摘要
为了进一步发挥北斗三号全球卫星导航系统(BDS-3)五频信号的优势,提出一种基于无电离层组合的BDS-3多频单点定位数学模型构建方法:给出无电离层组合多频单点定位(SPP)观测方程,并确定多频无电离层组合系数;然后构建BDS-3多频无电离层组合SPP数学模型;最后以55个多模全球卫星导航系统(GNSS)实验跟踪网(MGEX)测站多天实测数据为基础,进行全球BDS-3多频伪距单点定位性能评估实验。结果表明:BDS-3四频和五频SPP定位精度优于三频,在观测受限条件下即当高度截止角为30°时,BDS-3三频SPP定位精度在东、北、天方向上分别为1.31 m、1.60 m、4.89 m,而四频、五频则优于1.27 m、1.54 m、4.78 m,天方向提升较多;对于全球不同地区,BDS-3多频SPP定位在亚洲、大洋洲地区三维定位精度分别优于1.92 m和2.08 m,在美洲地区三维定位精度优于1.80 m,在欧洲、非洲及南极洲地区优于1.64 m。多频观测值对于增强BDS-3 SPP定位性能具有较明显影响。
In order to further capitalize on the advantages of the penta-frequency signals from the BeiDou-3 global navigation satellite system(BDS-3),the paper proposed a method for constructing a BDS-3 multi-frequency single point positioning mathematical model based on ionosphere-free combinations:the observation equations were provided for multi-frequency single-point positioning(SPP)with ionosphere-free combinations,and the coefficients for the combinations were determined;then,the mathematical model for BDS-3 multi-frequency ionosphere-free SPP was established;finally,based on the multi-day measured data from 55 multi-GNSS(global navigation satellite system)experiment(MGEX)tracking stations around the world,the global performance evaluation of multi-frequency pseudo-range SPP for BDS-3 system was carried out.Results showed that the positioning accuracy of BDS-3 quad-frequency and penta-frequency SPP would be better than that of triple-frequency;under the condition of observation limitation,when the elevation angle is 30°,the positioning accuracy of BDS-3 triple-frequency SPP would be 1.31 m,1.60 m and 4.89 m in the east,north and up directions,respectively,while the positioning accuracy of quad-frequency and penta-frequency SPP would be better than 1.27 m,1.54 m,and 4.78 m,with a significant improvement in the up direction;in addition,for different regions of the world,the three-dimensional positioning accuracy of BDS-3 multi-frequency SPP positioning would be better than 1.92 m and 2.08 m in Asia and Oceania,respectively,meanwhile,the three-dimensional positioning accuracy would be better than 1.80 m in America,and better than 1.64 m in Europe,Africa and Antarctica.In conclusion,multi-frequency observations could have a significant effect on enhancing the SPP positioning performance of BDS-3 system.
作者
董彪
陈健
赵兴旺
刘超
DONG Biao;CHEN Jian;ZHAO Xingwang;LIU Chao(School of Spatial Information and Geomatics Engineering,Anhui University of Science and Technology/Anhui Key Laboratory of Space-Ground Collaborative Monitoring and Early Warning of Mine Mining Disasters/Coal Industry Engineering Research Center for Collaborative Monitoring of Environment and Disaster in Mining Area,Huainan,Anhui 232001,China)
出处
《导航定位学报》
北大核心
2025年第5期144-154,共11页
Journal of Navigation and Positioning
基金
安徽理工大学青年科技基金项目(2024JBQN0026)。
