Georadar (Ground-Penetrating Radar, GPR) is a non-destructive AND UNINTRUSIVE modern geophysical system (it does not require any in situ sample taking) that is applied in archaeological and/or technical searches to locate and define the spatial position of objects and structures in the subsoil. GPR scans the structure of the terrain using electromagnetic pulses and detects DIFFERENT technical, cultural, archaeological or anthropological structures by comparing and contrasting their dielectric field and their conductivity..
Examination of soil composition IS CARRIED OUT with a GSSI UtilityScan georadar equipped with 400 Mhz and 900 Mhz aerials. The aerials are handled on the ground at a speed of 0.5 m/s which enables data to be obtained every 2 cm. by positioning them directly above the surface using an all-terrain cart.
Maximum detection depth for this equipment, under normal circumstances, is 6 metres. Processing and interpretation of radargrams is performed using RADAN software, which enables digital filtering to be undertaken (FIR, IIR, space filter, Migration, Reconvolution, Hilbert Transform, etc.) and present data on many different planes and formats, including 3-D.
GPR is the most successful modern method in non-invasive subsurface research, without the need for undertaking excavations or any other type of destructive intervention. For this reason, it is an environmentally-friendly method and is excellent for project planning and development stages. In addition, it does not need to establish physical contact of any kind (electrodes) with the soil, it is fast and easily applied in all environments.