利用广播星历和区域参考网实现实时精密单点定位算法研究

Research on Network Augmented Real-time Precise Point Positioning Algorithm with Broadcast Ephemeris

提出并实现了一种基于广播星历和区域参考网的实时精密单点定位的新算法——NAPPP(network augmented precise point positioning)。采用可实时获取的广播星历,将用户站与附近的若干参考站一起联合处理,实时估计用户站位置参数以及导航卫星轨道和钟差改正数。实验结果表明,NAPPP算法静、动态实时定位精度分别为1～2cm和2～6cm,其定位精度和收敛速度明显优于基于IGS最终轨道和30s钟差的PPP定位结果,与基于CODE最终轨道和5s钟差的PPP定位结果相当。

A network augmented real-time precise point positioning algorithm called NAPPP was proposed.The new algorithm process data of user station together with some other nearby reference stations,and estimate position of user station,satellite position and clock corrections on-the-fly based on the real-time accessible broadcast ephemeris.The NAPPP software was developed and experiments were carried out based on the network composed of 5 IGS stations from European area.The results support that the positioning accuracy of NAPPP is about 1-2 cm and 2-6 cm respectively for static and kinematic positioning.Both positioning performance and convergence time are far better than PPP result with IGS final orbit and 30 s clocks,and comparable with PPP result with final orbit and 5 s clocks of CODE.