The FCC has mandated that GPR must operate below 960 MHz or in the frequency band 3.1-10.6 GHz and a GPR system can only operate when in contact with or in close proximity to the ground for the purpose of detecting and imaging subsurface anomalies, such as buried objects, sinkholes or underground caves and fluctuations in the earth’s composition. The FCC has limited GPR operation to law enforcement, fire and rescue organizations, scientific research institutions, commercial mining companies and construction companies.