典型复杂城市环境下GNSS单点定位方法及性能分析  

GNSS Single Point Location Method and Performance Analysis in Typical Complex Urban Environment

作　　者：吴有龙 陈帅[2] WU You-long;CHEN Shuai(Jinling Institute of Technology,Nanjing 211169,China;Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]金陵科技学院电子信息工程学院,江苏南京211169 [2]南京理工大学自动化学院,江苏南京210094

出　　处：《金陵科技学院学报》2021年第4期14-20,共7页Journal of Jinling Institute of Technology

基　　金：江苏省高等学校自然科学研究面上项目(19KJB510028);江苏省博士后科研资助计划项目(2021K463C);基础加强计划技术领域基金(2020-JCJQ-JJ-409)。

摘　　要：利用全球导航卫星系统(GNSS)仿真数据对不同高度角下全向遮挡街道和两向完全遮挡街道的单点定位性能进行分析。结果表明:1)在全向遮挡街道观测环境下,当卫星高度角小于50°时,多系统GNSS的水平和垂直定位精度分别优于3 m和5 m;当卫星高度角大于或等于50°时,尽管大部分时间可见卫星数大于4,但卫星几何结构较差,导致定位结果存在几十米至上百米的误差。2)在两向完全遮挡街道观测环境下,当卫星高度角小于30°时,多系统GNSS的水平和垂直定位精度分别优于5 m和10 m;随着卫星高度角的增加,卫星几何结构变差,定位性能急剧下降。The single point positioning performance of omni-directional and two-way completely sheltered streets at different height angles are analyzed by using global navigation satellite system simulation data.The results show that:1)In the omni-directional sheltered street observation environment,when the satellite altitude angle is less than 50°,the horizontal and vertical positioning accuracy of multi system GNSS is better than 3 m and 5 m respectively.When the satellite altitude angle is greater than or equal to 50°,although the numbers of visible satellites are greater than 4 in most of the time,the satellite geometry is poor,which results in tens of meters to hundreds of meters of error in positioning results.2)Under the two-way completely sheltered street observation environment,when the satellite altitude angle is less than 30°,the horizontal and vertical positioning accuracy of multi system GNSS is better than 5 m and 10 m respectively.With the increase of satellite altitude angle,the satellite geometry becomes worse and the positioning performance decreases sharply.

关 键 词：城市环境 单点定位 GNSS 位置精度因子 卫星高度角 可见卫星数 

分 类 号：P228[天文地球—大地测量学与测量工程]