Whereas. In case of a ground penetrating radar, The GPR transmits a very short pulse of e.m. energy into the material by a transmitting antenna at a wide range of higher frequencies in comparison to a pipe & cable locator . Energy reflected by discontinuities is captured by a receiving antenna. Depth range & resolution are related to the radar frequency, transmitted power, host material e.m. properties and to the shape and characteristics of the targets. The above combined with specialised electronic controllers allow Differences in dielectric properties between two adjacent materials through which the radar wave propagates to be captured allowing detection of both metallic and non metallic utilities.
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