Ground penetrating radar (GPR) is a shallow, high-resolution geophysical method that uses high-frequency, pulsed, electromagnetic waves to image the subsurface. A GPR unit transmits electromagnetic energy into the ground which is reflected, refracted, or scattered back to the surface depending on the features it encounters (such as changes in geologic media or buried objects). Typically GPR is limited to depths of approximately 10 meters, but in highly resistive subsurface materials, such as ...
