北斗三号PPP-B2b差分码偏差对UPPP解算的影响
The impact of differential code biases of BDS-3 PPP-B2b on UPPP solution
肖恭伟 1卞逸驰 2何在民 2广伟 2尹翔飞 3张润芝2
作者信息
- 1. 西安邮电大学 通信与信息工程学院,陕西 西安 710121;西安测绘研究所,陕西 西安 710054;中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,湖北武汉 430071
- 2. 西安邮电大学 通信与信息工程学院,陕西 西安 710121
- 3. 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,湖北武汉 430071
- 折叠
摘要
通过北斗三号精密单点定位服务信号(Precise Point Positioning B2b,PPP-B2b)差分码偏差(Differential Code Biases,DCB)对实时非组合精密单点定位(Uncombined Precise Point Positioning,UPPP)解算参数的影响进行研究.基于PPP-B2b服务的UPPP模型,分析了 DCB对UPPP定位、收敛时间、对流层、钟差及斜向电离层解算的影响.在非组合模型下,采用北斗三号PPP-B2b实时精密单点定位(Real-Time Precise Point Positioning B2b,RT-PPP-B2b)软件对接收机实测数据进行实验分析.实验结果表明:载波与伪距观测值权比为103∶1时,DCB对定位精度和收敛时间影响均较小,载波与伪距观测值权比为102∶1时,无DCB校正的UPPP定位误差收敛时间会变长;DCB对解算对流层天顶总延迟的影响可以忽略,对接收机钟差影响在亚纳秒级别;在使用UPPP提取斜向电离层过程中,DCB主要影响斜向电离层的计算精度.
Abstract
The influence of BeiDou-3 precise point positioning B2b(PPP-B2b)differential code bi-ases(DCB)on the real-time uncombined precise point positioning(UPPP)solution parameters is studied.Based on PPP-B2b services of the UPPP model,the effects of DCB on the position,con-vergence time,troposphere,clock difference and slant total electron content of UPPP are ana-lyzed.In uncombined mode,Real-time PPP-B2b software is adopted to conduct experimental anal-ysis on the receiver measured data.Experiment results show that DCB has a small impact on posi-tioning accuracy and convergence time when the weight ratio of carrier to pseudo range observa-tions is 103∶1,and the convergence time of UPPP positioning error without DCB correction will become longer when the weight ratio is 102∶1;the impact of DCB on solving the zenith total de-lay can be neglected,and the impact on the receiver clock difference is at the sub-nanosecond lev-el;and DCB has a large impact on the slant total electron content,DCB mainly affects the calcula-tion accuracy of the oblique ionosphere.
关键词
全球导航卫星系统/精密单点定位服务信号/北斗三号/非组合精密单点定位/差分码偏差Key words
global navigation satellite system/precise point positioning B2b/BeiDou-3/uncom-bined precise point positioning/differential code biases引用本文复制引用
基金项目
国家重点研发计划引力波探测专项(2022YFC2204601)
国家重点研发计划引力波探测专项(2023YFC2206100)
陕西省自然科学基础研究计划(2023-JC-QN-0278)
出版年
2024
NETL
NSTL
万方数据