Ground penetrating radar uses electromagnetic pulses to detect changes in subsurface materials and objects. Like seismic reflection, GPR sends a pulse of electromagnetic energy into the ground and reflects off subsurface objects or changes in conductive and dielectric properties of the underlying material. The resulting signal return is captured by the receiver antenna and displayed on the screen as a hyperbola-shaped trace. The distortions and contrast of the returned signal indicate the presence and size of a buried object or change in the underlying material.Read more :gpr-survey.uk
The maximum penetration depth of the radar system depends on the type of soil or rock and the frequency of the antenna used. Lower frequencies offer better penetration depth but less resolution, whereas higher frequencies provide greater resolution but less penetration depth. A GPR survey area can be scanned with a variety of frequencies and different antennas, depending on the investigation objectives.
Ground Penetrating Radar: A Non-Destructive Testing Technique
Typically, an antenna pair mounted on a pushcart is used to transmit radar pulses over a survey path. The signals reflect off of buried structures and the data gathered is read by a GPR technician to produce an image of the underlying material. GPR is a non-invasive and highly portable method with the highest lateral and vertical resolution of any surface geophysical method. For more information about how a ground penetrating radar can help with your project, contact us today! Our expert staff can answer your questions and assist with planning and preparing for your next utility location or buried structure investigation.