Preprints
https://doi.org/10.5194/angeo-2021-49
https://doi.org/10.5194/angeo-2021-49

  31 Aug 2021

31 Aug 2021

Review status: this preprint is currently under review for the journal ANGEO.

FDTD analysis of ELF radio wave propagation in the spherical Earth-ionosphere waveguide and its validation based on analytical solutions

Volodymyr Marchenko1, Andrzej Kulak2, and Janusz Mlynarczyk2 Volodymyr Marchenko et al.
  • 1Jagiellonian University, Astronomical Observatory, Krakow 30-244, Poland
  • 2AGH University of Science and Technology, Institute of Electronics, Krakow 30-059, Poland

Abstract. The FDTD model of electromagnetic wave propagation in the Earth-ionosphere cavity was developed under assumption of axisymmetric system, solving the reduced Maxwell’s equations in a 2D spherical coordinate system. The model was validated on different conductivity profiles for the electric and magnetic field components for various locations on Earth along the meridian. The characteristic electric and magnetic altitudes, the phase velocity and attenuation rate were calculated. We compared the results of numerical and analytical calculations and found good agreement between them. The undertaken FDTD modeling enables us to analyze the Schumann resonances and the propagation of individual lightning discharges occurring at various distances from the receiver. The developed model is particularly useful when analyzing ELF measurements.

Volodymyr Marchenko et al.

Status: open (until 24 Oct 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Volodymyr Marchenko et al.

Volodymyr Marchenko et al.

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Short summary
We developed a new approach for validation the numerical models of electromagnetic wave propagation in the Earth-ionosphere waveguide. We compared the parameters of the waveguide (i.e., characteristic electric and magnetic altitudes, resonance frequencies, phase velocity and attenuation rate) obtained from numerical model with correspondent analytical calculations. We tested such validation for various conductivity profiles and find good agreement between analytical and numerical results.