摘要
针对北斗卫星(BDS)在定位时卫星高度截止角偏高时精度无法满足的问题。本文先使四大系统时空基准统一,后研究单星(BDS)、双星(BDS/GPS、BDS/GLONASS、BDS/GALILEO)和三星(BDS/GALILEO/GLONASS)单点定位数据的卫星可见数和精度因子PDOP均值,收敛性、单点定位精度。实验证明:单星系统、双星系统和三星系统在高度截止角的不断增加,卫星可见数和历元可用度不断减少,PDOP值波动较大,单点定位精度和收敛性越差。当高度截止角为40°时,双星系统和单星系统无法满足定位精度,三星系统仍然满足定位精度要求。
The positioning accuracy of Beidou Satellite(BDS) cannot be satisfied when the cut-off angle of satellite altitude is too high. In this paper,the spatial and temporal benchmarks of the four systems are first unified,and then satellite visibility and precision factor PDOP mean value,convergence and single-point positioning accuracy of single-star(BDS),dual-star(BDS/GPS,BDS/GLONASS,BDS/GALILEO) and three-star(BDS/GALILEO/GLONASS) single-point positioning data are studied. Experimental results show that: with the continuous increase of the cut off angle of the dual-star system and the three-star system,the number of satellite visibility and the availability of epoch are decreasing,the PDOP value fluctuates greatly,and the single point positioning accuracy and convergence are worse. When highly cut-off angle of 40°,single system and binary system can’t satisfy positioning accuracy,three-star system still satisfies the requirement of positioning accuracy.
作者
王枭轩
陆兆峰
左小清
杨泽楠
布金伟
谢文斌
Wang Xiaoxuan;Lu Zhaofeng;Zuo Xiaoqing;Yang Zenan;Bu Jinwei;Xie Wenbin(College of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;The Institution of Geological Surveying and Mapping of Zhejiang Province,Hangzhou 310030,China)
出处
《城市勘测》
2019年第6期75-80,共6页
Urban Geotechnical Investigation & Surveying
基金
云南省高校工程研究中心建设计划资助
