As well as GPRplus™ , Terravision Exploration offers expertise in using traditional, higher frequency, GPR systems. GPR systems measure the signal strength of reflected electromagnetic pulses transmitted into the subsurface. A pulse is a travelling disturbance (of the electromagnetic field) in the sub-surface and is reflected at interfaces between contrasting mediums. As such GPR is often used to identify material changes not visible at surface.

When investigating the near surface (0-2m), these traditional systems are preferred over deeper GPR units as they provide higher resolution of sub-surface objects such as small utilities and pavement assessment etc.