Evelopment of deep georadiolocation

In geophysics, in the electrical exploration section, the georadiolocation method of subsurface radiosonding, abbreviated as georadar, has become widespread over the past 45 years. This non-contact measurement method based on the propagation and reflection of electromagnetic waves has advantages over classical methods of electrical exploration, expanding the scope and detail of research. The non-contact method of measuring with ground-penetrating radar allows measurements to be carried out at a certain distance from the surface of the device. The fields of application and the depth of research of GPR radars from various manufacturers are shown. The theory of calculating the limiting depths of georadiolocation based on Maxwell's formulas related to the frequency and conductivity of rocks is presented, formulas are given and graphs are constructed indicating the convergence of calculations using the classical adapted radar formula for semi-conducting rocks. The calculations of the limiting depths were performed using the classical radar formula adapted for calculations in semi-conducting rocks with different linear attenuation, and graphs were constructed. The numerical values obtained are compared with the results of practical work confirming these calculations. Over the past 15 years, Russian manufacturers have made a breakthrough in the manufacture of low-frequency ground-penetrating radar with high-power transmitters based on domestic gas-filled arresters, significantly expanding the depth and scope of application in the search for minerals. Based on theoretical calculations and experimental data, the frequency is divided into classical high-frequency (shallow-depth) and low-frequency (deep-depth) ground-penetrating radars. The influence of the characteristics of various rocks on the results of subsurface radiosonde is shown.