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基于GNSS的LEO卫星TRAIM可用性算法及分析 被引量:2

TRAIM Availability Algorithms and Analysis for LEOs Based on GNSS
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摘要 详细研究了基于GNSS的LEO卫星接收机授时自主完好性(TRAIM)故障检测数学模型以及可用性算法。以GPS和BDS组合为例,分别对500km、650km、800km和1 400km等几种典型轨道高度的卫星,开展基于GNSS的LEO卫星TRAIM可用性仿真分析。结果表明,在告警阈值100ns时,基于GPS+BDS组合系统的TRAIM检测可用概率达到99.1%以上,基本满足LEO卫星TRIAM检测可用性需求。 TRAIM availability models and algorithms are discussed,and the simulation platform is constructed based on STK and MATLAB software.The simulation of the four different LEOs(500 km,650 km,800 km and 1 400 km),based on observations of GPS and BDS,shows that the combined method can achieve the TRAIM availability probability of 99.1% when the threshold of the TRAIM is 100 ns,indicating that TRAIM availability based on BDS and GPS can meet the demand of time synchronization integrity for LEOs.
作者 马洋 李延东 王韶波 蒙薇 赵黎晔 MA Yang;LI YANDong;WANG Shaobo;MENG Wei;ZHAO Liye(DFH Satellite Co Ltd,104 Youyi Road,Beijing 100094,China)
出处 《大地测量与地球动力学》 CSCD 北大核心 2018年第8期832-835,共4页 Journal of Geodesy and Geodynamics
关键词 GNSS LEO 时间同步 TRAIM 可用性 GNSS LEO time synchronization TRAIM availability
作者简介 马洋,博士,高级工程师,主要从事卫星大地测量学与卫星总体设计研究,E-mail:my_dfh@126.com。
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