基于星间单差法的GEO卫星精密定轨  

The GEO Satellite Precise Orbit Determination Based on Inter-satellite Single Difference Method

作　　者：刘吉华[1,2,3] 欧吉坤[1] 孙保琪[1,3] 钟世明[1] 

机构地区：[1]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,武汉市徐东大街340号430077 [2]湖北大学商学院,武汉市学院路11号430062 [3]中国科学院研究生院,北京市玉泉路甲19号100049

出　　处：《武汉大学学报（信息科学版）》2011年第1期24-28,共5页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2007AA12Z305);国家自然科学基金资助项目(40874009);总装航天装备总体研究发展中心等联合资助项目

摘　　要：提出了一种利用星间单差法消除接收机钟差的GEO卫星精密定轨方案。通过仿真,详细探讨了相关原理、参数设置、测站分布以及单差选星等关键问题。仿真研究表明,该方法消去了接收机钟差、大部分与测站相关的系统误差以及用模型未完全改正的对流层及电离层延迟残差,能够直接解算卫星轨道参数,减轻测站接收机时钟同步的负担;通过方案对比,确定了一种优化方案,选取合适的卫星对,在现有条件下采用合适的测站分布,利用星间单差方法解算22参数,可以获得高精度的GEO卫星轨道。In this paper,a novel scheme of GEO orbit determination was proposed,which cancelled out the receiver clock error and others system errors by single difference（SD） between the two observations of different satellites at the same epoch on the same station.The basic theory and some key techniques of parameter selection,station distribution and reference satellite selection,etc.were discussed in detail by simulation cases.The simulated results reveal 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.An optimized scheme was put forward by simulation cases to select satellite pairs and set observing stations under current situation.High precision orbit of 22 parameters could be obtained by the proposed scheme.

关 键 词：GEO卫星 星间单差 精密定轨 

分 类 号：P173.1[天文地球—天文学]