综合星间和地面测距数据的导航卫星联合定轨  

Combined Orbit Determination of Navigation Satellites with Cross-link Ranging Observations and Ground Tracking Observations

作　　者：刘万科[1] 龚晓颖[1] 李征航[1] 王甫红[1] 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2010年第7期811-815,共5页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2009AA12Z301);武汉大学卫星导航与定位教育部重点实验室(B类)开放研究基金资助项目(GRC-2009008)

摘　　要：简要地论述了基于星间测距数据和地面跟踪数据的导航卫星联合定轨中的观测模型、定轨软件及数据模拟方法等,在此基础上,基于自编的联合定轨软件进行了不同方案的模拟计算。结果表明,采用星地联合定轨模式,不仅可以获得很好的定轨精度,而且可大量减少地面跟踪站的布设数目以及降低对地面站的几何分布要求;地面跟踪站数量的增加及其地理分布的改善对提高联合定轨精度作用有限。This paper discusses the mathematical models,simulation methods of observations,and methods of COD（combined orbit determination） of navigation satellites,which is based on cross-link ranging observations and ground tracking observations.A variety of simulations were processed with the software developed by ourselves in this paper,and the results indicate that the effect of adding ground stations and improving their geographical distribution on improving the accuracy of combined orbit determination is very limited.

关 键 词：导航卫星 联合定轨 地面跟踪数据 星间测距数据 模拟计算 

分 类 号：P228.41[天文地球—大地测量学与测量工程]