多系统组合精密单点定位性能分析

文章提出在数据预处理之前进行钟跳探测与修复以避免周跳探测误判，而后对非差无电离层组合载波相位观测值进行星间单差，避免接收机钟差解算，有效降低了对伪距观测值随机模型建模精度的要求，最后给出了抗差Kalman滤波PPP解算模型。利用GPS、GLONASS、BDS数据，对单、双、三系统PPP定位精度和收敛时间进行了分析，得出了以下结论：三系统PPP技术无论定位精度还是收敛速度均是最优的，加强多系统组合导航定位有利于提高导航定位精度。

The Performance Analysis of Multi-System Integrated Precise Point Positioning (PPP)

The clock slip detection and repair method is advanced to avoid the wrong cycle slip detection. And then, the single differencing between satellites is introduced into triple-system PPP, which avoids the computation of the receiver clock error and reduces requirement on the random model accuracy of the pseudo range observation. After that, the robust Kalman filter is introduced to calculate PPP result. GPS, GLONASS and BDS data have been used to analyze to the system PPP positioning precision y and convergence time. Finally, the conclusion are drawn as following: no matter the positioning precision or convergence speed of the triple-system PPP technology is superior to the performance of dual-system PPP.