What is GPR?

What is GPR?

What is GPR?            

GPR typically uses signals in the microwave band between 10 megahertz (MHz) and 2.6 gigahertz (GHz). Its primary benefit is that it doesn’t require digging into the ground like traditional methods of subsurface study. Under the right conditions, GPR operators can use GPR to identify objects, and even underground near-surface voids.

A transmitter on the GPR devices emits EMR the GPR signal into the media.  An antenna on the GPR device receives signals that are reflected by the media and various objects within it. The GPR device then receives these return signals and displays them on a GPR data screen.

The effective depth of GPR is determined by several factors such as the media’s electrical conductivity, the frequency of the transmitted signal and its power. Higher frequencies are more easily blocked by material, making it more difficult for GPR to penetrate the media. Media with greater electrical conductivity allows the GPR signal o travel further, thus increasing its usable depth. For example, ice is highly conductive, allowing GPR to potentially penetrate a great distance. On the other hand, solid materials like granite don’t absorb water easily, limiting their penetration by GPR to much smaller depths.

How Does GPR Work?                

GPRS uses GPR as a non-destructive and safe method to locate utilities and to scan concrete for embedded objects.  GPRS does not use GPR for geological or geophysical purposes.  GPRS’ use of GPR typically involves placing the GPR device over a location to scan that location for objects.  If the GPR detects an object located in concrete, it will display information on the GPR data screen.  GPRS can use that information and other information, including information supplied by the customer, to supplement the information gained from the GPR device.  

Typically, GPRS uses the GPR to locate and then simply mark on the surface with chalk where a utility has been located.  GPR can be used the same way to locate objects in concrete; GPRS technicians use the GPR to locate the object in the concrete and then mark the surface with chalk where the GPR device located the object.              

What Does GPR Stand For?

GPR stands for ground penetrating radar.

What are the applications for GPR?                

GPR is used extensively to locate underground utilities. Additional applications of GPR include concrete scanning, where the GPR device can be helpful in locating rebar, post-tension cables, and other objects embedded in the concrete.              

What does GPR mean?                

GPR means that technicians can locate subsurface objects in situations where invasive testing is undesirable. This is especially true for tasks such as using GPR to locate utilities or objects embedded in concrete.


Ground Penetrating Radar Systems (GPRS) focuses on the tasks of locatingunderground utilitiesand scanning concrete, unlike the typical GPR company that offers multiple GPR services. GPRS does not use GPR for geophysical or geological purposes.  All of our project managers must complete our extensive training before they can perform field services on a customer’s site. Contact us today to learn more about we can help you find utilities on your site.

Note: GPRS does not provide geophysical, geological, land surveying or engineering services. If you need such services, please contact an appropriate professional.