How Does GPR Work?

How do you figure out what’s beneath the surface without digging? Ground-penetrating radar (GPR) uses radio waves to “see” below the subsurface.GPR (Ground Penetrating Radar) machine

During a GPR scan, a cart – which can resemble a push lawn mower – is wheeled back and forth in a systematic grid approach across the area in question.

A GPR transmitter on the cart emits electromagnetic energy into the ground. 

GPR relies on high-frequency, polarized radio waves. When the radio waves encounter an object or a boundary between materials, it may be reflected, refracted or scattered back to the surface.

Using a receiving antenna, variations can then be recorded. The result is a map of what’s beneath the surface.

GPR can locate utilities that don’t conduct a current (such as plastic, concrete or PVC piping) and can’t be picked up by other methods, such as EM (electromagnetic) locating. 

Ground-penetrating radar is ideal for detecting anomalies in the subsurface. The technology can detect ground voids, buried structures, water and sewer lines, unmarked gravesites and more.

For more information or to find out how ground-penetrating radar can work for you, contact GPR Arkansas & Geotechnical Services LLC.


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