摘要
在卫星导航定位过程中,当辅助式定位算法在信号质量不佳时,利用更多的观测卫星数据进行冗余计算,能够补齐缺失的信号时间并得到定位结果.由我国自行研制的北斗卫星导航系统(BDS)采用了混合卫星星座,有一类地球同步轨道(GEO)卫星,具有24 h可见、轨道高覆盖面大、信号功率强等优势.论文分析了在特殊情况下,只能接收到GEO卫星时的辅助式定位算法以及算法的性能差异.结果表明:在没有高程等先验信息辅助的情况下,直接使用5颗GEO卫星也能获得一定的定位精度保障.
In the process of satellite navigation and positioning,when the signal quality is poor,the auxiliary positioning algorithm can use more observed satellite data for redundant calculation,supplement the missing signal time and obtain the positioning results.The Beidou Satellite Navigation System(BDS)independently developed by China adopts a hybrid satellite constellation,including a class of Geostationary Earth Orbit(GEO) satellites,which has the advantages of 24 h visibility,high orbit,large coverage and strong signal power.This paper analyzes the auxiliary positioning algorithm and the performance difference of the algorithm when only GEO satellites can be received in special cases.The conclusion shows that without the assistance of prior information such as elevation,the direct use of five GEO satellites can also obtain a certain positioning accuracy guarantee.
作者
吴鹏
冯璐
黄雅静
仝海波
WU Peng;FENG Lu;HUANG Yajing;TONG Haibo(Changsha University,Changsha 410022,China)
出处
《全球定位系统》
CSCD
2022年第4期101-105,共5页
Gnss World of China
基金
国家自然科学基金(52077011)
长沙市科技局2020年重大专项(kq2011001)
湖南省科技厅2022年重点研发项目(2022GK2026)
湖南省自然科学基金(2022JJ30636)。
关键词
卫星导航
辅助式定位
地球同步轨道(GEO)卫星
北斗卫星导航系统(BDS)
GPS
satellite navigation
auxiliary positioning
Geostationary Earth Orbit(GEO)
BeiDou Navigation Satellite System(BDS)
Global Positioning System(GPS)