BNC/RTKLIB/PPPWIZARD实时精密单点定位服务性能评估

Performance Evaluation of BNC/RTKLIB/PPPWIZARD Real-Time Precise Point Positioning Service

为综合评估目前应用广泛的3款GNSS开源软件BNC、RTKLIB和PPPWIZARD的RTPPP服务性能,均匀选取9个全球IGS-MGEX观测站实时GPS、GLONASS、Galileo三系统数据,对比分析3款软件接收数据流的完整率,并评估不同软件的收敛速度、定位精度和数据有效率。结果显示:1)3款软件的实时数据完整率基本都保持在96%以上,但相比较而言PPPWIZARD软件实时数据的完整率最优,BNC次之,RTKLIB相对较差;2)三系统中BNC、RTKLIB和PPPWIZARD软件分别在14 min、82 min和12 min左右收敛至三维点位精度优于0.5 m;3)在实时定位精度方面,BNC、RTKLIB和PPPWIZARD软件在水平和高程方向定位精度依次为9 cm和12 cm、16 cm和20 cm、7 cm和12 cm,其中PPPWIZARD软件采用了模糊度固定解;4)3款软件在数据有效率指标上存在差别,其中BNC和PPPWIZARD软件数据的有效率均达到95%,RTKLIB软件低于73%。总体而言,BNC与PPPWIZARD软件的实时PPP服务性能指标基本相当,RTKLIB软件稍差。

We comprehensively evaluate the RTPPP service performance of three widely used GNSS open source software programs:BNC,RTKLIB and PPPWIZARD.We select nine IGS-MGEX observation stations evenly distributed all over the world to analyze and compare the integrity rates of data streams from real-time GPS,GLONASS and GALILEO as received by the three software programs.The convergence speed,positioning accuracy and data efficiency of the different software programs are evaluated.The results of numerical examples show that:1)The communication stability of the three software programs is high and the real-time data integrity rate is basically above 96%.In comparison,the real-time data integrity rate of PPPWIZARD is the best,BNC takes the second place,while RTKLIB is relatively poor.2)Using the data of the triple systems,BNC,RTKLIB and PPPWIZARD software programs converge to three-dimensional point position with precision better than 0.5m at about 14 min,82 min and 12 min.3)In terms of the accuracy of real-time positioning,the accuracy of BNC,RTKLIB and PPPWIZARD software in the horizontal and vertical directions are respectively at about 9 cm and 12 cm,16 cm and 20 cm,7 cm and 12 cm,in which PPPWIZARD adopts ambiguity fixed solution.4)The data efficiency index of the three software programs do not share very much in common,among which BNC and PPPWIZARD data efficiency reach about 95%,and RTKLIB data efficiency is lower than 73%.In general,the service performance indicators of BNC and PPPWIZARD's real-time PPP are basically the same,while RTKLIB results are relatively poorer.