Air-or vehicle-borne ground penetrating synthetic aperture radar(GPSAR) has the capability to detect landmines and landmine fields over large area from a standoff distance quickly

which is the trend of landmine detection.In order to reduce the false alarms in landmine detection

it is needed the design efficient detector on the electromagnetic characteristics between landmine and clutter.A 2-dimensional electromagnetic signature modeling method of subsurface metallic landmine in GPSAR is proposed

whose results fit real data collected by the Rail-GPSAR system.Electromagnetic modeling result shows that the image of subsurface metallic landmine has the two-peak characteristic

which will improve the landmine detection performance greatly.