Radiotomographic investigations of ionospheric structures at auroral and middle latitudesстатья
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Аннотация:The paper describes the experimental results of the ionospheric investigations by satellite radiotomography (RT) carried out in the last decade (1984-1994). The results of tomographic reconstructions using the diffractional RT, statistical RT and ray RT methods are represented. The methods and experimental techniques applied are briefly described. The tomographic sections obtained contain a great variety of the recovered structures: troughs of different shapes, local extrema, quasi-wave structures, finger-like structures, etc. Examples of reconstructed two-dimensional sections of isolated diffractive irregularities of kilometer dimensions as well as a reconstructed spectrum of electron fluctuations are given. Possible geophysical interpretations of the results and various approaches to RT reconstruction are discussed.