基于众源数据集的城市道路GNSS车辆定位误差分析  

Urban Vehicle GNSS Positioning Error Analysis Based on Crowdsourcing Data Set

作　　者：王强[1] 李雯[2] 袁洪[2,3] WANG Qiang;LI Wen;YUAN Hong(School of Cyber Engineering,Xidian University,Xi′an 710126,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Qingdao Academy for Opto-Electronics Engineering,Qingdao 266000,China)

机构地区：[1]西安电子科技大学,陕西西安710126 [2]中国科学院空天信息研究院,北京100094 [3]青岛市光电工程技术研究院,山东青岛266000

出　　处：《测绘与空间地理信息》2020年第10期63-67,共5页Geomatics & Spatial Information Technology

基　　金：国家重点研发计划项目“协同精密定位技术”(2016YFB0501900);青岛创新领军人才项目(16-8-3-5-zhc)资助。

摘　　要：城市道路是一个存在信号遮挡、多径、非视距干扰的复杂场景,这给使用全球卫星导航系统(Global Navigation Satellite System,GNSS)的车载定位带来了误差。本文提出了一种利用车辆众源定位数据提取GNSS定位误差的方法,针对城市典型道路环境,利用北京市1个月的出租车实际数据进行了定位误差提取和分析。结果表明:道路环境对GNSS定位精度的影响十分显著,开阔路段的定位精度明显优于城市峡谷,且单侧遮挡路段的定位误差存在系统性的漂移和单边拖尾现象。此外,在道路环境因素与车载导航仪所采用的时域滤波处理共同作用下,定位误差的分布与行车速度存在明显关联。本工作得到的分析结论有助于改善车载GNSS定位终端的设计。The environmental factors of urban road(signal occlusion,multipath,non-line-of-sight,etc.)bring vehicle positioning error to the global navigation satellite system(GNSS).Evaluating the error level objectively will help improve the design of vehicle GNSS positioning terminal.To this end,this paper proposes a method for extracting GNSS positioning error by using vehicle GNSS crowdsourcing data set.Taking the actual data of one month Beijing taxi positioning as example,carried out the statistical analysis of the positioning error in the typical urban road environment.Experiments show that the road environment has a significant impact on the GNSS positioning accuracy.The positioning accuracy under the open road section is obviously better than that of the single-sided occlusion section and the urban canyon section,and the positioning error of the unilateral occlusion section will systematically drifting and unilateral tailing.In addition,the statistical results also show that in the occlusion environment,the distribution of positioning error has a significant correlation with the driving speed,which caused by the combination factors of the time domain filtering process used by the car navigation system and the road environment factor.

关 键 词：城市道路 GNSS车辆定位 众源数据 定位误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]