Effect of Electrode Contact Resistance on Electrical Field Measurements

Electrical exploration on frozen or stony soil is associated with high difficulties in achieving good quality of electrode grounding. In such conditions, the results of high-frequency electric field measurements are often biased due to capacitive leakages in the receiving dipole and voltage division in the measuring circuit. This paper presents quantitative estimates of the maximum allowable surveying parameters, with which these distortions can be neglected. The authors provide a brief description of currently existing methods of solving the problem of poor grounding conditions, and offer a new method of full analytical correction of distorted data.