【作者】 刘吉华； 欧吉坤； 钟世民； 彭碧波；

【Author】 LIU Jihua~(1,2,3) OU Jikun~1 SUN Baoqi~(13) ZHONG Shiming~1 1 Key Laboratories of Dynamical Geodesy,Institute of Geodesy and Geophysics,Chinese Academy of Sciences,340 Xu Dong Road,Wuhan 430077,China 2 Hubei University,11 Xue Yuan Road,Wuhan 430062,China 3 Graduate University of the Chinese Academy of Sciences,19 Yu Quan Road,Beijing 100049,China

【机构】 中国科学院测量与地球物理研究所,动力大地测量学重点实验室； 湖北大学； 中国科学院研究生院；

【摘要】 在GEO卫星的局部地区轨道测定中,测站接收机的钟差很难与轨道同时解算,通常需要使用站间时间同步或其他方法消除钟差后才能进行GEO卫星的精密定轨,且所得轨道z(惯性系)向的精度较差。本文提出了一种基于GEO与IGSO星间单差消去测站钟差的方案,利用IGSO卫星南北方向较大幅度的位置变化,解决局部地区轨道测定的GEO轨道需要站问时问同步以及轨道Z向精度较差的难题。通过仿真,研究基于IGSO与GEO卫星星间求差的单差精密定轨方法,探讨了相关原理,测站分布等关键问题。仿真研究表明:该方法消去测站接收机的钟差,直接解算GEO与IGSO卫星的轨道,可以减轻地面测站同步的负担;在现有条件下,可以同时获得高精度的GEO卫星与IGSO卫星的轨道。更多还原

【Abstract】 In the GEO satellite orbit determination by the region stations.the system error is hard to be calculated correctly. The general method to determinate precise orbit of the GEO satellite iS that firstly makes the clock of stations synchronization or acquiring the station clock by using other methods,and the accuracy of z direction is poor.In this paper,a novel scheme of GEO and IGSO orbit determination was proposed,which cancelled out the receiver clock error by single difference(SD) between GEO and IGSO.Since the position of IGSO satellite has large change relatively in the North-South direction.the accuracy of Z direction of GEO satellite is improved.The basic theory,station distribution and reference satellite selection.etc were discussed in detail by simulation cases.The simulated results reveals that the receiver clock error could be cancelled out and the parameters of the satellite orbit could be calculated directly.Also,the scheme reduces the burden of station clock synchronization.Under the present conditions,high precision orbit could be obtained by the proposed scheme.更多还原