Ground Penetrating Radar (GPR)

How does GPR work

The radar works by launching pulses of electromagnetic energy of a certain bandwidth into the ground under investigation. These pulses propagate through the ground and are reflected by sub-surface targets or at interfaces between different media. The radar measures the time taken for a pulse to travel to and from the target which indicates its depth and location. The transit time of the pulses depends on the dielectric constant properties of the material.

Img 1: Two utilities at 0.5m and 0.6m depth       &       Img 2: ERA SPRScan GPR systems

The benefits of using Ground Penetrating Radar GPR is able to detect metallic and non-metallic services such as polyethylene water and gas pipes as well as utilities such as fibre-optic cables which are not normally traceable using any other method. The combined abilities of GPR and electromagnetic principles enable the most accurate and complete underground survey to be provided.

Click to Read about a Typical example of GRP application.