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

作　　者：肖恭伟 卞逸驰 何在民 广伟 尹翔飞 张润芝 XIAO Gongwei;BIAN Yichi;HE Zaimin;GUANG Wei;YIN Xiangfei;ZHANG Runzhi(School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Xi’an Research Institute of Surveying and Mapping,Xi’an 710054,China;State Key Laboratory of Geodesy and Earth’s Dynamics,Innovation Academy for Precision Measurement Science and Technology,CAS,Wuhan 430071,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]西安测绘研究所,陕西西安710054 [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

出　　处：《西安邮电大学学报》2024年第2期1-10,共10页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家重点研发计划“引力波探测”专项项目(2022YFC2204601,2023YFC2206100);陕西省自然科学基础研究计划项目(2023-JC-QN-0278)。

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,RTPPP-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。The influence of BeiDou-3 precise point positioning B2b(PPP-B2b)differential code biases(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,convergence time,troposphere,clock difference and slant total electron content of UPPP are analyzed.In uncombined mode,Real-time PPP-B2b software is adopted to conduct experimental analysis on the receiver measured data.Experiment results show that DCB has a small impact on positioning accuracy and convergence time when the weight ratio of carrier to pseudo range observations 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 delay can be neglected,and the impact on the receiver clock difference is at the sub-nanosecond level;and DCB has a large impact on the slant total electron content,DCB mainly affects the calculation 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 

分 类 号：TN011.2[电子电信—物理电子学] P228[天文地球—大地测量学与测量工程]