Scattering of ELF waves by underground formations because of night-day ionospheric ridge

C. A. Valagiannopoulos, N. K. Uzunoglu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the present work the variation in ionospheric height observed during the dawn or dusk hours is used to develop an electromagnetic imaging system for extremely low frequencies (ELF). The description concerns the mathematical principles of the proposed method rather than a realistic implementation of the technique. The scattering of ELF waves emanating from a point source on the Earth surface by a cylindrical underground formation is studied analytically with use of a Green's function method. The ionospheric discontinuity is treated with the help of mode matching technique and the subterranean scatterer by application of the method of auxiliary sources. Numerical results are presented and discussed for several cases.

Original languageEnglish
Article numberRS6S32
JournalRadio Science
Volume42
Issue number6
DOIs
Publication statusPublished - Dec 1 2007

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Earth and Planetary Sciences(all)
  • Electrical and Electronic Engineering

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