具有先验信息的区域增强系统卫星轨道确定方法  

Regional Orbit Determination of Navigation Satellite Based on Global Priori Information

作　　者：耿涛[1] 赵齐乐[1] 刘经南[1] 李国鹏[2] 

机构地区：[1]武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号430079 [2]国家测绘局第一大地测量队,西安市测绘路4号710054

出　　处：《武汉大学学报（信息科学版）》2010年第4期491-494,共4页Geomatics and Information Science of Wuhan University

基　　金：国家863计划重点资助项目(2007AA120603);国家973计划资助项目(2006CB701301);中国科学院精密导航定位与定时技术重点实验室开放基金资助项目(2009PNTT02)

摘　　要：针对中国实时精密定位服务系统的建设,提出了一种具有全球先验信息的导航卫星轨道确定方法,其关键点在于先验轨道信息权函数的确定。首先在预报轨道误差特性分析的基础上,给出了采用一阶高斯-马尔科夫模型进行先验信息权函数的建立方法;然后对先验信息和区域观测数据赋予相应权,进行联合定轨。To satisfy the construction of CHINA Real-Time Precise Positioning Service System, a method of orbit determination of navigation satellite based on priori global information （predicted orbit） is developed. The key is that how the weighting matrices of priori information are computed. Firstly its mathematic model is expressed. Then the characterization of predicted orbit error is analyzed, and a method of achieving the priori information＇s weighting matrices by Gauss Markov process is addressed. At last orbit is determined combining the priori information and regional tracking stations＇ data. Experiment proves that this method is feasible and gets relatively encourage result.

关 键 词：区域增强系统 区域定轨 实时定轨 轨道预报 高斯-马尔科夫过程 

分 类 号：P228.41[天文地球—大地测量学与测量工程]