V.L.F. Propagation

Galejs, Janis

doi:10.1016/b978-0-08-016710-7.50013-2

Cited by 18 publications

(1 citation statement)

References 41 publications

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“…Waveguide mode theory, 13–19 finite difference time domain (FDTD), 20–26 and finite difference frequency domain (FDFD) 27 are common methods to calculate VLF wave in the waveguide. In 2017, Marshall et al 27 conducted simulations of transmitter signals by using three models: the long‐wavelength propagation capability (LWPC), a FDTD model, and a FDFD model.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Method study on VLF propagable modes coupling and interference in the anisotropic earth‐ionosphere waveguide

Liu,

Wang,

Zhang

et al. 2024

Int J Numerical Modelling

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In this paper, the coupled‐mode theory is incorporated into the improved frequency‐domain finite element method (FEM) to simulate very low frequency (VLF) propagable modes coupling and interference in the anisotropic Earth‐ionosphere waveguide. The matrix equation of the electric field is solved using parallel lower‐upper factorization technique to speed up the calculation. The method used to determine the propagation constants for different propagable modes is given. After the FEM is validated by comparing simulated results with the measured data, effects of variable geomagnetic information on the attenuation rate, relative phase velocity, mode coupling, and multiple‐mode interference of VLF electromagnetic wave in the anisotropic waveguide are investigated. This work provides an efficient way for improving the prediction accuracy of the VLF communication, positioning, navigation, and timing systems.

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Section: Introductionmentioning

confidence: 99%

Finite Element Method study on VLF propagable modes coupling and interference in the anisotropic earth‐ionosphere waveguide

Liu,

Wang,

Zhang

et al. 2024

Int J Numerical Modelling

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Effect of the total solar eclipse of 20 March 2015 on the ELF propagation over high‐latitude paths

Tereshchenko

Sidorenko

Tereshchenko

et al. 2015

Geophysical Research Letters

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Propagation of the artificial electromagnetic waves with frequency of 82 Hz in the Earth‐ionosphere waveguide was observed during the solar eclipse on both partially and totally obscured high‐latitude paths with a length of 450–1200 km. Field excitation was monitored by the reference measurements in the near zone of the transmitter, which are free of the ionospheric influence. It is found that the amplitude of the field at the remote points varied depending on the solar illumination and solar elevation angle. We suppose that this effect was probably caused by the increase in the effective height of the ionospheric D layer, just as it was previously observed in VLF. The obtained results demonstrate the response of the propagating extremely low frequency (ELF, 3–300 Hz) wave to the change in the ionospheric boundary. This effect has been for the first time observed in this frequency range during a total solar eclipse.

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Conversion of electrostatic field of atmosphere to ELF radiation of launched rocket

Николаенко¹

1991

Radiophys Quantum Electron

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V.L.F. Propagation

Cited by 18 publications

References 41 publications

Finite Element Method study on VLF propagable modes coupling and interference in the anisotropic earth‐ionosphere waveguide

Finite Element Method study on VLF propagable modes coupling and interference in the anisotropic earth‐ionosphere waveguide

Effect of the total solar eclipse of 20 March 2015 on the ELF propagation over high‐latitude paths

Conversion of electrostatic field of atmosphere to ELF radiation of launched rocket

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