摘要
卫星广播轨道的精度直接影响导航系统的性能,因此广播轨道精度的评估至关重要。基于iGMAS平台,分析评估了北斗导航系统的GEO、MEO与IGSO三类不同轨道的卫星广播轨道精度。从广播星历文件中提取卫星轨道根数,解算出卫星的实时位置;从iGMAS监测评估中心获取精密星历,并采用切比雪夫多项式拟合精密星历计算出卫星的位置;利用解算出的卫星实时位置和精密星历求得卫星轨道误差。试验结果表明,北斗卫星系统广播轨道精度优于3 m,GEO卫星轨道误差大于MEO和IGSO卫星。
The accuracy of the broadcast track directly affects the performance of the navigation system, so the evaluation ofbroadcast track accuracy is of paramount importance. In view of this demand,based on the iGMAS platform,this paper analyzes and evaluates the satellite broadcast orbit accuracy of such three orbits as GEO,MEO and IGSO of BeiDou Navigation Satellite System.First,the satellite orbital root number is extracted from the broadcast ephemeris file to calculate the real-time position of the satellite.Second,the precise ephemeris is obtained from the iGMAS Monitoring and Evaluation Center,and then the satellite position is calculated using the Chebyshev polynomial fitting the precision ephemeris. Finally,the satellite orbit error is derived based on real time satellite position and precise ephemeris. The experimental results show that the broadcast orbit accuracy of Beidou satellite system is better than 3 m,and the orbit error of GEO satellite is higher than that of MEO and IGSO satellites.
作者
张晓旭
陈国通
张璞
杨建雷
王小娜
许文倩
ZHANG Xiaoxu;CHEN Guotong;ZHANG Pu;YANG Jianlei;WANG Xiaona;XU Wenqian(School of Information Science and Engineering,Hebei University of Science And Technology,Shijiazhuang 050018,China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)
出处
《无线电工程》
2018年第10期827-830,共4页
Radio Engineering
基金
国家重点研发计划基金资助项目(2016YFB0502402)
国家自然科学基金资助项目(91638203)
