What is a ground penetrating radar?

It was not long ago, when objective methods for continuous ground surveying and showing its structure, including the whole subsurface infrastructure, such as pipes, cables or concrete constructions, did not exist. Despite the fact that the pioneer radar operated already in 1929 (!) in Austria, first models appeared on the market as late as the 1970s.

All currently applied measurement methods yield better or worse representation of the real world. For example, hole-drilling method – considered the most reliable up to now – represents the real structure of an area being surveyed only in a small degree, because it is a point method. Thus, we have 100% of the information only in places, where holes were drilled, however, we do not have any information of the area between bore-holes.

The moment the GPR (ground penetrating radar) was handed over to a wider range of users, scientists and practitioners received a tool, which permits to yield very precise linear – not point – cross-sections of the ground, including the information on objects located close to the ground surface, such as cables, pipes, tunnels, etc. Furthermore, the interpretation of the obtained data permits to determine not only the depth, volume and shape of objects, but also the material, from which they were produced, and many more.

Surveys using the GPR can be carried out on the ground, from the air, on and under water, on marshy grounds, on the snow and steep slopes – everywhere a man can walk or swim through and where the antenna can be dragged over, for example on a pontoon. Because the GPR surveying method is a non-invasion method (does not cause any damage to the environment), the GPR constitutes an indispensable work tool in almost all conditions.