What is GEORADAR?

Short definition:
A device that sees underground. Such a ground sonar. The depth range and resolution determine the frequencies of the antennas used. The more diverse the properties of underground structures, the more clearly they are distinguishable by georadar.

Long definition:
A device, basically consisting of a generator (transmitter) of short electromagnetic pulses which are transmitted to the ground and a receiver capable of recording these pulses in the widest possible spectrum. The time of reflections and their phase shifts shall be recorded. Pulses are transmitted and received using antennas, which are usually designed to specific frequencies. It is true that the lower the frequency of the antennas, the greater the depth range, but at the same time the resolution decreases. When choosing the appropriate antennas for a given survey, it is usually a compromise between the depth range and the required resolution. There is also a need for a device (computer), by which it is possible to set the measurement parameters and to record the measured values by the receiver. The output of the measurement is a radarogram.

What is RADARGRAM?

Radargram is a graphical 2D representation of measured values by georadar. Using an analog-to-digital converter, the received electromagnetic pulses are converted into digital form. Using the evaluation program, the individual reflections are assigned specific colors. The greater the difference in material properties, the more contrasting the color transition. All anomalies are thus manifested in a homogeneous environment by contrast color transition. The larger the searched object is and the more different it is from the surrounding environment, the better it is recognizable in the radargram.

Georadar application

Pre-construction survey
• location of cavities, buried cellars
• localization of older foundations of buildings
• searching for utilities and older excavations
• Determining the levels of individual soil layers
• determination of the level of the bedrock
• finding of geological faults
• route lines under rivers
• setting safe routes for horizontal drilling and extrusion
• Detection of unknown objects in the purge route

Search for utilities
• plastic gas pipes
• metal, plastic water and drain pipes
• Ceramic and concrete drain channels
• telecommunication optical cables
• Other metal pipes and cables of all types

Inspection and exploration of underground and underwater structures
• concrete objects - distribution of metal fittings
• condition of the subsoil under the roads - cavities, thicknesses of subsoils
• measuring of landslides and roadside
• buried black landfills and tripods
• lost barrels with hazardous chemicals
• Hidden objects, forensic research
• Search for old ammunition
• mapping of objects for archeology
• Determination of depths and deposits in rivers
• measuring the degree of mud in ponds
• finding sunken objects