Backscatter signal model for Irkutsk Incoherent Scatter Radar

Tashlykov, Viktor; Medvedev, Andrei V.; Medvedev, Andrey; Васильев, Роман; Vasilyev, Roman

doi:10.12737/stp-42201805

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…Ion Ti and electron Te temperatures (Figure 3, c, d) at different heights were obtained from IISR data, using the technique described in [Tashlykov et al, 2018]. Te hardly deviated from its quiet diurnal variation during the April 12-15, 2016 geomagnetic storms (Figure 3, d).…”

Section: Ionospheric Disturbancesmentioning

confidence: 99%

Ionospheric Disturbances Over Eastern Siberia During April 12–15, 2016 Geomagnetic Storms

Rubtsov

Maletckii

Danilchuk

et al. 2020

Solar-Terrestrial Physics

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We present the results of the complex study of ionospheric parameter variations during two geomagnetic storms, which occurred on April 12–15, 2016. The study is based on data from a set of radiophysical and optical instruments. Both the storms with no sudden commencement were generated by high-speed streams from a coronal hole. Despite the minor intensity of the storms (Dst ≥ –55 and –59 nT), we have revealed a distinct ionospheric response to these disturbances. A negative response of electron density and F2-layer critical frequency was observed during the main phase of both the storms. The amplitude of the negative response was higher for the second storm. The period of negative electron density deviations was accompanied by an increase in the peak height, as well as by the downward plasma drift in the evening and night hours, which is not typical of quiet conditions. We have also recorded sharp peaks in the AATR (Along Arc TEC Rate) index and in total electron content noise spikes on average 2–2.5 times. This indicates an intensification of small-scale ionospheric disturbances caused by disturbed geomagnetic conditions and high substorm activity.

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Section: Ionospheric Disturbancesmentioning

confidence: 99%

Ionospheric Disturbances Over Eastern Siberia During April 12–15, 2016 Geomagnetic Storms

Rubtsov

Maletckii

Danilchuk

et al. 2020

Solar-Terrestrial Physics

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“…Our statistics show that the amplitude of most traveling ionospheric disturbances do not exceed 10%. Variations in the ion temperature (close to the neutral temperature) in the IGW period range are typically of the order of some percent [20].…”

Section: Introductionmentioning

confidence: 99%

Method for Determining Neutral Wind Velocity Vectors Using Measurements of Internal Gravity Wave Group and Phase Velocities

et al. 2019

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This study presents a new method for determining a neutral wind velocity vector. The basis of the method is measurement of the group velocities of internal gravity waves. Using the case of the Boussinesq dispersion relation, we demonstrated the ability to measure a neutral wind velocity vector using the group velocity and wave vector data. An algorithm for obtaining the group velocity vector from the wave vector spectrum is proposed. The new method was tested by comparing the obtained winter wind pattern with wind data from other sources. Testing the new method showed that it is in quantitative agreement with the Fabry-Pérot interferometer wind measurements for zonal and vertical wind velocities. The differences in meridional wind velocities are also discussed here. Of particular interest were the results related to the measurement of vertical wind velocities. We demonstrated that two independent methods gave the presence of vertical wind velocities with amplitude of~20 m/s. Estimation of vertical wind contribution to plasma drift velocity indicated the importance of vertical wind measurements and the need to take them into account in physical and empirical models of the ionosphere and thermosphere.

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Estimated plasmasphere electron content and O⁺/H⁺ transition height during the February 2022 geomagnetic storm from Irkutsk IS radar data

Khabituev,

Zherebtsov,

Ivonin

et al. 2024

Solar-Terrestrial Physics

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We study the topside ionosphere above the NmF2 ionization maximum and the transition region between the ionosphere and the plasmasphere. We analyze the interaction between the topside ionosphere and the plasmasphere during a strong geomagnetic storm in February 2022, using data from the Irkutsk Incoherent Scatter Radar (IISR) and total electron content data from global navigation satellite systems. To determine the ionosphere and plasmasphere electron contents, an original technique is employed to calculate the integral content of ion density from IISR data, which takes into account the two-component composition of ionospheric plasma. We compare different functions of approximation of the topside ionosphere. The original technique was adjusted for use with IISR Ne data fitted based on the β-Chapman profile. We compare the plasmasphere electron content during quiet and magnetically disturbed days, as well as the dynamics of the O⁺/H⁺ transition height, which is the upper boundary of the ionosphere and the lower boundary of the plasmasphere.

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Backscatter signal model for Irkutsk Incoherent Scatter Radar

Cited by 5 publications

References 13 publications

Ionospheric Disturbances Over Eastern Siberia During April 12–15, 2016 Geomagnetic Storms

Ionospheric Disturbances Over Eastern Siberia During April 12–15, 2016 Geomagnetic Storms

Method for Determining Neutral Wind Velocity Vectors Using Measurements of Internal Gravity Wave Group and Phase Velocities

Estimated plasmasphere electron content and O⁺/H⁺ transition height during the February 2022 geomagnetic storm from Irkutsk IS radar data

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