IMPROVEMENT OF SIGNAL‐TO‐NOISE RATIO IN RESISTIVITY PROFILES¹

Abstract

ABSTRACT The cross‐correlation technique for increasing the anomaly‐to‐noise ratio is applied to the interpretation of resistivity profiles. To verify the method theoretically, resistivity profiles above a body having the shape of a parallelepiped were simulated with correlated and uncorrelated noise. Seven different electrode geometries are discussed. As a practical test, we considered profiles of a geoelectrical survey to locate tombs at a site of archaeological interest. When the shape and dimensions of the anomaly can be foreseen, the cross‐correlation method can be applied and it gives a substantial improvement in the signal‐to‐noise ratio.