王康宁,付海洋. 基于射线追踪的TID期间电离层高阶效应及多普勒效应仿真[J]. 电波科学学报,2022,37(6):1032-1038. DOI: 10.12265/j.cjors.2022008
      引用本文: 王康宁,付海洋. 基于射线追踪的TID期间电离层高阶效应及多普勒效应仿真[J]. 电波科学学报,2022,37(6):1032-1038. DOI: 10.12265/j.cjors.2022008
      WANG K N, FU H Y. Simulation of the ionospheric higher-order effect and Doppler effect during TID based on ray tracing[J]. Chinese journal of radio science,2022,37(6):1032-1038. (in Chinese). DOI: 10.12265/j.cjors.2022008
      Citation: WANG K N, FU H Y. Simulation of the ionospheric higher-order effect and Doppler effect during TID based on ray tracing[J]. Chinese journal of radio science,2022,37(6):1032-1038. (in Chinese). DOI: 10.12265/j.cjors.2022008

      基于射线追踪的TID期间电离层高阶效应及多普勒效应仿真

      Simulation of the ionospheric higher-order effect and Doppler effect during TID based on ray tracing

      • 摘要: 电离层行进式扰动(traveling ionospheric disturbance, TID)是一种常见的电离层扰动形式,对电磁波(如卫星导航)信号的传播过程有着重要影响. 为研究TID对卫星导航信号传播效应,本文基于三维射线追踪方法对导航信号在空间电离层磁等离子体的传播进行仿真,重点研究TID情况下电离层二阶效应和多普勒效应. 首先,通过在NeQuick电离层模型上添加电离层扰动建立TID仿真生成模型,该模型能够模拟多种尺度的TID结构;其次,基于我国南北方两个虚拟站点,仿真模拟得到导航信号在TID发生时的传播特性;然后,计算得到不同仰角和方位角时卫星导航信号的电离层二阶效应和多普勒效应等参数;最后,分析TID参数对电离层二阶效应和多普勒效应的影响. 仿真结果表明,在本文仿真参数下电离层二阶和多普勒效应在低射线仰角情况下更明显,TID多普勒效应和TID周期相关性明显.

         

        Abstract: Traveling ionospheric disturbance (TID) is a common observed ionospheric disturbance, which have impacts on the propagation process of electromagnetic wave at gigahertz (such as satellite navigation) signals. In order to investigate the propagation effect of TID on satellite navigation signal, this paper simulates the propagation of navigation signal in magnetized ionospheric plasmas based on three-dimensional ray tracing method. We focus on the second-order ionospheric effect and Doppler effect during ionospheric TID disturbance. Firstly, this paper establishes the TID generation model by adding disturbance into the NeQuick ionospheric model, which can simulate different scales of the TID structure. Secondly, the propagation characteristics of navigation signal in TID are obtained based on two virtual stations in the North and South of China. Then, the second-order ionospheric effect and Doppler parameters of navigation signals at different elevation and azimuth angles have been calculated. Finally, the TID parameters on the ionospheric second-order and Doppler effect have been analyzed. The simulation results show that the ionospheric second-order effect and Doppler effect may become more important for low elevation rays. Also, the Doppler effect is significantly correlated with the period of TID.

         

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