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.
作者
龙海
叶世榕
夏凤雨
陈德忠
聂桂根
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)
出处
《大地测量与地球动力学》
CSCD
北大核心
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)。
