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The effect of (a) profile angle β with respect to the strike, and (b) the limited strike extent of a vertical sheet conductor on the response of one loop transient induction method was studied by physical modelling. The results indicate that 95% of the maximum response can be obtained when β = 85°, while at least 40% of the maximum response can be obtained if the edge of the sheet conductor is covered by 0.5 L of the loop.