positioning performance,the undifferenced RTK algorithm of BDS and GPS fusion was studied in this paper.Based on the short baseline BDS-2/BDS-3/GPS fusion data,static and dynamic experiments were carried out to analyze and evaluate the positioning accuracy of undifferenced RTK single system and multi-system fusion.Experiment results showed that in the static mode,after the BDS-3 satellite was integrated,the positioning accuracy of the BDS-2 single system was significantly improved,and the three directions of E,N and U were increased by 26.63%,25.84%and 29.59%respectively.The GPS single system and the GPS+BDS-2 combined system were increased by 28.77%and 31.14%respectively in the elevation direction.In the dynamic mode,after integrating BDS-3 satellite,the accuracy of the plane relative distance of BDS-2 single system was increased by 31.28%,GPS single system and GPS+BDS-2 combined system were increased by 7.1%and 19.82%respectively.Under the seven combination modes,the GPS+BDS-2+BDS-3 three-system combination had the best positioning accuracy in both static mode and dynamic mode.