卫星导航系统监测站覆盖性能分析  

Analysis on the coverage of satellite navigation system Monitor Stations

作　　者：李作虎[1] 郝金明[1] 李建文[1,2] 赵齐乐[2] 张成军[1] 

机构地区：[1]信息工程大学测绘学院,郑州450052 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《中国科学：物理学、力学、天文学》2010年第5期546-553,共8页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：卫星导航与定位教育部重点实验室(B类)开放基金资助项目(批准号:GRC-2009005)

摘　　要：监测站作为卫星导航系统控制段的重要组成部分之一,对系统基本服务功能的提供和各项性能指标的保持都具有重要意义.研究了一种用于监测站覆盖性能评估的模型;基于该模型以GPS为例对单个监测站覆盖性能、站际重叠覆盖性能以及监测网整体覆盖性能进行了实验分析,结果表明该模型可以用于监测站性能评估和布网设计及优化;采用模拟仿真的方法对GPS地面监测站的故障敏感性进行了分析,确定了在整个监测网络中具有重要影响以及能够导致较大完好性风险产生的监测站;最后提出了一种基于监测站网覆盖性能的系统完好性增强设计,并探讨了监测站的布设原则,给出了一种基于覆盖性能的分期分级布设方案.As one of the important components of satellite navigation system control segment, Monitor Stations are of great significance for the provision of system basic service function and the maintenance of all performance indexes of the system. A model used for the assessment of Monitor Stations coverage is given, which can be used as the basis to carry out tests and analysis on three aspects including the coverage of single station, the overlap of two stations and the whole coverage of Monitor Station net, taking GPS for instance. The results show that this model is effective to evaluate the Monitor Station coverage and design the net and optimize it. Then the sensitivity analysis of GPS ground station outages is carried out, which determines the stations that are of great influence and can be resulted in larger integrity risks. A design of the integrity augmentation based on the coverage of Monitor Station net is given. And the distributing method of Monitor Stations is discussed with a scheme by stages and classification based on the coverage.

关 键 词：卫星导航系统 监测站 覆盖性能 完好性 故障分析 

分 类 号：TN967.1[电子电信—信号与信息处理]