Evaluating The Effects Of Magnetic Susceptibility In Uxo Discrimination Problems

Abstract

Past unexploded ordnance (UXO) clearance projects have demonstrated that the ability to detect<br>UXO can be seriously hindered by the presence of magnetic rocks and soils. In particular, magnetic<br>material affects the decay curve characteristics in electromagnetic surveys and this can adversely affect<br>inversion calculations that try to estimate parameters of the UXO or answer the question of whether<br>the item is UXO or scrap. Our research is in two parts. Firstly, we carry out numerical 1D forward<br>modelling to evaluate the distortions of signals due to laterally uniform magnetic material. In the second<br>part of the talk we examine how the distortions in the signal affect our inversion algorithms used for<br>UXO discrimination.