Local variations of the cross-field transversal anisotropy orientation and drift direction in the F-region of the mid-latitude ionosphere

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Abstract

Analysis of fluctuations of the satellite radio-signals scattered on small-scale irregularities in F-region of the ionosphere and obtained recorded by a terrestrial ground-based receiver in Moscow showed has shown that often two or three maxima are present in the latitudinal profile of amplitude dispersion variance. The orientation of the cross-field transverse or transversal anisotropy of the irregularities was determined and compared with the drift direction obtained by the ionosonde DPS-4 using the LocalDrift program.

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About the authors

N. Yu. Romanova

Polar Geophysical Institute

Author for correspondence.
Email: romanova@pgi.ru
Russian Federation, Murmansk

V. A. Telegin

Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences

Email: romanova@pgi.ru
Russian Federation, Moscow

V. A. Panchenko

Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences

Email: romanova@pgi.ru
Russian Federation, Moscow

G. A. Zhbankov

Southern Federal University

Email: romanova@pgi.ru
Russian Federation, Rostov-on-Don

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Supplementary files

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2. Fig. 1. Examples of determination of anisotropy parameters by only one isolated maximum in the presence of additional ones, the height of which is close to the background level: experimental maximum in the plot of dispersion of the logarithm of relative amplitude (solid curve) and its approximation of the theoretical curve (circles) (a, c); mutual location on the sky map of ionospheric reflectors (grey points) and orientation of transverse anisotropy ΨA (ellipse) (b, d). The arrows in the centre of the figure are the drift direction calculated from the reflectors of the whole sky map (thick arrow) and from the reflectors in the local region (thin arrow). The boundaries of the local area are marked in black colour

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3. Fig. 2. Examples of determination of anisotropy parameters by three maxima (a, c) and mutual location on the sky map of ionospheric reflectors and ΨA in three observation areas of small-scale inhomogeneities (b, d). The notation is the same as in Fig. 1

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4. Fig. 3. Example of determination of anisotropy parameters by two maxima (a) and mutual location on the sky map of ionospheric reflectors and ΨA in two observation areas of small-scale inhomogeneities (b). The notation is the same as in Fig. 1

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5. Fig. 4. Histogram of differences between transverse anisotropy orientation ΨA and drift direction ΨD for 80 cases of comparison of these experimental data

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