MGEX差分码偏差产品对BDS-3伪距单点定位的影响研究
Influence of MGEX Differential Code Bias Products on BDS-3 Pseudorange Single Point Positioning
胡倬铭 1袁海军 1何秀凤 1章浙涛 1王进2
作者信息
- 1. 河海大学地球科学与工程学院,江苏 南京,211100
- 2. 北方信息控制研究院集团有限公司,江苏 南京,211153
- 折叠
摘要
为研究不同差分码偏差(differential code bias,DCB)产品对BDS-3伪距单点定位的影响,推导了 BDS-3单频和双频无电离层组合伪距单点定位卫星端DCB改正模型,基于多模全球导航卫星系统(global navigation satellite system,GNSS)实验跟踪网发布的中国科学院(Chinese Academy of Sciences,CAS)和德国宇航中心(Deutsches Zentrum für Luf-tund Raumfahrt,DLR)两种DCB产品,并结合全球不同纬度均匀分布的国际GNSS服务测站连续7天的BDS-3实测数据对B1I、B1C和B2a单频与B1C/B2a、B1I/B3I两种常用无电离层组合伪距单点定位精度进行对比分析.实验结果表明,在B1I、B1C、B2a 3种频率和B1C/B2a、B1I/B3I两种组合中,CAS产品改正后的定位精度整体上优于DLR产品,具体来说,定位精度的平均值在E、N、U 3个方向上分别提高了 3 cm、1 cm和6 cm.
Abstract
Objectives:In order to study the influence of different differential code bias(DCB)products on BDS-3 pseudorange single point positioning,the BDS-3 single-frequency and dual-frequency ionospheric-free combined pseudorange single point positioning satellite-side DCB correction model was derived.Methods:Based on two DCB products of Chinese Academy of Sciences(CAS)and Deutsches Zentrum für Luftund Raumfahrt(DLR)released by the multi-global navigation satellite system(GNSS)experiment,combined with the BDS-3 measured data from the International GNSS Service stations evenly distributed in different latitudes around the world for 7 days of B1I,B1C and B2a single frequency and B1C/B2a,B1I/B3I two commonly used ionospheric-free combined pseudorange single point positioning accuracy for com-parison and analysis.Results:Experimental results show that in the three frequencies of B1I,B1C,and B2a and the two combinations of B1C/B2a and B1I/B3I,the positioning accuracy of CAS products after correc-tion is better than that of DLR products as a whole.Specifically,the average of positioning accuracy has in-creased 3 cm,1cm,and 6 cm in the directions of E,N,and U,respectively.Conclusions:It can be con-cluded that for BDS-3 pseudorange single point positioning,the positioning accuracy of CAS products after correction is generally better than that of DLR products.
关键词
北斗三号卫星/差分码偏差/伪距单点定位Key words
BeiDou-3 satellite/differential code deviation/pseudorange single point positioning引用本文复制引用
基金项目
国家自然科学基金(41830110)
国家自然科学基金(42004014)
江苏省自然科学基金青年基金(BK20200530)
中国博士后科学基金(2020M671324)
江苏省博士后科研资助计划(2020Z412)
大地测量与地球动力学国家重点实验室开放基金(SKLGED2020-3-8-E)
南京市留学人员科技创新项目()
出版年
2024
NETL
NSTL
万方数据