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WHAT GEORADAR And its operating principle
GPR (georadar) survey made using a special tool – GPR, which is an electronic device. GPR researchers receive continuous incision of the environment in which the diagnosis is made. Depth study there may be up to 20 meters. Examining the data record is to a file, which allows further conduct research and documentation material using computer equipment.
The operating principle of GPR entirely based on radar: radiation and fixing reflected electromagnetic pulses. Pulse produced by the device and using the transmitter (antenna) is sent to the studied environment. The medium may be any material as concrete, soil, brick wall, etc. The medium may be non-uniform structure, and that reflects the device. On the basis of these studies revealed a variety of voids and inclusions of other materials.
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GPR survey carried out by means of GPR. Ground penetrating radar – is a mobile electronic geophysical instrument that yields a continuous section of the investigated medium and write it to a file for further processing, analysis and documentation.
The principle of operation is based on the method of GPR radar: radiation sensed medium electromagnetic pulses and echoes from registration irregularities and objects in the interior environment. Such a method is a method of non-destructive investigation and control.
GPR frequency probing pulse ranges from 25 MHz to 3 GHz, the wavelengths lie in the test environments ranging from a few centimeters to several meters. Resolution GPR depth studies – better than a half wavelength and can be improved in the field of mathematical processing of the material.
Depth of GPR research depends on the frequency of the probe pulse and is about 25 meters in the “light” for GPR soil with a dielectric constant of 3-6 and 1-2 specific attenuation dB / m (dry sand, limestone, rocks, frozen ground). In loamy soils decreases the depth of investigation. Depth of investigation can be greatly improved by applying to the processing of field data specialized computer algorithms to recognize the useful signals in noise radarogram.
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