【作者】 邵沛涵； 高成发； 金俭俭； 朋子涵；

【Author】 SHAO Peihan;GAO Chengfa;JIN Jianjian;PENG Zihan;School of Transportation, Southeast University;

【机构】 东南大学；

【摘要】 近年来,全球各大系统的建设逐渐完善,多系统融合定位亦成为研究的热点。多系统融合定位充分利用了观测到的卫星,能够提高定位的精度和可靠性。载波相对定位是GNSS高精度定位中一项常见的定位技术,常规的基线解算模型是在各个系统内选择各自的参考卫星进行组合定位,即松组合模型,但该模型无法实现不同系统的深度融合。为提高卫星数据利用率,本文采用紧组合模型,对GPS/BDS组合定位进行精度分析。同时我国北斗三号已经完成基本系统建设,北斗三号系统相对于北斗二号系统在卫星空间结构上有着很大的改进,技术更先进,定位精度更高。因此,本文对北斗三号卫星在组合定位中对精度的提升也进行了详细的实验分析。结果表明,相比常规的单点定位模型,紧组合模型能有效提升定位的精度和可靠性,尤其当某系统卫星数量较少时,仍能使之参与解算。同时表明增加使用北斗三号卫星能够增强卫星空间几何结构、提高定位精度,BDS-3系统相对于BDS-2系统定位精度提高明显。更多还原

【Abstract】 In recent years, the construction of major systems around the world has gradually improved, and the integration of multiple systems has become a research hotspot. Multi-system fusion positioning makes full use of the observed satellites, which can improve the accuracy and reliability of positioning. Carrier relative positioning is a common positioning technology in GNSS high-precision positioning. The conventional baseline solution model selects the respective reference satellites in each system for combined positioning, that is, the loose combination model, but the model cannot achieve the depth of different systems. Fusion. In order to improve the utilization of satellite data, this paper uses a tight combination model to analyze the accuracy of GPS/BDS combined positioning. At the same time, China’s BDS-3 has completed the basic system construction. The BDS-3 system has a great improvement in the satellite space structure compared to the BDS-2 system, with more advanced technology and higher positioning accuracy. Therefore, this paper also carried out detailed experimental analysis on the accuracy improvement of the BDS-3 satellite in the combined positioning. The results show that compared with the conventional single-point positioning model, the tight combination model can effectively improve the accuracy and reliability of positioning, especially when the number of satellites in a system is small, it can still participate in the solution. At the same time, it shows that the use of BDS-3 satellite can enhance the satellite space geometry and improve the positioning accuracy. The positioning accuracy of the BDS-3 system is significantly improved compared to the BDS-2 system.更多还原