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The surface measurements cannot found small size targets and thin layer which are buried very deep. However, these targets can be found by hole-to-hole and surface-to-borehole measurements. In this study, comparison of two (pole-pole), three (pol-bipol, bipol-pol) and four (bipol-bipol, pol-Tripol) electrode array's signal contribution sections.In addition, we investigated that ratio of distance between holes and hole length.