Evaluation of the GPR Effectiveness from the Results of Measurement of Dielectric Properties of Soils

The work considers the depth evaluation of Ground Penetrating Radar (GPR) surveys using the attenuation factor of electromagnetic radiation in a medium. A method of determining the attenuation factor of low-conductive non-magnetic soils is developed based on the results of direct measurements of permittivity and conductivity of soils in the range of frequencies used in the practice of GPR. The method relies on measuring the shift and width of the resonance line after a soil sample is placed into a tunable cavity resonator. The advantage of this method is the preservation of soil structure during the measurement.