| 基于GNSS的LEO卫星TRAIM可用性算法及分析 |
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| 引用本文： | 马 洋,李延东,王韶波,蒙 薇,赵黎晔. 基于GNSS的LEO卫星TRAIM可用性算法及分析[J]. 大地测量与地球动力学, 2018, 38(8): 832-835 |
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| 作者姓名： | 马 洋 李延东 王韶波 蒙 薇 赵黎晔 |
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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500 km、650 km、800 km和1 400 km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100 ns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。
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| 关 键 词： | GNSS LEO 时间同步 TRAIM 可用性 |
TRAIM Availability Algorithms and Analysis for LEOs Based on GNSS |
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| MA Yang,LI Yandong,WANG Shaobo,MENG Wei,ZHAO Liye. TRAIM Availability Algorithms and Analysis for LEOs Based on GNSS[J]. Journal of Geodesy and Geodynamics, 2018, 38(8): 832-835 |
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| Authors: | MA Yang LI Yandong WANG Shaobo MENG Wei ZHAO Liye |
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| Abstract: | 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. |
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| Keywords: | GNSS LEO time synchronization TRAIM availability |
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