Accession Number:

AD0600758

Title:

INVESTIGATIONS OF ELECTRICAL CHARACTERISTICS OF ROCK MEDIUM IN NORTHERN NEW YORK STATE.

Descriptive Note:

Scientific rept. no. 3,

Corporate Author:

RAYTHEON CO NORWOOD MASS

Personal Author(s):

Report Date:

1964-01-01

Pagination or Media Count:

55.0

Abstract:

Measurements were made in drill holes located in several areas in northeastern New York State to determine the conductivity of the rock media surrounding the drill holes. Conductivities in the drill holes were deduced from the quarterwave resonance frequencies of insulated monopole antennas. Conductivity profiles in the holes were obtained from the input conductances of electrically short bare dipoles. At Mineville, New York, transmission tests over a 1-mile path were made between two drill holes. Propagation of signals were attributed to the path through the rock as opposed to that through the air. The average attenuation and phase constants of the rock medium along the path were obtained from the measured mutual impedances between antennas placed in the two holes. The bulk conductivity between the holes was deduced from these measurements. In the New York tests, the conductivity appeared to be about one order of magnitude less than that deduced for Cape Cod, AD-407 840, AD-430 719 with consequent decreased exponential damping loss for a given frequency or higher frequency for the same loss. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE