电离层局部扰动对亚电离层VLF传播影响的数值模拟
Numerical Simulations Of The Effect Of Localised Ionospheric Perturbations On Subionospheric VLF Propagation
摘要：
电离层D区电子密度和温度的变化敏感地表现为在扰动区域下方传播的亚电离层甚低频（VLF）信号的幅度和相位的变化。D区的扰动（无论是电子密度还是温度）会对在地球-电离层波导中传播的甚低频波造成显著的散射，导致甚低频波的振幅和相位发生可测量的变化。我们分析了2008 - 2009年期间在贝尔格莱德站的亚电离层VLF信号（DHO/23.4 kHz，德国; GQD/22.1 kHz，英国; NAA/24.0 kHz，美国和ICV/20.9 kHz，意大利）的闪电诱导电子沉淀（LEP）事件。
英文摘要：
Electron density and temperature changes in the D-region of the ionosphere are sensitively manifested as changes in the amplitude and phase of subionospheric Very Low Frequency (VLF) signals propagating beneath the perturbed region. Disturbances (either in electron density or temperature) in the D region cause significant scattering of VLF waves propagating in the earth-ionosphere waveguide, leading to measurable changes in the amplitude and phase of the VLF waves. We analyze Lightning-induced electron precipitation (LEP) events during period 2008 - 2009 at Belgrade station on subionospheric VLF signals from four transmitters (DHO/23.4 kHz, Germany; GQD/22.1 kHz, UK; NAA/24.0 kHz USA and ICV/20.9 kHz Italy).
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