Effect of a Cylindrically-Symmetric Ionospheric Disturbance on ELF Propagation in the Earth-Ionosphere Waveguide.

Abstract

A nuclear explosion in the earth's ionosphere produces a depression in the ionosphere that is approximately cylindrically symmetric. In this paper, a method is developed for calculating the change in amplitude and phase at a receiver of an ELF (extremely low frequency) radio wave in the presence of such a localized, cylindrically-symmetric disturbance. Numerical results are obtained for the particular configuration where the center of the disturbance is directly above the transmitter-receiver path. The attenuation from one edge of the disturbance to the opposite edge is found to be only about half of that calculated by the two-dimensional WKB approximation usually employed in such problems.

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Document Details

Document Type
Technical Report
Publication Date
Jun 10, 1977
Accession Number
ADA046237

Entities

People

  • Carl Greifinger
  • Phyliss Greifinger

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Bessel Functions
  • Depression
  • Differential Equations
  • Eigenvalues
  • Electric Fields
  • Equations
  • Extremely Low Frequency
  • Frequency
  • Ionosphere
  • Ionospheric Disturbances
  • Magnetic Fields
  • Nuclear Explosions
  • Phase Velocity
  • Radio Waves
  • Scattering
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Space/Atmospheric Physics.