BDS-3 MEO卫星偏航姿态对PPP的影响  

Impact of Yaw Attitude of BDS-3 MEOs on PPP Performance

作　　者：龙海 叶世榕[1] 夏凤雨 陈德忠[1] 聂桂根[1] LONG Hai;YE Shirong;XIA Fengyu;CHEN Dezhong;NIE Guigen(GNSS Research Center,Wuhan University,129 Luoyu Road,Wuhan 430079,China;Department of Geodesy and Geoinformation Science,Technical University of Berlin,STRA E des 17,Juni 135,Berlin 10623,Germany)

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉市430079 [2]柏林工业大学大地测量与地球信息科学系,STRA E des 17,Juni 135,Berlin 10623

出　　处：《大地测量与地球动力学》2022年第10期1000-1004,共5页Journal of Geodesy and Geodynamics

基　　金：国家重点研发计划(2019YFC1509603);国家自然科学基金(41974031)。

摘　　要：系统比较深地影期间BDS-3 SECM和CAST MEO卫星采用公开的偏航姿态模型计算的模型姿态与名义姿态的差异,首次评估其对天线相位缠绕和相位中心等几何误差的改正及PPP结果的影响。结果表明,对于机动期间的BDS-3 MEO卫星,采用名义姿态会导致CAST和SECM卫星的天线相位中心改正误差分别达0.2 m和0.02 m,相位缠绕改正误差达0.1~0.2周。由于卫星机动时间较短以及观测几何构型较强,与模型姿态相比,名义姿态的使用并不会引起PPP结果显著下降。We systematically compare the differences between the modeled attitude and nominal attitude derived by the published yaw attitude models for BDS-3 SECM and CAST MEOs during deep eclipse seasons,and evaluate its influence on the calculation of antenna phase wind-up and phase center offsets(PCO)and PPP performance for the first time.The research shows that,for BDS-3 MEOs during maneuvers,adopting nominal attitude will cause the PCO correction errors for CAST and SECM satellites to reach 0.2 m and 0.02 m,respectively,and the wind-up correction errors to reach 0.1-0.2 cycles.Due to the shorter duration of satellite maneuvers and stronger geometric strength,compared with the modeled attitude,the use of the nominal attitude will not cause a significant drop in the PPP results.

关 键 词：偏航姿态 BDS-3 MEO卫星 精密单点定位 

分 类 号：P228[天文地球—大地测量学与测量工程]