3D-Radar

3D-Radar makes is possible to quickly and efficiently create a 3D image of the subsurface. T&A Survey officially represents the 3D Radar in the Netherlands, Belgium and Luxembourg.

Ground penetrating radar is an electromagnetic reflection technique which quickly and with great accuracy maps the top meters of the sub-surface in a non-destructive way. This geophysical technique is mainly used for locating  objects and layers in the ground. The ground penetrating radar is extremely accurate.

Principles of measurement
Ground penetrating radar uses electromagnetic waves transmitted into the subsurface by an antenna. When the characteristics of a material change, these waves are being reflected in the ground or in a construction. The reflected waves are registered by a receiving antenna. Both metal and plastic objects reflect the waves, making the detection of both kinds of material possible.

Execution of measurements
In many occasions the equipment is attached to a vehicle, but it can also be moved by hand. The technology is most suitable for surveys of a large areas without obstacles on the surface, for example the detection of objects under a railway, mapping the ballast bed on a railway or mapping the thickness of asphalt or the base and sub-base of tramways, roads and dikes.

Advantages of the 3D Radar
  • More measurements in both horizontal and vertical direction compared to other measuring technologies.
  • Because the 3D-Radar works with several frequencies at the same time, it is possible to zoom in on various depths.
  • Because of the width of the equipment  (1.5 to 2.5 meters) a much bigger area can be measured in one survey line.

The result is a detailed 3D image of the subsurface.