Extended Theory for Approximate ELF Propagation Constants in the Earth-Ionosphere Waveguide.

Abstract

Simple analytic approximate expressions have been derived for ELF propagation constants in the earth-ionosphere waveguide. The expressions are an extension of previous work to a more general class of ionospheric-conductivity height profiles. The expressions derived here allow the rapid computation of ELF phase speeds, attenuation rates, and excitation factors for a wide range of ionosphere conditions without the necessity of lengthy full-wave computer calculations. The results can be applied to the rapid evaluation of the effects of a variety of ionospheric disturbances, both natural and artificial, on ELF communication systems. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1979
Accession Number
ADA100868

Entities

People

  • Carl Greifinger
  • Phyllis Greifinger

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Altitude
  • Attenuation
  • Communication Systems
  • Computations
  • Differential Equations
  • Eigenvalues
  • Electromagnetic Fields
  • Equations
  • Frequency
  • Ionosphere
  • Ionospheric Disturbances
  • Magnetic Fields
  • Phase Velocity
  • Radio Waves
  • Refractive Index
  • Wave Equations
  • Wave Propagation

Readers

  • Calculus or Mathematical Analysis
  • Space/Atmospheric Physics.