ELECTROMAGNETIC SIGNAL PROPAGATION INTO IONOSPHERE FROM THE RADIATING GROUNDED DIPOLE OF THE ERGU-600-2 ELECTRIC PROSPECTING GENERATOR FACILITY (NORTHERN TIEN SHAN)

The physical mechanism of propagation of the electromagnetic field disturbance generated by the electric prospecting generator facility ERGU-600-2 located at the Bishkek geodynamic test site of the Research Station of the Russian Academy of Sciences in Bishkek (Kyrgyzstan) into the lower ionosphere is investigated. Within the framework of a simplified model of the medium and the radiation source (grounded dipole powered by the ERGU-600-2 facility), analytical expressions were obtained for the frequency and spatiotemporal distributions of the electromagnetic field components. The numerical results demonstrate that the amplitude of the electric field disturbance in the ULF range at an altitude of 70 to100 km reaches several μV/m. To verify the numerical results on the territory of the Bishkek geodynamic test site, field measurements of the full geomagnetic field vector were carried out at various distances from the radiating dipole during the ERGU-600-2 operation sessions. The results of field measurements are consistent with the results of numerical studies, which allows to apply the proposed numerical method for assessing the electromagnetic pollution of the environment during the operation of man-made sources such as the ERGU-600-2 + dipole system.