GPS空间信号可用性评估算法  

Evaluation Algorithm of GPS Signal in Space Availability

作　　者：王尔申[1,2,3] 张晴[1] 雷虹 庞涛[1] 曲萍萍[1] WANG Er-shen ZHANG Qing LEI Hong PANG Tao QU Ping-ping(Shenyang Aerospace University, School of Electronic and Information Engineering Liaoning General Aviation Key Laboratory, Shenyang 110136, China School of Electronic and Information Engineering, Beihang University, Beijing 100191, China Electromagnetic Environment Effect Top Laboratory of Aviation Industry, Shenyang 110035, China)

机构地区：[1]沈阳航空航天大学电子信息工程学院,沈阳110136 [2]沈阳航空航天大学辽宁省通用航空重点实验室,沈阳110136 [3]北京航空航天大学电子信息工程学院,北京100191 [4]电磁环境效应航空科技重点实验室,沈阳110035

出　　处：《电光与控制》2017年第2期39-42,46,共5页Electronics Optics & Control

基　　金：国家自然科学基金(61571309;61101161);国家重点基础研究发展计划("九七三"计划)(2010CB731805);航空科学基金(2011ZC54010);辽宁省自然科学基金联合基金(2013024003)

摘　　要：在民航等应用领域,卫星导航系统的可用性是决定其能否作为唯一或主要导航系统的关键性能指标。主要对GPS卫星导航系统的空间信号(SIS)可用性进行评估分析,研究一种基于马尔可夫过程的卫星导航单星可用性算法模型,并研究对卫星导航星座可用性的评估模型。结合GPS实测数据和GPS标准定位服务性能标准(GPS SPS PS)中的可用性指标,证明提出的空间信号评估模型有效且符合GPS SIS可用性指标要求。研究结果对我国北斗卫星导航系统可用性的评估具有一定的参考价值。In civil aviation and other application fields, the availability of satellite navigation system is the key performance indicator for whether it can be taken as the only or the main navigation system. This paper mainly evaluates and analyzes the availability of Space-in-Signal （SIS） of GPS satellite navigation system. A model of single satellite availability algorithm based on Markov process is presented, and the model for evaluating availability of navigation satellite constellation is studied. In addition, based on the relevant data and the availability index of the latest GPS Standard Positioning Service Performance Standards （ GPS SPS PS）, it is verified that the model is effective and conforms with the availability index of GPS SIS. The result has great reference value to the study of the availability of BeiDou navigation system.

关 键 词：GPS 空间信号 可用性 北斗卫星导航系统 

分 类 号：O213.2[理学—概率论与数理统计]