GPS、BDS、GPS+BDS精密单点定位精度评估

由于北斗系统卫星正式完成组网,因此有必要对BDS系统性能进行精度评估与分析.本文选取了MGEX网所采集的31 d观测数据,对比分析了GPS、BDS、GPS+BDS不同情况下静态与动态精密单点定位精度.试验结果表明,GPS和BDS单系统静态PPP在N、E、U方向上的精度分别优于4、4、7 cm;GPS+BDS组合系统静态...

Accuracy evaluation of GPS,BDS and GPS+BDS precise point positioning

In view of the completion of BeiDou satellite network, it is necessary to evaluate and analyze the system performance of BDS. The 31 day observation data collected by multi GNSS experience network is selected to compare and analyze the precision of static and dynamic precise point positioning under different conditions of GPS, BDS and GPS+BDS. The experimental results show that the accuracy of GPS and BDS single system static PPP in N, E, U direction is better than 4, 4, 7 cm, respectively; GPS+BDS combined system static PPP accuracy in N, E, U direction is better than 3, 3, 6 cm; GPS single system dynamic PPP accuracy in N, E, U direction is better than 5, 5, 10 cm; BDS single system dynamic PPP accuracy in N, E, U direction is better than 5, 6, 12 cm; GPS+BDS integrated system dynamic PPP accuracy is better than 4, 4, 8 cm in N, E, U direction. So the integrated system can improve the stability and accuracy of positioning compared with single system, and the advantages of the combined system are more obvious in the case of dynamic PPP.