EVALUATION OF THE EFFECTIVE CONDUCTIVITY OF THE UNDERLYING SURFACE ACCORDING TO THE RESULTS OF RECEIVING ELECTROMAGNETIC FIELDS IN THE MIDDLE ZONE OF THE ACTIVE SOURCE IN THE EARTH-IONOSPHERE WAVEGUIDE
St. Petersburg Branch of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences
Journal: Science and technological developments
Keywords: ELF, radio wave propagation, impedance, electromagnetic field, conductivity
Аnnotation: Experimental studies of signals from a controlled source in the middle zone under various geophysical conditions have been performed. In the experiment, five field electromagnetic components were measured in the range 0.3-95 Hz. Based on these observations, the effective conductivity of the underlying surface was calculated and an interpretation of the results was given.