基于IGS实时服务(RTS)的车载实时动态PPP系统及精度分析

Real-Time Kinematic PPP System of In-vehicle Based on IGS Real-Time Service(RTS)and Its Accuracy Analysis

实时精密单点定位（precision point positioning,PPP）逐渐成为地学研究的重要手段。IGS（international GNSS service）实时服务（real-time service,RTS）产品的上线为实时精密单点定位提供了可能。为检验实时PPP在动态定位下的精度,设计了车载实时PPP系统并进行了野外定位实验。实验结果表明,进行实时动态PPP首先需要一段时间进行收敛,收敛以后车辆保持移动时,动态PPP定位精度与车辆静止时无明显变化。由于路边建筑或树木的遮挡,坐标精度会出现抖动情况。采用IGS01、IGS03、CLK15、CLK22、CLK52、CLK81和CLK90实时产品的定位精度相当,垂直精度大多在20cm以内,水平精度大多优于5cm。采用RTS进行车载实时动态PPP定位可以达到较高的定位精度,满足车载定位的需求。推荐采用IGS03和CLK90进行实时动态定位。

Real-time precise point positioning（PPP）has gradually become an important approach of geoscience research.IGS real-time service（RTS）product provides the possibility for real-time PPP.In order to test the real-time PPP performance in kinematic positioning,we designed the vehicle-based real-time PPP system and carried out an outdoor experiment.Results show that the real-time kinematic PPP needs a period timeto converge.After the convergence stage,the kinematic PPP accuracy is in agreement with the static PPP.Due to the occlusion of buildings or trees,the accuracy of coordinates sometimes jumps lightly.The real time products（IGS01,IGS03,CLK15,CLK22,CLK52,CLK81 and CLK90）have similar positioning accuracy.The vertical accuracy is better than 20 cm,the level of accuracy is within 5 cm.Real-time PPP based vehicle with IGS RTS products can archive high positioning accuracy,and meet the demand of vehicle positioning.