GNSS空间信号连续性评估模型与算法

发布时间：2018-04-03 18:34

  本文选题：GNSS　切入点：连续性　出处：《导航定位学报》2016年01期

【摘要】：连续性是评估GNSS性能的重要指标之一。针对空间信号层面,提出了GNSS空间信号连续性的定义,给出了单颗卫星空间信号连续性的统一模型与算法,在此基础上,利用GNSS广播星历和顾及卫星中断数据开展了GPS/GLONASS/BDS/Galileo系统的空间信号连续性计算。结果表明:剔除计划中断后,BDS三类卫星GEO/IGSO/MEO空间信号连续性分别达到0.998 2、0.997 9和0.997。在未剔除计划中断情况下,GPS空间信号连续性优于0.999 8,GLONASS空间信号连续性优于0.999 7,Galileo系统空间信号连续性优于0.997。BDS和GPS卫星达到了各自系统制定的空间信号连续性标准。
[Abstract]:Continuity is one of the important indexes to evaluate the performance of GNSS.According to the spatial signal level, the definition of GNSS spatial signal continuity is proposed, and the unified model and algorithm of single satellite spatial signal continuity are given.GNSS broadcast ephemeris and satellite interrupt data are used to calculate the spatial signal continuity of GPS/GLONASS/BDS/Galileo system.The results show that the continuity of GEO/IGSO/MEO space signals of three kinds of satellites is 0.998 ~ 0.997 9 and 0.997 respectively after the interruption of the plan.The continuity of GPS spatial signal is better than that of 0.999 7 0.997.BDS and GPS satellites, and the continuity of spatial signal is better than that of 0.999 8 GLONASS without eliminating the planned interruption. The continuity of the spatial signal is better than that of the 0.997.BDS and GPS satellites, which meet the standards of spatial signal continuity established by their respective systems.
【作者单位】： 解放军信息工程大学导航与空天目标工程学院;西安测绘研究所;
【分类号】：P228.4

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