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Просмотр по автору "Akchurin A."

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An application of sector equipment of acoustic logging VAK-32 for research of oil wells

Kosarev V.; Gorgun V.; Akchurin A.; Yusupov K.; Smirnov G.; Gorbachev V.; Mikheev M. (2016)

The processing of research results of sector equipment of acoustic logging in the carbonate section was carried out taking into account the separate registration of wave patterns into four independent spatial sectors. It ...
Calculation of midlatitude sporadic E group delay as function of frequency

Akchurin A.; Bochkarev V. (2011)

The deep quasiperiodic variations in the part of frequency dependence of amplitude of reflections from layer Es observed by Kazan ionosonde was discovered. The analysis of height location of traces in an ionogram has shown ...
Comparison of electron densities and temperatures on satellite in situ measurements and ground remote ob servations

Smirnov G.; Akchurin A. (2019)

© 2019 IEEE. To determine the degree of connectivity of the electron density disturbance of the MSTID type below and above the F layer peak, a comparison data of the ionosonde and the low-orbit constellation of the Swarm ...
Determination of sporadic e radio wave propagation parameters based on vertical and oblique sounding

Sherstyukov O.; Akchurin A.; Sherstyukov R. (2015)

© 2015 COSPAR. Published by Elsevier Ltd. All rights reserved. Sporadic E layer is often determined for HF radio communication. We have to deal with oblique radiowave propagation in the radio practice. The limiting frequencies ...
Diagnostics of artificial ionospheric irregularities using short sounding radio paths

Bolotin I.; Frolov V.; Akchurin A.; Zykov E.; Yusupov K. (2012)

In this work, we consider the possibilities of diagnostics of artificial ionospheric irregularities with the transverse size l⊥ ≈ 50-200 m, which are excited in the Earth's ionosphere by highpower short-wave radio-frequency ...
Effect of the dynamics of the regular ionosphere on the conditions of existence of group delay resonances during vertical radiosounding

Akchurin A.; Bochkarev V. (2004)

The effect of the regular diurnal variations in the nonmonotonous model Ne(h) profile with a valley between the E and F layers on the conditions of existence of group delay resonances has been studied. The performed ...
Effect of the sporadic E layer on propagation of metric and decametric radiowaves on short paths

Sherstyukov O.; Minullin R.; Akchurin A.; Nazarenko V.; Sapaev A.; Zykov E. (2000)

The effect of the sporadic Es layer on radiowave propagation is established on the basis of studies carried out on the short midlatitude path Moscow-Kazan in a wide frequency range by simultaneous sounding at a sliding ...
Effects of planetary waves in parameters of the midlatitude sporadic E layer

Zykov E.; Sherstyukov O.; Akchurin A. (2009)

The spatial structure of the planetary waves in the frequency parameters of the sporadic E layer have been studied based on an analysis of the 30-year series of the ionospheric data for the midlatitude region of the Northern ...
Features of observing for weak MSTIDs by GNSS satellites

Sherstyukov R.; Akchurin A.; Sherstyukov O. (2019)

© 2019 URSI. All rights reserved. To analyze the weak midlatitude medium-scale travelling ionospheric disturbances we use the sufficiently dense network of GNSS receivers (more than 150 ground-based stations). We show the ...
Formation of artificial plasma disturbances in the lower ionosphere

Bakhmet'eva N.; Frolov V.; Vyakhirev V.; Kalinina E.; Bolotin I.; Akchurin A.; Zykov E. (2012)

We present the results of experiments on sounding the disturbed ionospheric region produced by the high-power RF radiation of the "Sura" heating facility, which were performed simultaneously at two observation points. One ...
Frequency dependences of reflection coefficient from Es layer at oblique incidence

Sherstyukov O.; Akchurin A.; Sherstyukov R. (2011)

For radio communication practice it is expedient to establish interrelation of level of the signal reflected radio waves from the Es layer at oblique incidence, with values of frequency parameters defined at vertical ...
Generation of Artificial Ionospheric Irregularities in the Midlatitude Ionosphere Modified by High-Power High-Frequency X-Mode Radio Waves

Frolov V.; Bolotin I.; Komrakov G.; Pershin A.; Vertogradov G.; Vertogradov V.; Vertogradova E.; Kunitsyn V.; Padokhin A.; Kurbatov G.; Akchurin A.; Zykov E. (2014)

© 2014, Springer Science+Business Media New York. We consider the properties of the artificial ionospheric irregularities excited in the ionospheric F2 region modified by high-power high-frequency X-mode radio waves. It ...
Gyroharmonic features of the hf-induced ionospheric irregularities

Frolov V.; Bolotin I.; Komrakov G.; G.vertogradov G.; Vertogradov V.; Vertogradova E.; Akchurin A.; Bochkarev V.; Dresher A.; Zykov E.; Katypov R.; Petrova I.; Yusupov K.; Kunitsyn V.; Padokhin A.; Kurbatov G. (2012)

Gyroharmonic features of the different-scale artificial plasma-density irregularities excited by HF modification of the ionospheric F2 region under conditions where the frequency of the O-mode pump wave is close to the ...
Improved precision of virtual height measurements with coherent radio pulse sounding based on the maximum likelihood method

Akchurin A.; Bochkarev V.; Ryabchenko E.; Sherstyukov O. (2009)

The paper describes a new technique that improves precision of the virtual height measurements by a coherent pulse sounding of the ionosphere. Proposed technique is based on the method of maximum likelihood that matches ...
Influence of Horizontal Ionosphere Nonuniformity on the Spatial Distribution of Ultralow-Frequency Magnetic Fields from Ground-Based Sources

Ermakova E.; Pershin A.; Ryabov A.; Schennikov A.; Akchurin A. (2019)

© 2019, Springer Science+Business Media, LLC, part of Springer Nature. A significant difference was found in the amplitude and polarization spectra of ULF magnetic noise at stations with a base of 120 km during periods of ...
Interpretation of deformed ionograms induced by vertical ground motion of seismic Rayleigh waves and infrasound in the thermosphere

Maruyama T.; Yusupov K.; Akchurin A. (2016)

© 2016 Author(s).The vertical ground motion of seismic surface waves launches acoustic waves into the atmosphere and induces ionospheric disturbances. Disturbances due to Rayleigh waves near the short-period Airy phase ...
Interrelation of traveling ionospheric disturbances above and below the f-layer peak according to the ionosonde and the swarm constellation data

Akchurin A.; Smirnov G. (2019)

© 2019, Kazan Federal University. All rights reserved. One approach to determining the height structure of the mid-latitude medium-scale travelling ionospheric disturbances (MSTIDs) above the F layer peak is to involve ...
Ionosonde tracking of infrasound wavefronts in the thermosphere launched by seismic waves after the 2010 M8.8 Chile earthquake

Maruyama T.; Yusupov K.; Akchurin A. (2016)

© 2016 American Geophysical Union. All Rights Reserved.Ionospheric disturbances associated with the M8.8 Chile earthquake (35.91°S, 72.73°W) on 27 February 2010 were observed at Kazan, Russia (55.85°N, 48.81°E). Rapid-run ...
Isolation of the Small-Scale and Weak Medium-Scale TIDs on Daytime Midlatitude Ionograms

Akchurin A.; Smirnov G.; Ildiryakov V. (2021)

A simple indicator has been introduced to detect weak mid-latitude TIDs in ionograms. This indicator is based on the differential rotation of the cusp part of the trace of the F layer. This approach turned out to be much ...
Modeling and experimental observations of radio wave propagation by reflection from the Es-layer at short radio-lines

Sherstyukov O.; Akchurin A.; Latipov R.; Sherstyukov R. (2014)

© 2014 IEEE. These The effects of focusing and defocusing at radiowave propagation through the Es-layer are frequently obtained. The large-scale cloud structure of Es layer was used to explain the effects of radiowaves ...

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