电离层随机特性对ELoran天波传播的影响

IF 1.3 4区 物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS
Zhenzhu Zhao;Jiangfan Liu;Jinsheng Zhang;Yurong Pu;Xiaoli Xi
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引用次数: 0

摘要

本文分析了电离层随机特性对增强罗兰(eLoran)天波信号的影响。首先,推导了层状半空间各向同性等离子体的双线性变换随机时域有限差分(S-BT-FDTD)方法,验证了eLoran天波信号场分量均值和标准差计算的正确性。其次,结合国际参考电离层、伪一维BT-FDTD方法和蒙特卡罗方法,分析了eLoran天波信号振幅和时延的均值和标准差;仿真结果表明,在eLoran信号带宽范围内,反射系数振幅(RA)的均值保持不变。电子密度的标准差越大,RA的标准差也越大。白天RA的标准差大于夜间RA的标准差。时间延迟的平均值保持不变,而时间延迟的标准差与电子密度的随机变化方式有关。当入射角增大时,RA增大,RA的标准差减小,延时减小,延时的标准差减小,信号变得更加稳定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Effect of Random Characteristics of Ionosphere on the Propagation of ELoran Sky Waves
In this study, the effect of random characteristics of the ionosphere on the enhanced Loran (eLoran) sky-wave signal was analyzed. First, the bilinear transform stochastic finite-difference time-domain (S-BT-FDTD) method in layered half-space isotropic plasma is derived, and the correctness of the calculation of the mean value and standard deviation of the field components of the eLoran sky-wave signal is verified. Second, the mean value and standard deviation of the amplitude and time delay of the eLoran sky-wave signal were analyzed by combining the International Reference Ionosphere, pseudo-1-D BT-FDTD method, and Monte Carlo method. The simulation results show that the mean value of the amplitude of the reflection coefficient amplitude (RA) in the eLoran signal bandwidth remains unchanged. The larger the standard deviation of the electron density, the larger is the standard deviation of RA. The standard deviation of RA during the day is greater than that at night. The mean value of the time delay remains unchanged, and the standard deviation of the time delay is related to the way the electron density varies randomly. When the incident angle increases, the RA increases, the standard deviation of RA decreases, the time delay decreases, the standard deviation of the time delay decreases, and the signal becomes more stable.
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来源期刊
IEEE Transactions on Plasma Science
IEEE Transactions on Plasma Science 物理-物理:流体与等离子体
CiteScore
3.00
自引率
20.00%
发文量
538
审稿时长
3.8 months
期刊介绍: The scope covers all aspects of the theory and application of plasma science. It includes the following areas: magnetohydrodynamics; thermionics and plasma diodes; basic plasma phenomena; gaseous electronics; microwave/plasma interaction; electron, ion, and plasma sources; space plasmas; intense electron and ion beams; laser-plasma interactions; plasma diagnostics; plasma chemistry and processing; solid-state plasmas; plasma heating; plasma for controlled fusion research; high energy density plasmas; industrial/commercial applications of plasma physics; plasma waves and instabilities; and high power microwave and submillimeter wave generation.
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