Inversion of soil´s and immersed objects´s electromagnetic parameters symultaneously

This paper presents results of numerical simulation and algorithm of simultaneous inversion of soil´s and immersed object´s electromagnetic parameters. Inversion is performed from data of electromagnetic induction (EMI) sensing, when all other geometric parameters of the problem are known. Discrimination procedure of subsurface objects such as landmines and unexploded ordnances (UXO) accomplishes higher accuracy when mentioned parameters are determined a priori. A specially, when interaction effects between object its surrounding media is significant and there is no exact information about materials of UXO produced in different time. Combining Method of Auxiliary Sources (MAS) with Gauss-Newton minimization algorithm, we developed optimization methodology that simultaneously inverts for the EM parameters of both the object and the surrounding medium.