| 双卫星故障条件下的RAIM可用性研究 |
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| 引用本文： | 倪育德,蔡娜.双卫星故障条件下的RAIM可用性研究[J].中国民航学院学报,2010,28(5):29-32. |
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| 作者姓名： | 倪育德 蔡娜 |
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| 作者单位： | 中国民航大学电子信息工程学院,天津,300300;中国民航大学智能信号与图像处理天津市重点实验室,天津,300300 |
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| 摘 要： | 现有的关于接收机自主完好性监测（RAIM）算法大部分是基于单颗卫星故障的假设,但随着GPS技术的发展,多颗卫星发生故障的可能性已不能再被忽视,特别是两颗卫星同时发生故障的情况。本研究基于对水平定位误差保护级（HPL）的分析,从一颗卫星故障的可用性出发,推导出两颗卫星故障时的可用性。率先给出了在两颗卫星故障的情况下,天津区域内RAIM算法的可用性。仿真结果表明：两颗卫星故障的可用性低于单颗卫星故障的可用性。
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| 关 键 词： | 接收机自主完好性监测 可用性 水平低维误差保护级 卫星导航系统 |
Research on Availability of RAIM under Assumption of Simultaneous Two-Faulty Satellites |
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| NI Yu-de,CAI Na.Research on Availability of RAIM under Assumption of Simultaneous Two-Faulty Satellites[J].Journal of Civil Aviation University of China,2010,28(5):29-32. |
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| Authors: | NI Yu-de CAI Na |
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| Institution: | a,b(a.College of Electronics Information Engineering;b.Tianjin Key Laboratory for Advanced Signal Processing,CAUC,Tianjin 300300,China) |
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| Abstract: | Most algorithms on receiver autonomous integrity monitoring（RAIM）are under the assumption of a single-satellite fault;however within the advent of GPS,the probability of multiple satellite faults,especially the two-satellite faults,can no longer be neglected.This article is based on the analysis of horizontal protection level（HPL）,starting from the availability of a satellite failure to derive the availability of RAIM under the assumption of simultaneous two-faulty satellites.The availability under the assumption of simultaneous two-faulty satellites in Tianjin′s regional is given for the first time.The results show that the availability of dual satellites failure is worse than that of single satellite failure. |
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| Keywords: | RAIM availability HPL satellite navigation system |
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