【作者】 胡豪杰； 赵兴旺； 陶远； 刘超； 张浩；

【Author】 Hu Haojie;Zhao Xingwang;Tao Yuan;Liu Chao;Zhang Hao;School of Geomatics,Anhui University of Science & Technology;

【机构】 安徽理工大学测绘学院；

【摘要】 随着北斗卫星导航系统(BDS)的发展,BDS已实现高精度事后PPP并为多系统组合PPP性能提升做出贡献,目前,已有多家国际GNSS服务中心提供实时服务,实时PPP应用成为发展趋势之一。鉴于此,本文基于BDS系统进行组合实时PPP研究,首先选取10个MGEX站点15天观测数据对CNES CLK93 BDS实时轨道、钟差产品精度进行评估及验证。再对BDS、GPS、BDS/GPS三种方案下进行静、动态PPP解算,对实时PPP定位性能进行分析。由实验可知,BDS MEO/IGSO卫星实时轨道及钟差产品精度稍低于GPS产品,BDS GEO卫星产品精度最差。定位性能上,BDS/GPS组合实时PPP性能优于单BDS系统,静态模式下,BDS/GPS组合系统在E、N、U方向收敛时间为12.6min、5.8min、31.9min,相对于单BDS分别提高了74%、84%、56%;E、N、U方向平均定位精度为4.30cm、2.04cm、5.61cm,相对于单BDS分别提高了41%、75%、54%。动态模式下,BDS/GPS在E、N、U方向平均收敛时间分别为10.8min、6.6min、16.7min,相对于单BDS提高了82%、87%、76%;BDS/GPS组合系统在E、N、U方向平均定位精度都在1dm左右,相对于单BDS系统提高了52%、55%、56%。更多还原

【Abstract】 Recent developments of Beidou Satellite Navigation System(BDS) have realized high-precision post-PPP and contributed to the improvement of multi-system PPP performance.There are many inter-graphics GNSS service centers providing real-time services and real-time PPP Application has become one of the development trends.In view of this,this article conducts a combined real-time PPP study based on the BDS system.First,15-day observation data of 10 MGEX sites are selected to evaluate and verify the accuracy of the CNES CLK93 BDS real-time orbit and poor product.The solutions of BDS,GPS,and BDS/GPS in static and kinematic modes are used to analyze the performance of real-time PPP.It can be known from experiments that the accuracy of BDS MEO/IGSO satellite real-time orbit and clock products is slightly lower than that of GPS products,and BDS GEO satellite products own the worst accuracy.In terms of positioning performance,the real-time PPP performance of the BDS/GPS combination is better than that of the BDS system.In static mode,the average convergence time of BDS/GPS solution in the E,N,and U directions is 12.6 min,5.8 min,and 31.9 min,with the improvement of 74%,84%,and 56%,respectively,compared to BDS solution;the average positioning accuracy in the E,N,and U directions is 4.30 cm,2.04 cm,and 5.61 cm,which are 41%,75%,and 54% higher than BDS solution,respectively.In kinematic mode,the average convergence times of BDS/GPS in the E,N,and U directions are 10.8 min,6.6 min,and 16.7 min,respectively,which are 82%,87%,and 76% higher than the single BDS:the BDS/GPS combined system in E The average positioning accuracy in the directions of N,U,and U are about 1 dm,which is 52%,55%,and 56% higher than the single BDS system.更多还原