应用时域有限差分（FDTD）方法分析甚低频在地电离层波导中的传播特性。
The propagation characteristic of the VLF in the earth-ionosphere waveguide is analyzed by applying the FDTD method.
应用时域有限差分（FDTD）方法分析甚低频在地电离层波导中的传播特性。
The propagation characteristic of the VLF in the earth-ionosphere waveguide is analyzed by applying the FDTD method.
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