摘要
研究不同卫星高度角对GPS/GLONASS/BDS/Galileo(G+R+B+E)融合定位的影响,并建立了相应的模型.采用MGEX(Multi-GNSS Experiment)提供的全球卫星导航系统(GNSS)数据,经理论分析和算例表明:G+R+B+E组合使得参与定位的有效卫星增多,在不同的卫星高度角下均能保证较多的卫星数,保证较好的空间几何分布结构;组合系统达到一定的卫星数后,卫星高度角对定位结果影响不大;当卫星高度角大于30°时,相对于单一的GPS定位G+R+B+E在3D方向的外符合定位精度有所改善.
This paper studied the offects of different satellites elevation on GPS/GLONASS/BDS/Galileo(G+R+B+E)fusion positioning and corresponding model was established.Using global navigation satellite system(GNSS)data provided by MGEX(Multi-GNSS Experiment),the theoretical analysis and experiments showed that,combination of G+R+B+E increased the number of satellite used for positioning,and could ensure a relative large number of satellites and a good space geometric distribution structure.Satellites elevation had little effect on positioning result when the satellites of combined system reached a certain number.External error accuracy of G+R+B+E combination in 3D direction was improved when satellites elevation was larger than 30°.
作者
覃继前
徐宁辉
梁月吉
QIN Jiqian;XU Ninghui;LIANG Yueji(Nanning Surveying and Mapping Geographic Information Institute,Nanning 530001,China;College of Geomatics and Geoinformation,Guilin University of Technology,Guilin 541004,China)
出处
《全球定位系统》
CSCD
2021年第2期62-68,共7页
Gnss World of China
基金
广西空间信息与测绘重点实验室项目(16-380-25-22)。
关键词
卫星高度角
多系统
卫星可见数
位置精度衰减因子(PDOP)
精度分析
satellites elevation
multi-systems
the number of visible satellites
position dilution of precision(PDOP)
precision analysis
