Accession Number : AD0779288

Title :   Effective Earth Conductivity Measurements at the Wisconsin Test Facility During the Summer of 1973.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CONN NEW LONDON LAB

Personal Author(s) : Bannister,Peter R. ; Canfield,Grayson R.

Report Date : 06 MAY 1974

Pagination or Media Count : 24

Abstract : From 15 July through 4 August 1973, the Naval Underwater Systems Center measured the effective earth conductivity beneath the four halves of the Wisconsin Test Facility (WTF) antennas. The H/I induction method of conductivity measurements was used with each half-antenna alternately employed as the source, and some measurements were also obtained with the full-length N-S and E-W antennas as sources. The principal results are that (1) the minimum distance for determining the effective earth conductivity by the H/I method is 7 effective earth skin depths, and (2) the method of measuring each half-antenna in order to predict the effective conductivity of the whole antenna is correct within a factor of 1.22. (Author)

Descriptors :   *Geophysical prospecting, *Telluric currents, Electrical conductivity, Earth crust, Geomagnetism, Wisconsin

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE