The electromagnetic response of a heterogeneous layer modeled by two thin sheets in a uniformly conducting half-space

Limitations of the thin-sheet method introduced by Price (1949) are pointed out. It is shown that the variety of structures that can be modeled with the thin-sheet technique can be increased by modeling a heterogeneous layer with two thin sheets. One sheet is located on the surface and represents the upper portion of the thickness of the anomalous region, and the second sheet is embedded in the Earth and represents the lower portion of the thickness of the anomalous region. Numerical results are obtained for a representative model using both one and two thin sheets, and the results are compared. Numerical results are obtained for a representative model for both the exact and the approximate dual-thin-sheet model