摘要
针对目前BDS-3/BDS-2多频单点定位技术研究较少,本文对单、双、多频伪距单点定位模型进行了简要介绍,并基于抗差理论利用MEGX多站观测数据对BDS-3/BDS-2单、双、多频伪距定位性能进行详细对比分析,实验结果表明:①单频伪距单点定位ENU方向精度为0.631,0.863,4.279 m。双频伪距单点定位ENU方向精度为1.257,1.221,3.097 m。三频伪距单点定位ENU方向精度2.102,2.380,4.612 m;②在电离层延迟误差较大的情况下,双频伪距单点定位能够有效抵抗电离层误差影响,提高U方向定位精度;③由于伪距单点定位误差模型简单,三频消电离层组合模型扩大噪声影响降低定位精度。
At present,there are few studies on the multi-frequency single point positioning technology of BDS-3/BDS-2.Based on the robust theory,MEGX multi-station observation data is used to conduct a detailed comparative analysis on the positioning performance of single-,dual-and multi-frequency pseudo-ranges.The experimental results show that①the accuracy of ENU direction of single-frequency pseudo-range single-point positioning is 0.631,0.863,4.279 m.The accuracy of ENU direction of dual-frequency pseudo-range single-point positioning is 1.257,1.221,3.097 m.The accuracy of ENU direction of three-frequency pseudo-range single-point positioning is 2.102,2.380,4.612 m.②In the case of large ionospheric delay error,dual-frequency pseudo-range single-point positioning can effectively resist the influence of ionospheric error and improve the positioning accuracy of U-direction.③Because the pseudo-range single-point positioning error model is simple,the three-frequency ionospheric combination model expands the influence of noise and reduces the positioning accuracy.
作者
魏盛桃
张建
李得海
秘金钟
吴文坛
WEI Shengtao;ZHANG Jian;LI Dehai;BEI Jinzhong;WU Wentan(College of Geomatics,Shandong University of Science and Technology,Qingdao 266590,China;Chinese Academic of Surveying and Mapping,Beijing 100830,China;China University of Mining and Technology,Beijing 100083,China;Natural Resources Archive of Hebei Province,Shijiazhuang 050000,China)
出处
《无线电工程》
北大核心
2021年第4期292-296,共5页
Radio Engineering
基金
国家重点研发计划(2016YFB0502101,2016YFB0502105)。
