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Geomagnetic micropulsations and diagnostics of the magnetosphere

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Abstract

Plasma oscillations in a wide range of spectrum exist in the magnetosphere. Part of them penetrate the ionosphere and are recorded on the earth's surface. In the range of frequencies from millihertz to several hertz, the so-called micropulsations (ULF) are observed. In the range from hundred of hertz to several kilohertz the low-frequency emissions (VLF) are registered. Both types of emissions contain interesting and important information on the physical parameters of the magnetosphere and on the processes developing in it. The following paper describes the main problems of the diagnostics of the magnetosphere, which are based on the surface observations of micropulsations.

In the first part of the paper, a short summary of theoretical conceptions on micropulsations is given. The main part of the paper describes the methods of diagnostics of the location of the boundary of the magnetosphere, of cold-plasma concentration in the outer regions of the magnetosphere, as well as of the energies and fluxes of fast charged particles in the geomagnetic trap. Some experimental results of the diagnostics of the parameters of the magnetosphere are given. Advantages and deficiencies of the existing methods of surface diagnostics are discussed, and the directions of further investigations are traced.

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  1. Borok Observatory, Institute of the Physics of the Earth, Academy of Sciences of the U.S.S R., Russia

    V. A. Troitskaya & A. V. Gul'elmi

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  1. V. A. Troitskaya
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Troitskaya, V.A., Gul'elmi, A.V. Geomagnetic micropulsations and diagnostics of the magnetosphere. Space Sci Rev 7, 689–768 (1967). https://doi.org/10.1007/BF00542894

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