Is a geophysical method that uses radar pulses to image the subsurface This nondestructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum.
What is that you ask?……
Well in simple terms GPR is just like a fish finder it sends a pulse into the ground and bounces back up any subsurface structures.
GPR can have applications in a variety of ground conditions, including rock, soil (wet or dry), ice and pavements. In the right conditions, certified locators can use GPR to detect subsurface objects, such as water mains that are PVC, gas mains which are poly and even concrete pipes, plastic storm water services and unknown services that you didn’t know were there. GPR uses high-frequency (usually polarized) radio waves, usually in the range 10 MHz to 2.6 GHz.
A GPR transmitter and antenna emits electromagnetic energy into the ground. When the energy encounters a buried object or a boundary between materials having different permittivities, it may be reflected or refracted or scattered back to the surface. A receiving antenna can then record the variations in the return signal. The GPR that Locate The Pipes uses can also take screen shots of the job and give you a depth on where that service you are trying to find is.