Numerical integration for reducing degree of generated noise

Interpretation of TDEM sounding data is commonly done using the S-layer differential transform. This method is<br>based on the thin sheet model. In this method, the first and second time derivates of the magnetic field are solved<br>simultaneously for the conductance (S) and depth (d). Taking the derivatives of S to d then yields the conductivity<br>of an equivalent S-layer and depth d.