Thinned arrays for ground penetrating imaging radar

In this paper, the effects of receive antenna placement on image formation in a surface contact synthetic aperture radar are investigated from an experimental perspective via the analysis of high frequency ground penetrating radar data. A receive array containing 121 measurements is used to form a baseline image of subsurface features including horizontal tunnels or drifts to depths approaching 200 feet. This result is compared to images formed using far fewer spatial measurements (as few as 37 samples out of 121 measurements available) collected randomly from throughout the same field of view.