Determining the refractive index of the background medium in subsurface tomography

We propose a noncontact method for determining the mean refractive index of the medium in problems of subsurface tomography using ultra-wideband multi-position radio sounding in the case of a plane air-ground interface. The method is based on the computer oblique focusing of the radioimage of the sounded half-space containing buried objects. The proposed method does not require any a priori information on the position of the scattering objects in the medium. The feasibility of the proposed approach is verified experimentally.