Abstract
Motivated by applications in unmanned aerial based ground penetrating
radar for detecting buried landmines, we consider the problem of imaging
small point like scatterers situated in a lossy medium below a random
rough surface. Both the random rough surface and the absorption in the
lossy medium significantly impede the target detection and imaging
process. Using principal component analysis we effectively remove the
reflection from the air-soil interface. We then use a modification of
the classical synthetic aperture radar imaging functional to image the
targets. This imaging method introduces a user-defined parameter, δ,
which scales the resolution by √δ allowing for target localization with
sub wavelength accuracy. Numerical results in two dimensions
illustrateWe study imaging methods for identifying point targets in a
lossy medium below a random rough surface. the robustness of the
approach for imaging multiple targets. However, the depth at which
targets are detectable is limited due to the absorption in the lossy
medium.