Rocket Investigations of the VLF Ionospheric Transmission Window.

Abstract

Receivers were flown in rockets from Eglin Air Force Base, Florida, Natal, Brazil, and Fort Churchill, Canada, to study the fields of very low frequency (VLF) waves propagating in the earth-ionosphere waveguide, and leaking through the ionosphere to altitudes of 500-600 km. Amplitude-height, group delay, and polarization profiles are given for signals from a number of ground based transmitters. A coherent propagation model is proposed and partially tested by calculating Doppler shifts. The model, extended with a full-wave computer program, allows wave-field profiles to be approximated theoretically. The extent to which some sample calculations agree with the observations is discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 07, 1973
Accession Number
AD0767185

Entities

People

  • George C. Hirst
  • Paul A. Kossey
  • Richard B. Harvey
  • Robert P. Harrison
  • Vollie C. Fields

Organizations

  • Air Force Cambridge Research Laboratories

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Altitude
  • Amplitude
  • Computer Programs
  • Computers
  • Doppler Effect
  • Frequency
  • Ground Based
  • Ionosphere
  • Observation
  • Polarization
  • Transmitters
  • Very Low Frequency
  • Waves

Fields of Study

  • Physics

Readers

  • Space/Atmospheric Physics.
  • Wave Propagation and Nonlinear Chaotic Dynamics.