Accession Number : AD0430719


Title :   INVESTIGATION OF ELECTRICAL CHARACTERISTICS OF ROCK MEDIUM ON CAPE COD,


Corporate Author : RAYTHEON CO NORWOOD MASS


Personal Author(s) : Tsao,Carson K H


Report Date : Dec 1963


Pagination or Media Count : 51


Abstract : Experiments were conducted on Cape Cod, Massachusetts, to investigate the electrical characteristics of the subsurface rock strata and various techniques related to the rock-propagated radio signals. Electrically short dipoles were placed in drill holes to determine the conductivitites of the rock media surrounding the drill holes and the attenuation by the overburden of distant VLF signals traveling through it from the surface of the ground to the rock. Propagation tests were made between antennas placed in two drill holes separated by a distance of 1 mile. By assuming the rock to be a semi-infinite medium and the overburden to be a perfect ground plane, the attenuation and phase constants of the rock medium were deduced independently and used to obtain the bulk conductivity along the path. (Author)


Descriptors :   *ROCK , PROPAGATION , ATTENUATION , WATER , SAMPLING , RADIO WAVES , RADIO FIELDS , INTENSITY , GAIN , EXPERIMENTAL DATA


Distribution Statement : APPROVED FOR PUBLIC RELEASE