When earth conductivity measuring systems are operated near grounded conductors such as utility lines and railroad tracks, the coupling between the array and the parasitic element can lead to erroneous measurements for earth conductivity. The problem of parasitic line contamination is studied using theory and outdoor modeling with respect to three common techniques: Four Terminal Array, E/H Surface Impedance, and H/I Near Magnetic Field. Experimental measurements were found to agree ...
This study has direct application to the design of submerged dipole antennas. The hypothetical laboratory modeling system consists of a closed circuit water tunnel capable of simulating the electrodynamic and hydrodynamic properties of water at speeds up to 20 knots. Electrical noise quieting is achieved by shielding and correlation techniques. Only the test section of the water tunnel is shielded. Additional quieting is obtained by using coaxial electrodes. The simulator ...
Reports by Author
