Accession Number : ADA399992


Title :   Geophysical Electromagnetic Sounding Using HAARP


Descriptive Note : Final rept. 1 Sep 1997-30 Aug 2001


Corporate Author : ALASKA UNIV FAIRBANKS GEOPHYSICAL INST


Personal Author(s) : Wescott, Eugene M ; Sentman, Davis D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a399992.pdf


Report Date : Mar 2002


Pagination or Media Count : 14


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.


Descriptors :   *ELECTROMAGNETIC FIELDS , *GEOPHYSICS , *ATMOSPHERIC SOUNDING , ALASKA , ELECTRICAL RESISTANCE


Subject Categories : Atmospheric Physics
      Geology, Geochemistry and Mineralogy
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE