Zalizovs'kyj A. Radio frequency techniques for the diagnostics of hydromagnetic waves and the terrestrial plasma.

The investigations of space plasma by the radio physical methods, with the use of the geomagnetic Pc3/Pc4 pulsations in the capacity of sounding signals have been carried out. The method of ionosphere radar magnetometry is developed. New techniques have been proposed for estimating the MHD waves reflection coefficients from the ionosphere and height-integrated ionospheric conductivities. Two types of diurnal variations have been revealed and interpreted for the tilt angle of the polarization ellipse of geomagnetic pulsations measured at the Antarctic station "Akademic Vernadsky". As has been shown, ground based measurements of the geomagnetic pulsations can be used for estimating ionospheric conductances and the spatial spectrum of hydromagnetic waves.