北斗三号卫星天线相位中心改正模型对精密定轨和定位的影响  

Impact of Satellites Antenna Phase Center Correction Model on BDS-3 Precise Orbit Determination and Positioning

作　　者：任琛 王晨 李振洪[1,2] REN Chen;WANG Chen;LI Zhenhong(School of Geological Engineering and Geomatics,Chang’an University,126 Yanta Road,Xi’an 710054,China;Big Data Center for Geosciences and Satellites(BDCGS),Chang’an University,126 Yanta Road,Xi’an 710054,China)

机构地区：[1]长安大学地质工程与测绘学院,西安市710054 [2]长安大学地学与卫星大数据研究中心,西安市710054

出　　处：《大地测量与地球动力学》2022年第12期1227-1232,1261,共7页Journal of Geodesy and Geodynamics

基　　金：中央高校基本科研业务费专项(CHD300102261304);陕西省自然科学基础研究计划(2022-JQ283);长安大学研究生科研创新实践项目(300103722041)。

摘　　要：基于实测数据分析天线相位中心PCO改正模型和观测值频点选择对北斗三号卫星精密定轨和定位的影响。结果表明,基于北斗官方CSNO发布的PCO模型定轨定位表现稍优于IGS协议模型。此外,相较于两者PCO模型差异的影响,B1C/B2a与B1I/B3I观测值频点的选择对精密定位影响更为显著。以IGS B1I/B3I PCO模型为参考,CSNO B1C/B2a PCO模型定位坐标在E、N、U方向上的精度分别提升约5%、13%、14%,可应用于北斗高精度数据处理。This paper analyzes the influence of antenna phase center offset models and the combination of new and legacy frequencies on the BDS-3 precise orbit determination and positioning.The results show that generally the orbit determination and positioning based on the CSNO PCO model are slightly better than the IGS protocol model.Compared to the effects caused by the differences between CSNO and IGS PCO models,the selection of combination frequencies of B1C/B2a and b1I/b3I has a more significant impact on precise point positioning.In addition,taking the IGS B1I/B3I PCO model as a reference,the accuracy of positioning coordinates in E,N and U component using the CSNO B1C/B2a PCO model are improved by 5%,13%and 14%respectively,so it is recommended to be used in BDS high-precision data processing.

关 键 词：北斗三号 天线相位中心改正模型 精密定轨 精密定位 

分 类 号：P228[天文地球—大地测量学与测量工程]