赵珍珠,刘江凡,蒲玉蓉,等. 基于IRI电离层模型的低频天波信号特性分析[J]. 电波科学学报,2022,37(5):898-904. DOI: 10.12265/j.cjors.2021269
      引用本文: 赵珍珠,刘江凡,蒲玉蓉,等. 基于IRI电离层模型的低频天波信号特性分析[J]. 电波科学学报,2022,37(5):898-904. DOI: 10.12265/j.cjors.2021269
      ZHAO Z Z, LIU J F, PU Y R, et al. Analysis of low-frequency sky wave signal characteristics based on IRI ionospheric model[J]. Chinese journal of radio science,2022,37(5):898-904. (in Chinese). DOI: 10.12265/j.cjors.2021269
      Citation: ZHAO Z Z, LIU J F, PU Y R, et al. Analysis of low-frequency sky wave signal characteristics based on IRI ionospheric model[J]. Chinese journal of radio science,2022,37(5):898-904. (in Chinese). DOI: 10.12265/j.cjors.2021269

      基于IRI电离层模型的低频天波信号特性分析

      Analysis of low-frequency sky wave signal characteristics based on IRI ionospheric model

      • 摘要: 研究电离层对低频天波信号的影响对其在远程导航授时中的应用具有重要意义. 文中结合IRI电子密度模型和NRLMSISE-00大气模型,采用分层半空间中平面波传播的准一维双线性变换时域有限差分方法,计算了低频天波经电离层的反射信号,分析了反射信号幅度、时延、多径随入射角度、一天中的时间及季节的变化. 仿真结果表明:对于TE波,随着入射角度的增大,反射系数幅度先减小后增大;一天中经电离层反射的罗兰C低频天波信号幅度相差最大可达32.22 dB,时延差可达69.03 \textμs;经电离层反射的罗兰C低频天波信号一般包含一个完整的罗兰信号,在昼夜过渡时会出现两个信号.

         

        Abstract: Studying the impact of the ionosphere on low-frequency sky-wave signals is of great significance for its application in long-distance navigation and timing. In this paper, combining the international reference ionosphere (IRI) electron density model and the NRLMSISE-00 atmospheric model, using the quasi-one-dimensional bilinear transform finite-difference time-domain method of plane wave propagation in a layered half space, the reflected signal of low-frequency sky wave reflected by the ionosphere is calculated, and the variation of the amplitude, time delay and multipath of the reflected signal with the angle of incidence, time of day, and season are analyzed. The simulation results show that: as the incident angle increases, the amplitude of the reflection coefficient first decreases and then increases for TE wave; the amplitude of the Loran C low-frequency sky wave signal reflected by the ionosphere in a day differs by up to 32.22 dB, and the time delay difference can reach 69.03 \textμs; the Loran C sky wave signal reflected by the ionosphere generally contains a complete Loran C signal, and contain two signals during the transition between day and night.

         

      /

      返回文章
      返回