基于分区综合改正数的北斗卫星导航系统和GPS 组合的动态精密单点定位

BDS/GPS Combined Kinematic Precise Point Positioning Based on Zone Corrections

摘要:

提出一种基于分区综合改正数的北斗卫星导航系统（BDS）和GPS双系统组合（BDS/GPS)动态精密单点定位（PPP)模型。选取15个MGEX（multi-GNSS experiment）测站作为参考站或用户站进行试验，统计分析了20 d的BDS/GPS动态精密单点定位的精度及收敛性。结果表明，BDS双频动态精密单点定位平均13 min收敛至三维定位误差小于1 m，平均平面精度和平均高程精度分别优于0.15 m和0.30 m；BDS/GPS双频动态精密单点定位平均3 min收敛至三维定位误差小于1 m，平均平面精度和平均高程精度分别优于0.07 m和0.15 m。

关键词:北斗卫星导航系统（BDS）和GPS双系统组合（BDS/GPS);分区综合改正数;精密单点定位（PPP);收敛时间;定位精度

Abstract:

In this paper, a kinematic precise point positioning（PPP) model of BeiDou System(BDS)/GPS using zone corrections is proposed. Fifteen MGEX（multi-GNSS experiment） stations are selected as reference stations or evaluation stations. Then,the accuracy and the convergence of kinematic precise point positioning of BDS/GPS are analyzed based on 20-day data. Results show that BDS dual-frequency kinematic precise point positioning converges to 1 m in 13 min on average and the coordinate accuracy reaches 0.15 m in horizontal and 0.30 m in vertical component after convergence. The BDS/GPS dual-frequency kinematic precise point positioning shows better accuracy and shorter converge time, which converges to 1 m in 3 min on average and the coordinate accuracy is less than 0.07 m and 0.15 m in horizontal and vertical component, respectively.

Key words:BeiDou System(BDS) and GPS combined(BDS/GPS);zone correction;precise point positioning(PPP);convergence time;positioning accuracy