Abstract
An approximate method of one-dimensional modelling of the plasma of the Earth's ionosphere is demonstrated for purposes of studying the ionospheric filtration of ULF waves (micropulsations). Apart from the basic local parameters, characterizing the plasma, also derived local characteristics have been defined, i.e. the mass of the so-called effective ion\(\bar m_i \) and its effective collision frequency\(\bar v_i \). Drawing on existing empirical models of the mid-latitude ionosphere, vertical profiles (50 km ≦ h ≦ 1000 km) were determined of the characteristics Ne ≈ Ni, ve,\(\bar m_i \) and\(\bar v_i \) for the daytime and nighttime mid-latitude ionosphere under low and enhanced solar activity, which can be used to study the ionospheric ULF filter.
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