CAJ | 학술논문

针对倾斜地球同步轨道（IGSO）和中高地球轨道（MEO）卫星用于卫星双向时间传递（TWSTFT）时的卫星运动所引入的误差进行了研究,并对IGSO和MEO卫星应用于TWSTFT的可行性进行了分析。首先推导了TWSTFT中的卫星运动误差公式,并利用两行根数（TLE）对目前在轨的IGSO和MEO卫星的运动进行了计算,在此基础上对几个地面站间时间传递的卫星运动误差进行了仿真。仿真结果显示,由于卫星运动导致的卫星运动误差可达到10纳秒级,对于纳秒级精度的TWSTFT而言不可忽略,必须使用卫星定轨数据进行校正。使用精度优于1km的定轨数据校正后,可将卫星运动误差降低到1ns以下,满足纳秒级精度的时间传递需求。
침대경사지구동보궤도（IGSO）화중고지구궤도（MEO）위성용우위성쌍향시간전체（TWSTFT）시적위성운동소인입적오차진행료연구,병대IGSO화MEO위성응용우TWSTFT적가행성진행료분석。수선추도료TWSTFT중적위성운동오차공식,병이용량행근수（TLE）대목전재궤적IGSO화MEO위성적운동진행료계산,재차기출상대궤개지면참간시간전체적위성운동오차진행료방진。방진결과현시,유우위성운동도치적위성운동오차가체도10납초급,대우납초급정도적TWSTFT이언불가홀략,필수사용위성정궤수거진행교정。사용정도우우1km적정궤수거교정후,가장위성운동오차강저도1ns이하,만족납초급정도적시간전체수구。
This paper studies satellite motion errors of two-way satellite time and frequency transfer（TWSTFT） caused by IGSO and MEO satellites and analyzes the feasibility of IGSO and MEO satellites for TWSTFT.First of all,a satellite motion error formula is derived,and then some IGSO and MEO satellites motions from the two-line element（TLE） are calculated.Based on the satellite motion,the time transfer errors of several ground stations are simulated.The simulation results show that the satellite motion errors of TWSTFT could reach 10ns,which can＇t be ignored in the nanosecond accuracy TWSTFT and must be calibrated with satellite orbit prediction data.After being calibrated by satellite orbit prediction data which is more accurate than 1km,the satellite motion errors of TWSTFT could be lowered to less than 1ns,which meets the demand for sub-nanosecond accuracy time transfer.