Geophysical Electromagnetic Sounding Using HAARP

Abstract

The electrical resistivity of the ground can be measured by several methods. One, which has proven useful, is the controlled source magnetotelluric method (CSAMT). Current over a wide range of frequencies is introduced into the earth through a grounded dipole. Then the resulting electric and magnetic fields are measured at a distance greater than several skin depths. The apparent resistivity is then calculated by: p = 1/5f E/B(exp 2) The apparent resistivity vs. frequency can be converted into true resistivity vs. depth, This grant involved an investigation into the HAARP virtual antenna pattern out to 200 km, and its use as a CSAMT transmitter.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2002
Accession Number
ADA399992

Entities

People

  • Davis D. Sentman
  • Eugene M. Wescott

Organizations

  • University of Alaska Fairbanks

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Computers
  • Crystal Oscillators
  • Data Analysis
  • Detection
  • Electrical Conductivity
  • Electrodes
  • Electromagnetic Fields
  • Engineering
  • Environmental Monitoring
  • Frequency
  • High Resolution
  • Ionosphere
  • Magnetic Fields
  • Magnetometers
  • Measurement
  • Test And Evaluation

Readers

  • Astronomy and Astrophysics.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Plasma Physics / Magnetohydrodynamics