| 基于卫星服务中断的GPS在中国服务区可用性分析 |
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| 引用本文： | 李国重,李军正,李建文,归庆明.基于卫星服务中断的GPS在中国服务区可用性分析[J].测绘学院学报,2011(1). |
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| 作者姓名： | 李国重 李军正 李建文 归庆明 |
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| 作者单位： | 信息工程大学理学院;信息工程大学测绘学院; |
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| 基金项目： | 国家自然科学基金资助项目(40474007,40974009); 河南省基础与前沿技术研究计划资助项目(082300410240); 郑州市科技计划公关资助项目(0910SGYG21198) |
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| 摘 要： | 由于导航卫星硬件失效和轨道维持等原因,会引起卫星服务的暂时中断。卫星服务中断又会导致导航星座可用性下降。以GPS卫星4类中断的平均间隔时间、平均恢复时间为参数,建立了导航卫星的平均可用性及导航星座平均可用性数学模型。仿真分析了卫星服务中断的情况下GPS在我国服务区的可用性。仿真结果对于我国目前进行的区域卫星导航系统建设(北斗卫星导航系统建设的第2步)以及参与GPS市场竞争均具有重要作用。
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| 关 键 词： | 导航星座 服务中断 可见星数 单星可用性 星座可用性 |
Analysis of Availability of GPS in China Territory Volume Based on Satellite Service Intermittence |
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| LI Guo-zhong,LI Jun-zheng,LI Jian-wen,GUI Qing-ming.Analysis of Availability of GPS in China Territory Volume Based on Satellite Service Intermittence[J].Journal of Institute of Surveying and Mapping,2011(1). |
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| Authors: | LI Guo-zhong LI Jun-zheng LI Jian-wen GUI Qing-ming |
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| Institution: | LI Guo-zhong1,2,LI Jun-zheng2,LI Jian-wen2,GUI Qing-ming1,2(1.Institute of Science,Information Engineering University,Zhengzhou 450001,China,2.Institute of Surveying and Mapping,Zhengzhou 450052,China) |
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| Abstract: | Due to hard failures and satellite orbit maintenance,etc,satellite service intermittence happens,which reduces the availability of navigation constellation.The availability model of satellite and constellation was set up based on the Means Time Between Failures(MTBF) and the Mean Time To Repair(MTTR),which was able to evaluate objectively navigation constellation performance.The number of the visible satellites and the PDOP(Position Dilution of Precision) availability of GPS were discussed and calculated in... |
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| Keywords: | navigation constellation service intermittence visible satellite numbers satellite availability constellation availability |
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