Multilayer Stolt Migration Algorithm for Subsurface Target Imaging in Oblique Layers

A generalized multilayer Stolt migration (MULSM) method has been developed. The conventional MULSM method can refocus images of buried targets in a layered geometry, but only where the boundaries between the layers are parallel to the air-ground interface. The newly developed algorithm can be applied to an obliquely layered geometry by taking into account the refraction between the layers. Related equations for the method are derived and validated through numerical and experimental investigations. The images refocused by the proposed method are shown to match the actual target positions.