ELECTROMAGNETIC PULSE PROPAGATION OVER NONUNIFORM EARTH SURFACE: NUMERICAL SIMULATION | Zendy

A. V. Popov | Zendy; V. V. Kopeikin | Zendy

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ELECTROMAGNETIC PULSE PROPAGATION OVER NONUNIFORM EARTH SURFACE: NUMERICAL SIMULATION

Author(s) -

A. V. Popov,

V. V. Kopeikin

Publication year - 2008

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

ISSN - 1937-6472

DOI - 10.2528/pierb08031102

Subject(s) - pulse (music) , surface (topology) , earth (classical element) , electromagnetic pulse , geology , geophysics , computer science , computational physics , physics , optics , geometry , mathematics , detector , mathematical physics

We simulate EM pulse propagation along the nonuniform earth surface using socalled time-domain parabolic equation. To solve it by finite differences, weintroduce a time-domain analog of the impedance boundary condition and anonlocal BC of transparency reducing open computational domain to a strip offinite width. Numerical examples demonstrate influence of soil conductivity onthe wide-band pulse waveform. For a high-frequency modulated EM pulse, wedevelop an asymptotic approach based on the ray structure of the monochromaticwave field at carrier frequency. This radically diminishes the computationcosts and allows for pulsed wave field calculation in vast domains measured bytens of thousands wavelengths.

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