Dmitry Chugunin

• Space Research Institute, Russian Academy of Sciences

The ERG (Arase) satellite recently discovered a non-thermal hectometric continuum with a narrowband frequency structure. The mechanism behind the generation of this type of emission in the near-Earth plasma is still unknown. This study examines the potential use of electron cyclotron harmonics instability to explain the line structure of hectometri...

In the subauroral zone at the boundary of the auroral oval in the evening and night hours during geomagnetic disturbances, a narrow (about 1°–2°) and extended structure (several hours in longitude) is formed. It is known as a polarization jet (PJ) or the subauroral ion drift (SAID). The PJ/SAID is a fast westward ion drift and is one of the main si...

An Erratum to this paper has been published: https://doi.org/10.1134/S1062873824110030

In this study, we employ a unique multi‐instrumental approach for a comprehensive examination of Polarization Jet (PJ) (or, another name, Subauroral Ion Drift (SAID)). A diverse set of data is used to assess the connection between the appearance of the inhomogeneous structure of PJ/SAID and its reflection in ground‐based observations during geomagn...

A polarization jet (PJ or SAID –– SubAuroral Ion Drift) is a phenomenon of the subauroral ionosphere, which is a narrow band of fast (up to several km/s) westward ion drift at F-layer altitudes, the size of plasma irregularities inside which can reach tens to hundreds of meters. Despite the fact that such strong ion drifts and such highly structure...

In the subauroral zone at the boundary of the auroral oval in the evening and night hours during geomagnetic disturbances, a narrow (about 1º-2º) and extended structure (several hours in longitude) is formed. It is known as a polarization jet (PJ) or the sub-auroral ion drift (SAID). The PJ/SAID is a fast westward ion drift and is one of the main s...

We present the results of Auroral Kilometric Radiation (AKR) measurements near the plasmapause on the ERG (Arase) satellite. The apogee of the satellite's orbit is located near the ecliptic plane, at latitudes ±30°. According to the generally accepted point of view, AKR observation is impossible in this region since it is shielded by the plasmasphe...

We present the results of Auroral Kilometric Radiation (AKR) measurements near the plasmapause on the ERG (Arase) satellite. The apogee of the satellite's orbit is located near the ecliptic plane, at latitudes ±30°. According to the generally accepted point of view, AKR observation is impossible in this region since it is shielded by the plasmasphe...

We have analyzed characteristics of electric components of the auroral kilometric radiation (AKR) detected onboard of two satellites, in the Earth’s inner magnetosphere (ERG) and in the solar wind (WIND). It is shown that spectra are modified as the result of AKR the propagation in plasma channels — high frequencies are suppressed. The computer sim...

Представлены результаты исследования внутренней мелкомасштабной структуры поляризационного джета с использованием различных спутниковых данных. Подтвержден минимальный размер неоднородностей и типичный внутренний состав стратифицированного поляризационного джета. Обнаружена двухпиковая структура, которая представляет собой две крупных страты поляри...

Results are presented from a study of the internal small-scale structure of the polarization jet/SAID using data from different satellites. The minimum size of irregularities and the typical internal composition of a stratified subauroral ion drift (SSAID) are confirmed. A two-peak structure is found that contains two large strata of the polarizati...

The results of statistical processing of measurements of auroral kilometric radiation (AKR) detected on the WIND satellite near the libration point L1 are presented. It is shown that the frequency of AKR registration varies in antiphase with variations in solar activity. It is assumed that such a change in the frequency of AKR registration is due t...

In this work, we have studied the recently discovered hectometric continuum radiation in near-Earth plasma. We have carried out a detailed statistical analysis of the occurrence of a hectometric continuum near Earth at distances 1.1–2 Re, where Re is the Earth radius, for a two-year period, using data from the ERG (Arase) satellite. We have establi...

The results of a study of the small-scale internal structure of a polarization jet/SAID (Subauroral Ion Drift) based on satellite data using the wavelet transform of ionospheric plasma parameters are presented. The minimum sizes of small-scale temperature and electron density irregularities are determined. Most likely, any polarization jet/SAID is...

Представлены результаты исследования мелкомасштабной внутренней структуры поляризационного джета на основе спутниковых данных с использованием вейвлет-преобразования параметров ионосферной плазмы. Определены минимальные размеры мелкомасштабных неоднородностей температуры и концентрации электронов. Скорее всего, любой поляризационный джет является с...

In this work, we have studied the recently discovered hectometric continuum radiation in near-Earth plasma. We have carried out a detailed statistical analysis of the occurrence of a hectometric continuum near Earth at distances 1.1–2 Re, where Re is the Earth radius, for a two-year period, using data from the ERG (Arase) satellite. We have establi...

Based on thermal plasma measurements on the MAGION-5 and INTERBALL-1 satellites in the plasmasphere boundary layer, similar recurring changes in the proton density were identified depending on the L-shell. Such density variations have the following characteristic features: (a) density variations occur sharply, on the density profile—the dependence...

Plain Language Summary In the subauroral zone, narrow fluxes of fast subauroral ion drifts are observed near the projection of the plasmapause at heights of the F‐layer of the ionosphere, which are most noticeable during geomagnetic activity against the background of large‐scale plasma convection, called polarization jet (PJ) or subauroral ion drif...

An Erratum to this paper has been published: https://doi.org/10.1134/S0021364022380015

The electromagnetic fields measured on the ERG satellite are presented and their comparative analysis with measurements on the WIND satellite is carried out. The possibility of capturing auroral kilometric radiation (AKR) into plasma channels, which was first discovered on the ISEE satellite, has been confirmed. Plasma inhomogeneities, formed with...

We study the spatial structure of a polarization jet/Sub-Auroral Ion Drift (PJ/SAID) based on data from the NorSat-1 and Swarm satellites during a geomagnetic storm. Observations of plasma parameters inside the PJ/SAID are obtained with NorSat-1 using a system of Langmuir probes with a nominal sampling rate of up to 1 kHz, which allowed measurement...

Auroral kilometric radiation is used as a tool for the remote diagnostics of processes in the Earth’s magnetosphere. Using satellite data and the spectrum of fluctuations of auroral kilometric radiation at various frequencies, the fractal properties of the auroral region of the magnetosphere depending on the altitude of a source and the frequency o...

Full-text https://rdcu.be/cxl81

В настоящей работе изучается пространственная структура поляризационного джета по данным ионосферных спутников NorSat-1 и Swarm во время геомагнитной бури. Проведен сравнительный анализ зависимости концентрации и температуры электронов от инвариантной широты одновременно по измерениям на спутниках NorSat-1 и Swarm C во время пересечения спутниками...

In this work, we study the spatial structure of the polarization jet based on data from the NorSat-1 and Swarm ionospheric satellites during a geomagnetic storm. A comparative analysis of the electron density and temperature dependence on the invariant latitude is carried out simultaneously according to measurements of the NorSat-1 and Swarm C sate...

Observations are reported of electromagnetic emissions at frequencies above the electron gyrofrequency in a mirror-confined electron cyclotron resonance plasma. These emissions are interpreted as the excitation of the fast extraordinary wave at the fundamental harmonic of the electron gyrofrequency, similar to the excitation of the auroral kilometr...

In this work, we have studied the signals of auroral kilometer radiation (AKR) from sources in the auroral regions of the Northern and Southern hemispheres simultaneously recorded by one satellite. We have carried out a detailed statistical analysis of more than 20 months of continuous AKR measurements made by the ERG satellite (also known as Arase...

В настоящей работе проведено ис-следование мелкомасштабной структуры поляриза-ционного джета в субавроральной области во время геомагнитной бури 20 апреля 2018 г. Представлены результаты измерений параметров плазмы внутри поляризационного джета с максимальной частотой опроса 1 кГц с помощью зондов Ленгмюра, уста-новленных на микроспутнике NorSat-1....

In this work, we have studied the signals of auroral kilometer radiation (AKR) from sources in the auroral regions of the Northern and Southern hemispheres simultaneously recorded by one satellite. We have carried out a detailed statistical analysis of more than 20 months of continuous AKR measurements made by the ERG satellite (also known as Arase...

In this work, we study the small-scale structure of a polarization jet in the subauroral region during the April 20, 2018 geomagnetic storm. We report measurement results of plasma parameters inside the polarization jet with a maximum sampling rate of up to 1 kHz, obtained with Langmuir probes installed on the NorSat-1 microsatellite. The study est...

The Ionosphere missions are the part of Ionosond-2025 space project, which main scientific objectives are monitoring of physical processes in the Earth upper atmosphere, ionosphere and magnetosphere, as well as of solar activity. Within the framework of the Ionozond-2025 project, it is planned to launch four spacecraft Ionosphere and one satellite...

Субавроральная область ионосферы на сегодняшний день является актуальным предметом исследования, так как многие явления, происходящие в ней, изучены не до конца.Одно из таких явлений — поляризационный джет. Исследование параметров поляризационного джета до настоящего времени проводилось с помощью измерений наземных станций и спутниковых приборов с...

Plain Language Summary The current stage in the development of active experiments includes the use of satellites for sensing plasma disturbances in situ. However, these data can only be obtained if the satellite crosses an HF‐perturbed magnetic flux tube, which rests on a region with highly developed turbulence generated near pump wave reflected al...

p>We present a multi-instrumental study of ionospheric irregularities of different scales (from tens of centimeters to few kilometers) observed over the Central and East Siberia, Russia, during a moderate-to-strong geomagnetic storm on 27–28 May 2017. From high-frequency (HF) and ultrahigh-frequency (UHF) radar data, we observed an intense auroral...

Results of studying different-scale ionospheric irregularities on the basis of multi-instrumental data, obtained in the East Siberian region of Russia during the geomagnetic storm of May 27–28, 2017, are presented. Spatial inhomogeneities of electron density in the ionosphere were observed through data from ground-based receivers of signals of glob...

The principal possibility to measure the plasma density and its fluctuations in the ionosphere on ultra-small space vehicles using radiophysical methods is shown. These methods allow us to determine the characteristics of the medium by the properties of the received radiation. It is assumed that each small spacecraft has a satellite navigation rece...

The paper shows the possibility to measure plasma density and its fluctuations in the ionosphere on ultra-small space spacecraft using radiophysical methods that allow determining the characteristics of the medium through which radiation is transmitted. It is assumed that each spacecraft will have a navigational satellite receiver, as well as a dev...

This paper describes a space experiment that is planned to be performed within the framework of the Russian project of the microsatellite CHIBIS AI to meaure ionospheric signal delays to determine the electron density and spatial fluctuations of the ionospheric and magnetospheric plasma. The measurements will be conducted by the phase interferomete...

The currents induced by ion-acoustic solitons have been studied in a two-component magnetic–hydrodynamic approximation (MHD model) taking into account the trapped electrons. The solitons have been shown to excite unipolar nonpolar pulses of the ion and electron currents, and the established mechanisms of their excitation are. The spatiotemporal cha...

Krot device is a unique installation of the scientific infrastructure of the Russian Federation. It is a source of highly uniform low-temperature plasma that takes up to several tens of cubic meters. The setup makes it possible to perform both scaling laboratory simulations of ionospheric and magnetospheric phenomena in the approximation of unbound...

The problem of the outflow of ionospheric plasma into the magnetosphere is considered. In particular, the phenomenon of the polar wind observed in the polar cap is studied. The study of this phenomenon is complicated by the fact that the field-alined velocities of individual ions are small, and therefore, the electric field of the positively charge...

In this paper, measurements of thermal and superthermal ions on the Interball-2 satellite are compared with the results of numerical simulation based on geomagnetic disturbances on December 7, 1996. It is shown that kinetic processes at small scales can have a significant effect on large-scale processes in high latitudes, leading to heating and the...

The currents induced by ion-acoustic solitons have been studied in a two-component magnetic–hydrodynamic approximation (MHD model) taking into account the trapped electrons. The solitons have been shown to excite unipolar nonpolar pulses of the ion and electron currents, and the established mechanisms of their excitation are. The spatiotemporal cha...

The paper has presented a study of the dependence of the H⁺ ions concentration in the plasmasphere on geographic longitude. A vast database of measurements of the cold plasma density by the Alpha-3 instrument on board the INTERBALL-1 satellite has been used for the study. Based on these measurements, a dependence of the H⁺ ions concentration in the...

Permanent variation in parameters affecting the key characteristics of the auroral ionosphere hinders the creation of a sufficiently accurate model for practical application within classical approaches describing quasi-stationary phenomena. The fractal approach for describing the properties of plasma in the auroral region has the following advantag...

Процессы, происходящие в авроральной ионосфере, носят сложный нелинейный характер. Постоянное изменение параметров, влияющих на ключевые характеристики авроральной ионосферы, затрудняет создание достаточно точной модели для практического применения в рамках классических подходов, описывающей (квази)стационарные явления. Использование фрактального п...

The results of a joint experiment using the Tromsø heating facility and the INTERBALL-2 satellite are presented. It is shown that fluxes of accelerated ionospheric electrons reach an altitude of 11200 km, suppressing the auroral kilometric radiation. The timescales of the observed phenomena are estimated and possible physical mechanisms are discuss...

This article describes two scientific instruments for measuring electric and magnetic fields from the board of 4 high apogee satellites in the RESONANCE project. They are the experiment of electric fields measurement in a broad band AMEF-WB/IESP-3R and the electromagnetic wave analyzer ELMAVAN. There are represented all basic parameters of the devi...

The enhancement of auroral kilometric radiation near its lowest frequency has been detected in the polar edge of the auroral zone in the POLRAD experiment with the INTERBALL-2 satellite. The difference between the local electron cyclotron frequency and the lowest frequency of enhanced radiation is 8–20 kHz, indicating the closeness to the source of...

The Auroral Kilometric Radiation (AKR) was investigated on measurements in the POLRAD experiment on the INTERBALL-2 satellite. It was revealed "low-frequency" radiation with specific features in a spectrum on a polar edge of the auroral region. We have obtained that a series of narrow-band splashes are observed at frequencies between 35 and 70 kHz...

A flash-up of geomagnetic activity generates kinetic Alfven waves in the region, close to the polar boundary of aurora. These waves heat particles and produce favorable conditions for AKR source formation. We have used measurements of electromagnetic waves and plasma parameters onboard INERBALL-2 satellite to study locations of AKR sources during g...

Data of thermal ion heating on auroral polar border measured by Interball-2 (Auroral Probe) satellite is presented. When the satellite crossed of the polar cap on auroral polar border during high geomagnetic activity intense low frequency electromagnetic perturbations are detected. At the same time local heating of thermal plasma occurs. Near the b...

Characteristics of polar wind fluxes at a height of ∼20000 km measured by the Hyperboloid mass-spectrometer installed onboard the Interball-2 satellite are presented in the paper. The characteristics are presented for the upwelling flows of ionospheric ions H+, He+, and O+ from the sunlit polar cap in the period of solar activity minimum. Orbit seg...

Characteristics of the polar wind ion flux on ~20000 km altitude are presented. Measurements of the ion fluxes were made by Hyperboloid instrument onboard Interball-2 satellite. Characteristics were done for ionospheric H+, He+ and O+ ion moving upward from the sunlit polar cap in the period of solar minimum. From the analysis it were excluded meas...

The results of measurements of the ionospheric ions fluxes in the nightside polar cap at an altitude of about 20000 km are presented. The data have been obtained with the HYPERBOLOID instrument onboard the INTERBALL 2 satellite. Observations of ionospheric ion fluxes caused by heating in the auroral region have been excluded. In addition, an attemp...

The results of measurements of the ionospheric ions fluxes in the nightside polar cap at an altitude of about 20000 km are presented The data have been obtained with the HYPERBOLOID instrument onboard the INTERBALLf 2 satellite Observations of ionospheric ion fluxes caused by heating in the auroral region have been excluded In addition an attempt h...

Modeling of plasmasphere magnetic flux tube refilling by hydrodynamic TUBE-7 of ionosphere-magnetosphere dynamics model is presented Beginning conditions were calculated by modeling of polar wind characteristics open flux tube Almost empty in the beginning co-rotated flux tubes for L 3-6 were refilled for many days Calculated density profiles of re...

CDPDM is a semi-empiric model based on empiric convection boundary and hydrodynamic modeling of plasmasphere magnetic flux tube refilling. The results of radial density profile calculations and its comparisons with measurements are presented.

An analysis of the ionospheric ion outflow at nightside of the polar cap measured on INTERBALL-2 by the HYPERBOLOID low energy mass-angle spectrometer is presented. The dependence of polar wind ions outflow on polar rain precipitations is presented. It was found that polar rain flux intensifications correlate with more intense O+ outflow.

Proceedings of Yuri Galperin's Memorial Conference, Boulder

An analysis of the ionospheric ion outflow at nightside of the polar cap measured on INTERBALL-2 by the HYPERBOLOID low energy mass-angle spectrometer is presented. Detailed analysis of simultaneous measurements of higher energy electron and ion intensities was performed to choose the ion flow driven only by thermal energy ionospheric plasma. The c...

The results of measuring the fluxes of ionospheric ions in the nightside polar cap at an altitude of about 20 000 km are presented. The data are obtained with the HYPERBOLOID instrument onboard the INTERBALL-2 satellite. The passages without intense precipitation of magnetospheric ions and electrons have been selected using the ION instrument data,...

The results of comparison of the model profiles of density, obtained by means of the CDPDM model, with the experimental data of the ISEE-1 satellite for the years 1977–1983 are presented. The hypothesis on the validity of the mirror mapping of the convection boundary relative to the dawn–dusk direction is verified. An attempt to improve the CDPDM m...

Influence of satellite positive charge on magnetospheric plasma measurements is well- known. On the whole this influence can be considered as an absolute value decreasing of ion measured fluxes. From the other side the importance of temperature anisotropy influence on measurements interpretation is not studied very well. The most compli- cated situ...

An analysis of the ionospheric ion outflow at nightside of the polar cap measured on INTERBALL-2 by the HYPERBOLOID low energy mass-angle spectrometer is presented. Detailed analysis of simultaneous measurements of higher energy electron and ion intensities was performed to choose the ion flow driven only by thermal en- ergy ionospheric plasma. The...

A new population of dispersed suprathermal ions descending into the ionosphere is discovered in the cusp region from theINTERBALL-2 measurements at altitudes of 2–3R E. The proton energies of the population are below the low energy cut-off of the main dispersed proton population of the magnetosheath origin, and its intensity and density are also mu...

Ion data acquired by the Interball-Auroral satellite during crossings of the poleward boundary of the auroral oval in the 2200-0300 MLT sector at altitudes of ~2.5-3 Earth's radii reveal the frequent occurrence of thermal and superthermal H+ ion outflows. These events are strongly correlated with suprathermal electron fluxes and broadband electroma...

Based on a refined version of TUBE-7, the model of a geomagnetic plasma flux tube which includes electrons and seven ion species and takes their thermal balance into account, model calculations are performed in order to investigate the influence of nonsteady-state electron heating of the polar ionosphere when the cusp region is crossed by a flux tu...

Hyperboloid is a multi-directional mass spectrometer measuring ion distribution functions in the auroral and polar magnetosphere of the Earth in the thermal and suprathermal energy range. The instrument encompasses two analyzers containing a total of 26 entrance windows, and viewing in two almost mutually perpendicular half-planes. The nominal angu...

Three dimensional distributions of low energy (0–80 eV) ions have been obtained in the high-latitude dayside sector between 10,000 and 20,000 km by the Hyperboloid experiment onboard Interball-Auroral Probe. H+, He+ and O+ ions exhibit a latitude-energy dispersion characteristic of the cleft fountain. Test particle simulations are used to investiga...

Research has shown that spectrometers measuring low energy ions are essential tools for investigating both the spatial extent and the physical nature of ion acceleration processes in the Earth's ionized environment. Such a device was one of a number of experiments onboard the Interball Auroral Probe (Interball AP) launched by the Russian Space Agen...

The first results obtained by the HYPERBOLOID instrument on board the Auroral Probe satellite of the INTERBALL project are presented. This instrument is an angle-energy mass-spectrometer that can simultaneously measure fluxes of both the thermal and suprathermal H+, He+, O++, and O+ ions within the range of angles 10°-170° relative to the direction...