Gradient and Polarization Methods of Ground-Based Monitoring of Magnetospheric Plasmaстатья
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Дата последнего поиска статьи во внешних источниках: 4 августа 2021 г.
Аннотация:The methods of an unambiguous determination of thr: parameters of the magnetospheric resonator (resonance frequency, its meridional gradient, and width of the resonance) by studying the spatial structure of ULF waves, in the Pc3-4 frequency range, are summarized and reviewed. The methods considered are the gradient technique (synchronous measurements of ULF field at two nearby stations) and the polarization method (multicomponent observations at one station). Both methods are experimentally tested using the data from an experiment at low latitude (L congruent to 1.5). Taking into account modifications of the structure of the ULF magnetic field due to geoelectric inhomogeneities, both methods demonstrate consistent results and are in a qualitative agreement with theoretical predictions. These methods should provide a useful tool for monitoring resonant frequencies and the distribution of plasma in the magnetosphere.