Imaging by joint inversion of electromagnetic waves and DC currents

Geophysical electromagnetic imaging methods are a proven cost effective, non destructive and accurate way of determining material properties and mechanisms in the shallow subsurface of the Earth (approximately the first 100 [m] in depth from the air-ground interface). Like every geophysical method, physical limits on source-receiver positioning for acquiring observations makes these imaging methods highly ill posed and often regularization schemes are used in order to constrain the problem. In order to mitigate biased regularization, we propose to investigate a joint inversion of ground penetrating radar (GPR) and electrical resistivity (ER) data that honors the physics of the imaging experiments and solves for electric permittivity and electric conductivity simultaneously by letting both data sets cooperatively regularize each other.