GPR is used for detection of buried structural remains, including building foundations, walls, floors and cavities.
The technique has a wide range of application, is effective on soil, tarmac and concrete surfaces, for survey at the interior of an historic church, to investigation of open fields for mapping buried foundations.
GPR systems comprise a configuration/data acquisition unit, single or multi-frequency antenna, and either a cart or survey wheel fixed with an odometer or GPS.
The system is used to transmit a continuous electromagnetic pulse or wave of energy into the ground and record reflections of that energy as it interacts with the objects and layers below surface. Reflections of the electromagnetic energy the system records at the surface are proportional to the conductive and dielectric properties of the layers and objects below.