顾及天线相位中心误差的SWARM卫星简化动力学精密定轨  

Reduced-Dynamic Precise Orbit Determination for SWARM Satellite:Considering Antenna Phase Center Error

作　　者：夏要伟 刘新[1] 郭金运[1] 孔巧丽[1] 纪兵[2] XIA Yaowei;LIU Xin;GUO Jinyun;KONG Qiaoli;JI Bing(College of Geomatics,Shandong University of Science and Technology,579 Qianwangang Road,Qingdao 266590,China;Department of Navigation Engineering,Naval University of Engineering,717 Jiefang Road,Wuhan 430033,China)

机构地区：[1]山东科技大学测绘科学与工程学院,青岛市266590 [2]海军工程大学导航工程系,武汉市430033

出　　处：《大地测量与地球动力学》2020年第6期612-617,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41774001,41374009,41774021,41874091,41704015);山东科技大学科研创新团队支持计划(2014TDJH101)。

摘　　要：对SWARM卫星进行简化动力学精密定轨,估计接收机天线相位中心偏差(PCO),并基于所得到的载波相位残差对天线相位中心变化(PCV)误差进行建模,验证其对轨道精度的影响。结果表明,当使用PCO信息时,定轨精度改善明显,径向、切向和法向的RMS值分别提升47%、48%和66%;加入PCV模型后,3个方向的精度有mm级的提升。SLR检核结果显示,同时考虑PCO和PCV,SWARM三颗卫星的平均RMS值为2.29 cm,与事后科学轨道十分接近。对比不同分辨率PCV模型定轨的结果发现,选择5°×5°PCV模型较为合适。In this paper,we determine SWARM satellite orbits using the reduced-dynamic method,and estimate the receiver antenna PCO and PCV models based on the carrier phase residuals to verify their influence on orbit determination accuracy.The results show that when using PCO information,the accuracy of orbit determination is obviously improved,and the radial,along-track and cross-track RMSs are improved by 47%,48%and 66%,respectively.After correcting the PCV effect,the POD accuracies in three directions are improved to the mm level.The SLR RMS statistics show that,considering the PCO and PCV,the average RMS of SWARM is 2.29 cm,which is very close to the post-scientific orbit.Finally,after comparing different PCV models,we infer that the 5°×5°PCV grid model is suitable for SWARM satellite POD.

关 键 词：SWARM 星载GPS 天线相位中心偏差 天线相位中心变化 SLR 

分 类 号：P228[天文地球—大地测量学与测量工程]