Models of (a) – homogeneous domain (Ω
) of specific resistivity ρ and (b) – a layered non-homogeneous domain (Ω
), consisting of a series of homogeneous layers of specific resistivities ρ
. Vertical (in the ZOY plane) and horizontal (in the XOZ plane) rectangular excitation coil contours are positioned on the upper surface (XOZ plane).