26 results on '"I. F. Domnin"'
Search Results
2. IONOSPHERIC EFFECTS OF GEOSPACE STORM OF NOVEMBER 13–14, 2012
- Author
-
I. F. Domnin, L. Ya. Emelyanov, and S. V. Katsko
- Subjects
geospace storm ,ionosphere storm phases ,ionosphere ,incoherent scattering ,Astronomy ,QB1-991 - Abstract
The results of studying the F region and topside ionosphere response to the strong magnetic storm of November 13–14, 2012 (Kp max=6+) are presented. The observations are carried out by the Kharkiv incoherent scatter radar. The magnetic storm was accompanied by the ionospheric storm with sign-variable phases. This storm was featured by the presence of two positive and one negative phases of disturbance.
- Published
- 2014
- Full Text
- View/download PDF
3. IONOSPHERIC STORM OF AUGUST 5–6, 2011: CALCULATION OF MAIN EFFECTS
- Author
-
S. V. Katsko, I. F. Domnin, L. Ya. Emelyanov, M. V. Lyashenko, and L. F. Chernogor
- Subjects
magnetic storm ,incoherent scattering ,ionospheric storm ,neutral atmosphere ,Astronomy ,QB1-991 - Abstract
Calculation of dynamic and thermal processes parameters during the severe magnetic storm of August 5–6, 2011 (Kp max=8−) are presented. The magnetic storm was accompanied by negative ionospheric disturbance over Kharkiv which caused a number of changes in ionosphere. Plasma heating was observed during electron concentration depression in the F-layer which was accompanied by changes in neutral atmosphere composition and ionospheric dynamics.
- Published
- 2014
- Full Text
- View/download PDF
4. Coincident Observations by the Kharkiv IS Radar and Ionosonde, DMSP and Arase (ERG) Satellites, and FLIP Model Simulations: Implications for the NRLMSISE‐00 Hydrogen Density, Plasmasphere, and Ionosphere
- Author
-
D. V. Kotov, P. G. Richards, V. Truhlík, O. V. Bogomaz, M. O. Shulha, N. Maruyama, M. Hairston, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, A. Matsuoka, I. Shinohara, M. Hernández‐Pajares, I. F. Domnin, T. G. Zhivolup, L. Ya. Emelyanov, and Ya. M. Chepurnyy
- Published
- 2018
- Full Text
- View/download PDF
5. The importance of neutral hydrogen for the maintenance of the midlatitude winter nighttime ionosphere: Evidence from IS observations at Kharkiv, Ukraine, and field line interhemispheric plasma model simulations
- Author
-
D. V. Kotov, P. G. Richards, O. V. Bogomaz, L. F. Chernogor, V. Truhlik, L. Ya. Emelyanov, Ya. M. Chepurnyy, and I. F. Domnin
- Published
- 2016
- Full Text
- View/download PDF
6. Coupled investigations of ionosphere variations over European and Japanese regions: observations, comparative analysis, and validation of models and facilities
- Author
-
T. G. Zhivolup, Yuichi Otsuka, S. V. Panasenko, Dmytro Kotov, Mamoru Yamamoto, Philip G. Richards, Vladimir Truhlik, Maryna Shulha, I. F. Domnin, Oleksandr Bogomaz, and Hiroyuki Hashiguchi
- Subjects
and wave-like variations ,QE1-996.5 ,Electron density ,Model and facility validation ,Field line ,Plasma parameters ,Incoherent scatter ,European and Japanese sectors ,Geology ,Ionospheric observations ,Geodesy ,International Reference Ionosphere ,storm-time ,law.invention ,Background ,law ,Physics::Space Physics ,Geography. Anthropology. Recreation ,General Earth and Planetary Sciences ,Environmental science ,Satellite ,Radar ,Ionosphere - Abstract
This paper presents the results of a coordinated measurement campaign with ground based and satellite observations over European and Japanese regions during September 5–6, 2017. Two incoherent scatter radars, two satellite missions, International Reference Ionosphere (IRI-2016) empirical model, and Field Line Interhemispheric Plasma (FLIP) physical model were employed to examine the regular behavior of the F2-layer peak height and density and the topside ionosphere electron density, electron, and ion temperatures as well as traveling ionospheric disturbances (TIDs). The daily ionospheric variations over Kharkiv and Shigaraki exhibited similar behavior qualitatively and quantitatively. The results show that none of the empirical IRI-2016 models of F2-layer peak height, topside electron density, and temperature can be preferred for predicting the key qualitative features of variations in ionospheric plasma parameters over Kharkiv and Shigaraki. The likely reason is rapid day to day changes in solar activity and series of moderate enhancements of magnetic activity occurring in the observation period and preceding days. Compared with IRI-2016 model, the FLIP physical model was shown to provide the best agreement with the observations when constrained to follow the observed diurnal variations of F2-layer peak height both over Europe and Japan. This paper presents the first direct comparison of the mid-latitude electron density measured by the Swarm satellite with incoherent scatter radar data and it confirms the high quality of the space-borne data. For the first time, evidence of the possible need to increase the neutral hydrogen density in NRLMSISE-00 model by at least a factor of 2 was obtained for the Asian longitudinal sector. The TIDs, which have predominant periods of about 50 min over Europe and 80 min over Japan, were detected, likely caused by passage of the solar terminator. Such a difference in the periods could indicate regional features and is the topic for further research.
- Published
- 2021
- Full Text
- View/download PDF
7. Physical processes in the ionosphere during the solar eclipse on March 20, 2015 over Kharkiv, Ukraine (49.6° N, 36.3° E)
- Author
-
L. F. Chernogor, Leonid Ya Emelyanov, M. V. Lyashenko, and I. F. Domnin
- Subjects
Physics ,Atmospheric Science ,Electron density ,Drift velocity ,010504 meteorology & atmospheric sciences ,Solar eclipse ,Incoherent scatter ,Atmospheric sciences ,01 natural sciences ,Geophysics ,Space and Planetary Science ,Physics::Space Physics ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,Electron temperature ,Astrophysics::Earth and Planetary Astrophysics ,Ionosphere ,010303 astronomy & astrophysics ,Ionosonde ,0105 earth and related environmental sciences ,Eclipse - Abstract
We present the results of observations of variations in the mid-latitude ionospheric parameters and physical processes in the geospace during March 20, 2015 partial solar eclipse over Kharkiv (49.60° N, 36.30° E) where the eclipse magnitude was about 0.54. The Kharkiv incoherent scatter (IS) radar and digital ionosonde were used for ionospheric observations and estimations of the parameters of the thermal and dynamical processes. At the time of the maximum obscuration of the Sun's area, an increase in the ionospheric F2 peak height by about 40 km was observed. At the same time, the electron density at altitudes of 190 and 210 km decreased by approximately 18.5 and 16.5%, respectively. During the eclipse, a decrease in the electron temperature and apparent changes in the vertical plasma drift velocity were observed. The observations and analysis have shown that the solar eclipse led to significant restructuring of the thermal and dynamic state of the ionospheric plasma over Kharkiv.
- Published
- 2019
- Full Text
- View/download PDF
8. Ionosphere response to geomagnetic storms on 7-8 September 2017 over Kharkiv (Ukraine)
- Author
-
I. F. Domnin, L. F. Chernogor, S. V. Katsko, and L. Ya. Emelyanov
- Subjects
Geomagnetic storm ,Drift velocity ,Disturbance (geology) ,Incoherent scatter ,Atmospheric sciences ,Physics::Geophysics ,law.invention ,Critical frequency ,law ,Middle latitudes ,Physics::Space Physics ,Radar ,Ionosphere ,Physics::Atmospheric and Oceanic Physics ,Geology - Abstract
Response of middle latitude ionospheric F-region to two sequential geomagnetic storms on 7–8 September 2017 has been studied using the incoherent scatter radar of Institute of Ionosphere $(49.60^{\circ}N, 36.30^{\circ}E)$. The G3-class geomagnetic storm on 7 September and the G4-class geomagnetic storm on 8 September had close intensities. The first geomagnetic storm was accompanied by the positive disturbance during the main phase and the negative disturbance during the recovery phase. Effects of the second geomagnetic storm caused the negative disturbance. The ionosphere was characterized by a largescale variation in critical frequency $fo F2$ (from 6 to 8 MHz and from 6 to 4 MHz), F2-layer peak height $hm F2$ (by 70–80 km) and the vertical plasma drift velocity oscillations (up to 50–80 m/s).
- Published
- 2020
- Full Text
- View/download PDF
9. Unusually high thermospheric hydrogen density prior to severe storm of September 8, 2017 and its impact on the storm manifestations
- Author
-
Yakiv Chepurnyy, Philip G. Richards, Manuel Hernández-Pajares, Fuminori Tsuchiya, Masafumi Shoji, Vladimir Truhlik, Ayako Matsuoka, Dmytro Kotov, Yoshiya Kasahara, I. F. Domnin, Iku Shinohara, T. G. Zhivolup, Mariangel Fedrizzi, Atsushi Kumamoto, Yoshizumi Miyoshi, Naomi Maruyama, Leonid Emelyanov, Maryna Shulha, János Lichtenberger, and Oleksandr Bogomaz
- Subjects
Hydrogen density ,Environmental science ,Storm ,Atmospheric sciences - Abstract
Atomic hydrogen plays a key role for the plasmasphere, exosphere, and the nighttime ionosphere. It directly impacts the rate of plasmasphere refilling after strong magnetic storms as atomic hydrogen is the primary source of hydrogen ions. It is the source of the geocorona, which significantly affects ring current decay during the recovery phase of magnetic storms.Our previous studies with the Kharkiv incoherent scatter radar (49.6 N, 36.3 E), Arase and DMSP satellite missions, and FLIP physical model showed that during magnetically quiet periods of 2016–2018 the hydrogen density was generally a factor of 2 higher than from the NRLMSIS00-E model (Kotov et al., 2018).Even larger values of thermospheric hydrogen density were detected prior to the severe storm of September 8, 2017. With Kharkiv IS radar, AWDANet whistler receivers, Arase satellite, and TEC data we found that during the nights of September 5 to 6 and September 6 to 7, the thermospheric hydrogen density had to be at least a factor of 4 higher than the values from NRLMSIS00-E model i.e. ~100% higher than expected from our previous studies. We discuss the possible mechanisms that could lead to the increased hydrogen density.Such high hydrogen densities may be the reason for very quick recovery of inner plasmasphere after the severe depletion by the storm of September 8, 2017 (Obana et al., 2019).References:1. Kotov, D. V., Richards, P. G., Truhlík, V., Bogomaz, O. V., Shulha, M. O., Maruyama, N., et al. ( 2018). Coincident observations by the Kharkiv IS radar and ionosonde, DMSP and Arase (ERG) satellites, and FLIP model simulations: Implications for the NRLMSISE‐00 hydrogen density, plasmasphere, and ionosphere. Geophysical Research Letters, 45, 8062– 8071. https://doi.org/10.1029/2018GL0792062. Obana, Y., Maruyama, N., Shinbori, A., Hashimoto, K. K., Fedrizzi, M., Nosé, M., et al. (2019). Response of the ionosphere‐plasmasphere coupling to the September 2017 storm: What erodes the plasmasphere so severely? Space Weather, 17, 861–876. https://doi.org/10.1029/2019SW002168
- Published
- 2020
- Full Text
- View/download PDF
10. Traveling ionospheric disturbances observed by Kharkiv and Millstone Hill incoherent scatter radars near vernal equinox and summer solstice
- Author
-
I. F. Domnin, S. V. Panasenko, Philip J. Erickson, K. Aksonova, and Larisa Petrovna Goncharenko
- Subjects
Atmospheric Science ,Millstone Hill ,010504 meteorology & atmospheric sciences ,Incoherent scatter ,Electrojet ,Equinox ,Sunset ,Atmospheric sciences ,01 natural sciences ,Geophysics ,Space and Planetary Science ,0103 physical sciences ,Solstice ,Sunrise ,Ionosphere ,010303 astronomy & astrophysics ,Geology ,0105 earth and related environmental sciences - Abstract
We present the results of comparative study of traveling ionospheric disturbances (TIDs) obtained at middle latitudes of different longitudinal sectors during two coordinated observational campaigns. The joint measurements were conducted near the vernal equinox and summer solstice in 2016 using Kharkiv (49.6 N, 36.3 E) and Millstone Hill (42.6 N, 288.5 E) incoherent scatter radars. The same methods and software were used for analysis of both data sets to ensure consistency. We found that TIDs with periods of 40–80 min are observed during all measurements and concentrated predominantly near the sunrise and sunset terminators over both sites. There is no obvious relationship between the observed wave processes and variations in the auroral electrojet. Absolute and relative amplitudes, time of appearance, durations and phase differences of TIDs show strong height and seasonal variability. Relative amplitudes are substantially greater over Millstone Hill, whereas higher absolute amplitudes are observed over Kharkiv. During the summer solstice, the overall wave activity is smaller than during vernal equinox. Additional joint observations are needed to identify the seasonal and longitudinal dependences of TID characteristics.
- Published
- 2018
- Full Text
- View/download PDF
11. Motion of Ionospheric Plasma: Results of Observations above Kharkiv in Solar Cycle 24
- Author
-
L. Ya. Emelyanov, L. F. Chernogor, I. F. Domnin, and M. V. Lyashenko
- Subjects
010504 meteorology & atmospheric sciences ,Meteorology ,Incoherent scatter ,Storm ,Solar cycle 24 ,01 natural sciences ,Wind speed ,Physics::Geophysics ,law.invention ,Geophysics ,Earth's magnetic field ,Space and Planetary Science ,law ,Physics::Space Physics ,0103 physical sciences ,Environmental science ,Solstice ,Astrophysics::Earth and Planetary Astrophysics ,Radar ,Ionosphere ,010303 astronomy & astrophysics ,Physics::Atmospheric and Oceanic Physics ,0105 earth and related environmental sciences - Abstract
The equipment and methodical characteristics of determining the vertical component of the ionospheric plasma motion velocity Vz based on an incoherent scatter radar of Institute of Ionosphere, National Academy of Sciences and Ministry of Education and Science of Ukraine (Kharkiv), which is the only radar of such type in Central Europe, are described. Based on the radar data, the patterns of altitude and diurnal variations in Vz near the maximum of solar cycle 24 for the typical geophysical conditions (around the summer and winter solstices, the spring and fall equinoxes) at low geomagnetic activity and the specifics of these changes during ionospheric storms are presented. The results of modeling of the dynamic processes in ionospheric plasma under the conditions of the undisturbed ionosphere, including the determination of altitudetime variations in the thermospheric wind velocity, are presented. It has been established that this velocity can significantly differ from the thermospheric wind velocity calculated by the known empirical global models. This difference is likely related to the regional features of thermospheric wind that are not shown in the global models.
- Published
- 2018
- Full Text
- View/download PDF
12. Weak magnetic storms can modulate ionosphere-plasmasphere interaction significantly: mechanisms and manifestations at mid-latitudes
- Author
-
I. F. Domnin, Dmytro Kotov, Vladimir Truhlik, János Lichtenberger, Mariangel Fedrizzi, Maryna Shulha, Oleksandr Bogomaz, Ya. M. Chepurnyy, P. G. Richards, L. F. Chernogor, T. G. Zhivolup, Naomi Maruyama, Manuel Hernández-Pajares, L. Ya. Emelyanov, Universitat Politècnica de Catalunya. Departament de Matemàtiques, and Universitat Politècnica de Catalunya. IonSAT - Grup de determinació Ionosfèrica i navegació per SAtèl·lit i sistemes Terrestres
- Subjects
Astrofísica ,ionosphere-plasmasphere interaction ,85 Astronomy and astrophysics [Classificació AMS] ,Matemàtiques i estadística::Matemàtica aplicada a les ciències [Àrees temàtiques de la UPC] ,Plasmasphere ,Storm ,thermosphere hydrogen density ,Geofísica ,Atmospheric sciences ,Physics::Geophysics ,Geophysics ,Space and Planetary Science ,modulation of H+ ion flux ,topside ion composition ,Middle latitudes ,Astronomy and astrophysics ,Physics::Space Physics ,86 Geophysics [Classificació AMS] ,Ionosphere ,Weak magnetic storms ,mid-latitude ionosphere ,Geology - Abstract
A comprehensive study of the response of the ionosphere-plasmasphere system at mid-latitudes to weak (Dstmin > -50 nT) magnetic storms is presented. For the first time, it is shown that weak magnetic disturbances can lead to significant modulation of ionosphere-plasmasphere H+ ion fluxes. It is found that this modulation is caused by the enhancements/reductions of the topside O+ ion density, which is induced by F2-layer peak height rise and fall during the storms. The F2-layer motion is caused by thermospheric wind changes and by a penetration electric field. Both drivers are closely related to the changes in the Bz component of interplanetary magnetic field. The most prominent manifestation of the H+ ion flux modulation is strong changes in H+ ion fraction in the topside ionosphere. This study also indicates that the NRLMSISE-00 model provides the correct relative changes of neutral H density during weak magnetic storms and also that there is a compelling need to include geomagnetic activity indices, in addition to solar activity (F10.7), as input parameters to empirical topside ionosphere models.
- Published
- 2019
13. The importance of neutral hydrogen for the maintenance of the midlatitude winter nighttime ionosphere: Evidence from IS observations at Kharkiv, Ukraine, and field line interhemispheric plasma model simulations
- Author
-
I. F. Domnin, Vladimir Truhlik, L. F. Chernogor, P. G. Richards, Ya. M. Chepurnyy, Oleksandr Bogomaz, L. Ya. Emelyanov, and Dmytro Kotov
- Subjects
Solar minimum ,Daytime ,010504 meteorology & atmospheric sciences ,Incoherent scatter ,Plasmasphere ,Atmospheric sciences ,01 natural sciences ,Physics::Geophysics ,Geophysics ,Space and Planetary Science ,Middle latitudes ,Physics::Space Physics ,0103 physical sciences ,Environmental science ,Thermosphere ,Ionosphere ,010303 astronomy & astrophysics ,Physics::Atmospheric and Oceanic Physics ,Ring current ,0105 earth and related environmental sciences - Abstract
This study investigates the causes of nighttime enhancements in ionospheric density that are observed in winter by the incoherent scatter radar at Kharkiv, Ukraine. Calculations with a comprehensive physical model reveal that large downward ion fluxes from the plasmasphere are the main cause of the enhancements. These large fluxes are enabled by large upward H+ fluxes into the plasmasphere from the conjugate summer hemisphere during the daytime. The nighttime downward H+ flux at Kharkiv is sensitive to the thermosphere model H density, which had to be increased by factors of 2 to 3 to obtain model-data agreement for the topside H+ density. Other studies support the need for increasing the thermosphere model H density for all seasons at solar minimum. It was found that neutral winds are less effective than plasmaspheric fluxes for maintaining the nighttime ionosphere. This is partly because increased equatorward winds simultaneously oppose the downward H+ flux. The model calculations also reveal the need for a modest additional heat flow from the plasmasphere in the afternoon. This source could be the quiet time ring current.
- Published
- 2016
- Full Text
- View/download PDF
14. Features of Signals Reception and Processing at the Kharkiv Incoherent Scatter Radar
- Author
-
I. F. Domnin, Evgenii Rogozhkin, Leonid Emelyanov, and Artem Miroshnikov
- Subjects
Physics ,Transformation (function) ,Intermediate frequency ,law ,Frequency multiplier ,Acoustics ,Incoherent scatter ,Radar ,Ionosphere ,Signal ,law.invention ,Data processing system - Abstract
The features of reception and transformation of the incoherent scatter signal as well as digital processing signals extracted at low and intermediate frequencies are considered. The system for recording and processing signal at intermediate frequency is proposed. The justification for the choice of its frequency multiplier unit is adduced for forming ADC reading pulses that rigidly linked to intermediate frequency. The developed system allows employ algorithms that adapted to the altitude range under study and ionospheric plasma conditions.
- Published
- 2018
- Full Text
- View/download PDF
15. Night-time light ion transition height behaviour over the Kharkiv (50°N, 36°E) IS radar during the equinoxes of 2006–2010
- Author
-
I. F. Domnin, P. G. Richards, Stanimir Stankov, Vladimir Truhlik, L. F. Chernogor, Oleksandr Bogomaz, and Dmytro Kotov
- Subjects
Solar minimum ,Physics ,Atmospheric Science ,Hydrogen ,Incoherent scatter ,Airglow ,chemistry.chemical_element ,Plasmasphere ,Atmospheric sciences ,Ion ,Geophysics ,chemistry ,Space and Planetary Science ,Physics::Space Physics ,Ionosphere ,Atomic physics ,Exosphere - Abstract
This research investigates anomalous nighttime ion density behaviour over the Kharkiv, Ukraine incoherent scatter radar (49.6° N, 36.3° E, 45.3° inv) during the equinoxes of 2006–2010. The observations show that the altitude of the transition from O+ to lighter ions was much lower than empirical and physical models predict. The standard physical model produces very good agreement for the O+ densities but underestimates the H+ densities by a factor of 2 in March 2006 and a factor of 3 in March 2009. The anomalously low transition height is a result of similar lowering of the ionospheric peak height and also of significantly increased H+ density. The lower ionospheric peak height may be caused by weaker nighttime neutral winds. The calculations indicate that the higher measured topside ionosphere H+ densities are most likely due to higher neutral hydrogen densities. Both factors could be the result of weaker than usual magnetic activity, which would reduce the energy input to high latitudes. Prolonged low activity periods could cause a global redistribution of hydrogen and also allow more neutral hydrogen to settle down from the exosphere into the mid-latitude ionosphere. The finding of the need for higher H densities agrees well with recent H-alpha airglow measurements and it is important for accurate modelling of plasmasphere refilling rates and night-time NmF2 values.
- Published
- 2015
- Full Text
- View/download PDF
16. Observations of the Ionospheric Wave Disturbances Using the Kharkov Incoherent Scatter Radar upon RF Heating of the Near-Earth Plasma
- Author
-
S. V. Panasenko, V. L. Frolov, L. F. Chernogor, and I. F. Domnin
- Subjects
Physics ,Nuclear and High Energy Physics ,Electron density ,Doppler radar ,Incoherent scatter ,Astronomy and Astrophysics ,Statistical and Nonlinear Physics ,Plasma ,Radiation ,Electronic, Optical and Magnetic Materials ,law.invention ,Computational physics ,law ,Dielectric heating ,Electrical and Electronic Engineering ,Ionosphere ,Radar ,Remote sensing - Abstract
Characteristics of the wave disturbances of the ionospheric electron number density were measured using the Kharkov incoherent scatter radar. The disturbance generation accompanied the SURA heating of the near-Earth plasma by high-power periodic radiation. The distance between the heater and the radar was about 960 km. The possibility of generating ionospheric wave disturbances with a period of 20 to 30 min in the internal gravity wave range was confirmed. The disturbance propagation velocity was near 320–400 m/s, and the relative amplitude of the electron density variation was 1–10%. The wave disturbances appeared in the altitude range 145–235 km. Aperiodic bursts of the electron number density with a relative amplitude of up to 5–10% were detected after the first switch-ons of periodic radiation in the 30-min heating — 30-min pause regime at altitudes of 145 to 310 km. The observation results generally conform to the synchronous observation data obtained using the Kharkov vertical-sounding Doppler radar and a network of ionosondes.
- Published
- 2015
- Full Text
- View/download PDF
17. Peculiarities of database for Kharkiv incoherent scatter radar
- Author
-
I. F. Domnin, Artem Miroshnikov, and Oleksandr Bogomaz
- Subjects
Data processing ,Database ,Incoherent scatter ,computer.software_genre ,law.invention ,Radar engineering details ,Data acquisition ,Geography ,law ,Server ,Radar ,Ionosphere ,Raw data ,computer ,Remote sensing - Abstract
The paper presents the structure and peculiarities of the developed database used for Kharkiv incoherent scatter radar data storing. The heterogeneity of the raw data, the existence of specific periods of data acquisition, the use of the IS radar data processing program to estimate size and quality of the data, the use of the external server to store the results of data processing, and the ability to fill database with data acquired by different radiophysical instruments are described.
- Published
- 2017
- Full Text
- View/download PDF
18. IONOSPHERIC STORM OF NOVEMBER 13–14, 2012: SIMULATION RESULTS OF THERMAL AND DYNAMIC EFFECTS
- Author
-
S. V. Katsko, L. F. Chernogor, M. V. Lyashenko, and I. F. Domnin
- Subjects
Ionospheric storm ,Physics ,Physics and Astronomy (miscellaneous) ,lcsh:Astronomy ,geospace storm ,Analytical chemistry ,dynamic and thermal processes ,Astronomy and Astrophysics ,Atmospheric sciences ,Physics::Geophysics ,lcsh:QB1-991 ,Space and Planetary Science ,Electron thermal conductivity ,Physics::Space Physics ,ionospheric disturbance ,Electrical and Electronic Engineering ,incoherent scattering ,Physics::Atmospheric and Oceanic Physics - Abstract
УДК 550.385.4, 550.358:550.388 Приведены результаты расчетов эффектов возмущений теплового и динамического режимов верхней атмосферы Земли во время сильной магнитной бури 13–14 ноября 2012 г. Магнитная буря вызвала целый комплекс процессов, сопутствовавших возмущениям плазмы, электрических и магнитных полей в различных областях околоземного пространства. Подтверждено наличие в геомагнитных бурях как индивидуальных особенностей, так и общих закономерностей. Ключевые слова: геокосмическая буря, ионосферное возмущение, некогерентное рассеяние, динамические и тепловые процессы Статья поступила в редакцию 01.10.2014 Radio phys. radio astron. 2014, 19(4): 336-347 СПИСОК ЛИТЕРАТУРЫ 1. Домнин И. Ф., Емельянов Л. Я., Кацко С. В., Черногор Л. Ф. Ионосферные эффекты геокосмической бури 13–14 ноября 2012 г. // Радиофизика и радиоастрономия. – 2014. – Т. 19, № 2. – С. 170–180. 2. Черногор Л. Ф., Домнин И. Ф. Физика геокосмических бурь. – Харьков: ХНУ имени В. Н. Каразина, 2014. – 408 с. 3. Черногор Л. Ф. Физика Земли, атмосферы и геокосмоса в свете системной парадигмы // Радиофизика и радиоастрономия. – 2003. – Т. 8, № 1. – С. 59–106. 4. Григоренко Е. И., Пазюра С. А., Таран В. И., Черногор Л. Ф., Черняев С.В. Динамические процессы в ионосфере во время сильнейшей магнитной бури 30–31 мая 2003 г. // Геомагнетизм и аэрономия. – 2005. – Т. 45, № 6. – С. 803–823. 5. Salah J. E. and Evans J. V. Measurements of thermospheric temperature by incoherent scatter radar. In: Space Research XIII. – Berlin: Academie – Verlag, 1973. – P. 268–286. 6. Picone J. M., Hedin A. E., Drob D. P., and Aikin A. C. NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues // J. Geophys. Res. Space Phys. – 2002. – Vol. 107, Is. A12. – P. SIA15-1–SIA15-16. 7. Бэнкс П. М. Тепловая структура ионосферы // ТИИЭР. – 1969. – Т. 57, № 3. – С. 6–30. 8. Schunk R. W. and Nagy A. F. Ionospheres: Physics, Plasma Physics, and Chemistry. – Cambridge, UK: Cambridge University Press, 2004. – 554 p. 9. Banks P. M. Charged particle temperatures and electron thermal conductivity in the upper atmosphere // Ann. Geophys. – 1966. – Vol. 22. – P. 577–584. 10. Dalgarno A. and Degges T. C. Electron cooling in the upper atmosphere // Planet. Space Sci. – 1968. – Vol. 16, Is. 1. – P. 125–127. 11. Сергеенко Н. П. Оценки электрических полей во время ионосферных возмущений. В кн.: Ионосферное прогнозирование. – М.: Наука, 1982. – С. 91–96. 12. Брюнелли Б. Е., Намгаладзе А. А. Физика ионосферы. – М.: Наука, 1987. – 528 с. 13. Домнин И. Ф., Емельянов Л. Я., Ляшенко М. В., Харитонова С. В., Черногор Л. Ф. Ионосферные процессы, сопровождавшие геокосмическую бурю 5–6 августа 2011 г. // Радиофизика и радиоастрономия. – 2012. – Т. 17, № 4. – С. 320–332. 14. Григоренко Е. И., Лысенко В. Н., Таран В. И., Черногор Л. Ф. Результаты радиофизических исследований процессов в ионосфере, сопровождавших сильнейшую геомагнитную бурю 25 сентября 1998 г. // Успехи современной радиоэлектроники. – 2003. – № 9. – С. 57–94. 15. Григоренко Е. И., Лазоренко С. В., Таран В. И., Черногор Л. Ф. Волновые возмущения в ионосфере, сопровождающие вспышку на Солнце и сильнейшую магнитную бурю 25 сентября 1998 г. // Геомагнетизм и аэрономия. – 2003. – Т. 43, № 6. – С. 770–787. 16. Кацко С. В., Домнин И. Ф., Емельянов Л. Я., Ляшенко М. В., Черногор Л. Ф. Ионосферная буря 5–6 августа 2011 г.: результаты расчетов основных эффектов // Радиофизика и радиоастрономия. – 2014. – Т. 19, № 1. – С. 26–39. 17. Данилов А. Д. Реакция области F на геомагнитные возмущения (обзор) // Гелиогеофизические исследования. – 2013. – № 5. – С. 1–33. 18. Пазюра С. А., Таран В. И., Черногор Л. Ф. Особенности ионосферной бури 4–6 апреля 2006 г. // Космічна наука і технологія. – 2008. – Т. 14, № 1. – С. 65–76. 19. Mansilla G. A. Mid-latitude effects of a great geomagnetic storm // J. Atmos. Sol.-Terr. Phys. – 2004. – Vol. 66, No. 12. – P. 1085–1091. 20. Mansilla G. A. Some effects in the upper atmosphere during geomagnetic storms // Adv. Space Res. – 2010. – Vol. 47, No. 6. – P. 930–937. 21. Sojka J. J., David M., Schunk R. W., and Heelis R. A. A modeling study of the longitudinal dependence of storm time midlatitude dayside total electron content enhancements // J. Geophys. Res. Space. Phys. – 2012. – Vol. 117, Is. A2. – id. A017000.
- Published
- 2014
- Full Text
- View/download PDF
19. IONOSPHERIC EFFECTS OF GEOSPACE STORM OF NOVEMBER 13–14, 2012
- Author
-
L. F. Chernogor, I. F. Domnin, L. Ya. Emelyanov, and S. V. Katsko
- Subjects
Physics ,Physics and Astronomy (miscellaneous) ,lcsh:Astronomy ,geospace storm ,Astronomy and Astrophysics ,ionosphere ,Atmospheric sciences ,Physics::Geophysics ,Radar observations ,lcsh:QB1-991 ,Space and Planetary Science ,Physics::Space Physics ,Electrical and Electronic Engineering ,Ionosphere ,ionosphere storm phases ,incoherent scattering ,Physics::Atmospheric and Oceanic Physics - Abstract
Приведены результаты исследования отклика области F и внешней ионосферы на сильную магнитную бурю 13–14 ноября 2012 г. (Kp max= 6+ ). Наблюдения проведены с помощью радара некогерентного рассеяния, расположенного вблизи г. Харькова. Магнитная буря сопровождалась ионосферной бурей со знакопеременными фазами. Особенностью данной бури является наличие двух положительных и одной отрицательной фаз возмущения. Ключевые слова: геокосмическая буря, фазы ионосферной бури, ионосфера, некогерентное рассеяние Статья поступила в редакцию 14.02.2014 Radio phys. radio astron. 2014, 19(2): 170-180 СПИСОК ЛИТЕРАТУРЫ 1. Черногор Л. Ф., Домнин И. Ф . Физика геокосмических бурь. – Х.: ХНУ имени В. Н. Каразина, 2014. – 408 с. 2. Chernogor L. F., Grigorenko Ye. I., Lysenko V. N., and Taran V. I. Dynamic processes in the ionosphere during magnetic storms from the Kharkov incoherent scatter radar observations // Int. J. Geomagn. Aeron. – 2007. – Vol. 7, No. 3. – id. GI3001. 3. Buonsanto M. J. Ionospheric Storms: A Review // Space Sci. Rev. – 1999. – Vol. 88, No. 3–4. – P. 563–601. 4. Mikhailov A. V. and Foster J. C. Daytime thermosphere above Millstone Hill during severe geomagnetic storms // J. Geophys. Res: Space Phys. – 1997. – Vol. 102, Is. A8. – P. 17275–17282. 5. Danilov A. D. F2 region response to geomagnetic disturbances // J. Atmos. Solar-Terr. Phys. – 2001. – Vol. 63, Is. 5. – P. 441–449. 6. Домнин И. Ф., Емельянов Л. Я., Кацко С. В., Ляшенко М. В., Черногор Л. Ф. Ионосферные эффекты магнитной бури 13–15 ноября 2012 г. // Cб. тез. докл. 13-й украинской конф. по космическим исследованиям. – Евпатория (Украина). – 2013. – С. 52. 7. Кацко С. В. Геокосмическая буря 14 ноября 2012 года: результаты наблюдений на харьковском радаре некогерентного рассеяния // Сб. тез. докл. конф. ИОН-2013 “Дистанционное радиозондирование ионосферы”. – Малый Маяк, Крым (Украина). – 2013. – С. 46. 8. Черногор Л. Ф. Физика Земли, атмосферы и геокосмоса в свете системной парадигмы // Радиофизика и радиоастрономия. – 2003. – Т. 8, № 1. – С. 59–106. 9. Черногор Л. Ф. Земля – атмосфера – ионосфера – магнитосфера как открытая динамическая нелинейная физическая система. 1 // Нелинейный мир. – 2006. – Т. 4, № 12. – С. 655–697. 10. Бархатов Н. А., Бархатова О. М. Выявление классов ионосферной возмущенности по многолетним данным о критической частоте слоя F2 // Геомагнетизм и аэрономия. – 2012. – Т. 52, № 4. – С. 510–518. 11. Mikhailov A. V., Skoblin M. G., and Forster M. Daytime F2-layer positive storm effect at middle and lower latitudes // Ann. Geophys. – 1995. – Vol. 13, No. 5. – P. 532–540. 12. Данилов А. Д., Морозова Л. Д. Ионосферные бури в области F2. Морфология и физика (обзор) // Геомагнетизм и аэрономия. – 1985. – Т. 25, № 5. – С. 705–721. 13. Кринберг И. А., Тащилин А. В. Ионосфера и плазмосфера. – М.: Наука, 1984. – 190 с. 14. Данилов А. Д., Морозова Л. Д., Мирмович Э. Г. О возможной природе положительной фазы ионосферных бурь // Геомагнетизм и аэрономия. – 1985. – Т. 25, № 5. – С. 768–772. 15. Черногор Л. Ф. Земля – атмосфера – ионосфера – магнитосфера как открытая динамическая нелинейная физическая система. 2 // Нелинейный мир. – 2007. – Т. 5, № 4. – С. 225–246. 16. Chernogor L. F. The Earth – atmosphere – geospace system: main properties and processes // Int. J. Remote Sens. – 2011. – Vol. 32, No. 11. – P. 3199–3218.
- Published
- 2014
20. IONOSPHERIC STORM OF AUGUST 5–6, 2011: CALCULATION OF MAIN EFFECTS
- Author
-
M. V. Lyashenko, L. F. Chernogor, L. Ya. Emelyanov, I. F. Domnin, and S. V. Katsko
- Subjects
Ionospheric storm ,Geomagnetic storm ,Physics ,Physics and Astronomy (miscellaneous) ,Meteorology ,lcsh:Astronomy ,Incoherent scatter ,Astronomy and Astrophysics ,Atmospheric sciences ,ionospheric storm ,Physics::Geophysics ,lcsh:QB1-991 ,Neutral atmosphere ,Space and Planetary Science ,Physics::Space Physics ,Electrical and Electronic Engineering ,incoherent scattering ,neutral atmosphere ,magnetic storm ,Physics::Atmospheric and Oceanic Physics - Abstract
Calculation of dynamic and thermal processes parameters during the severe magnetic storm of August 5–6, 2011 (Kp max=8−) are presented. The magnetic storm was accompanied by negative ionospheric disturbance over Kharkiv which caused a number of changes in ionosphere. Plasma heating was observed during electron concentration depression in the F-layer which was accompanied by changes in neutral atmosphere composition and ionospheric dynamics.
- Published
- 2014
21. Solar eclipse of August 1, 2008, above Kharkov: 1. Results of incoherent scatter observations
- Author
-
L. F. Chernogor, D. V. Kotov, L. Ya. Yemel’yanov, I. F. Domnin, and M. V. Lyashenko
- Subjects
Physics ,Electron density ,Solar eclipse ,Incoherent scatter ,Plasma ,Atmospheric sciences ,Geophysics ,Altitude ,Critical frequency ,Space and Planetary Science ,Physics::Space Physics ,Astrophysics::Earth and Planetary Astrophysics ,Ionosphere ,Eclipse - Abstract
The observation results of the effects in the geospace plasma during a partially (magnitude ∼0.42) solar eclipse are presented. The experimental data were obtained with an incoherent scatter radar of the Institute of the Ionosphere (near Kharkov). During the eclipse, the density at the F2 layer maximum decreased by 32%, the foF2 critical frequency decreased by 17.5%, and the altitude of the F2 layer maximum increased insignificantly. At altitudes of 290–680 km, the electron density decreased by ∼25%. During the eclipse, the electron and ion temperature decreased by 70–180 and 0–140 K, respectively, at altitudes of 190–490 km. Near the eclipse main phase, the plasma velocity vertical component decreased by 10–45 m/s at altitudes of 200–470 km, respectively. At the time of the eclipse main phase, the hydrogen ion fractional density increased by 50% as compared to the reference day at altitudes of 450–650 km.
- Published
- 2013
- Full Text
- View/download PDF
22. Results of radiophysical studies of the wave processes in the ionospheric plasma during its heating by high-power radio emission of the Sura facility
- Author
-
L. F. Chernogor, S. V. Panasenko, I. F. Domnin, and V. P. Uryadov
- Subjects
Physics ,Nuclear and High Energy Physics ,Disturbance (geology) ,Astronomy and Astrophysics ,Statistical and Nonlinear Physics ,Plasma ,Atmospheric sciences ,Geodesy ,F region ,Electronic, Optical and Magnetic Materials ,Power (physics) ,Internal gravity wave ,Electrical and Electronic Engineering ,Ionosphere ,Relative amplitude ,Atmospheric waveguide - Abstract
We present the results of observations of the wave disturbances in the ionospheric F region over the city of Kharkov, which accompanied the impact on the ionosphere by high-power radio emission of the Sura heating facility located about 960 km from the observation site. Enhancement of the wave activity in the heater operation intervals is detected. A 1.5–4-fold increase in the relative amplitude of the wave disturbance with a period of about 30 min close to the Sura operation mode at altitudes 160–235 km is revealed. The parameters of this disturbance are evaluated. It is shown that this effect can be due to the propagation of internal gravity waves in the atmospheric waveguide having about 200 km in height and 80–100 km in width. The efficiency of comprehensive analysis of the experimental data which we used to reveal and estimate the parameters of the wave disturbances with a small (a few percent) relative amplitude is demonstrated.
- Published
- 2012
- Full Text
- View/download PDF
23. Aperiodic large-scale disturbances in the ionospheric E region stimulated by high-power HF heating
- Author
-
I. F. Domnin, V. P. Uryadov, S. V. Panasenko, and L. F. Chernogor
- Subjects
Physics ,Nuclear and High Energy Physics ,Electron density ,Incoherent scatter ,Magnetosphere ,Astronomy and Astrophysics ,Statistical and Nonlinear Physics ,Electron ,Physics::Geophysics ,Electronic, Optical and Magnetic Materials ,law.invention ,Computational physics ,Atmosphere ,law ,Ionization ,Physics::Space Physics ,Electrical and Electronic Engineering ,Radar ,Ionosphere ,Physics::Atmospheric and Oceanic Physics - Abstract
We describe the observation results of ionospheric disturbances at altitudes of 100 to 140 km, which occurred at a distance of about 1000 km from the Sura facility. The observations have been made using the incoherent scatter radar located near Kharkov. The electron density increase by 10–70 % had a temporal duration of 10–20 min and accompanied the high-power HF heating. The time of disturbance evolution was about 10 min. The observation effect can be explained by the intensification of the subsystem coupling in the ionosphere–magnetosphere–upper atmosphere– ionosphere system, which leads to a precipitation of energetic electrons from the magnetosphere. Parameters of the precipitating particles and precipitation-produced ionization are estimated.
- Published
- 2012
- Full Text
- View/download PDF
24. DYNAMICS OF THE IONOSPHERIC PLASMA ABOVE KHARKIV DURING THE JANUARY 4, 2011 SOLAR ECLIPSE
- Author
-
I. F. Domnin, L. F. Chernogor, and Leonid Ya. Emelyanov
- Subjects
Physics ,Correlation function (statistical mechanics) ,Solar eclipse ,Dynamics (mechanics) ,General Medicine ,General Chemistry ,Plasma ,Ionosphere ,Atmospheric sciences ,Computational physics - Published
- 2012
- Full Text
- View/download PDF
25. Dynamic processes in the ionosphere during the very moderate magnetic storm on 20-21 January 2010
- Author
-
I. F. Domnin, S.A. Pazura, L. Ya. Emelyanov, S. V. Kharytonova, and L. F. Chernogor
- Subjects
Geomagnetic storm ,Meteorology ,Ionosphere ,Atmospheric sciences ,Geology - Published
- 2011
- Full Text
- View/download PDF
26. Variations in the parameters of scattered signals and the ionosphere connected with plasma modification by high-power radio waves
- Author
-
V. P. Burmaka, V. P. Uryadov, L. F. Chernogor, and I. F. Domnin
- Subjects
Physics ,Quantum optics ,Nuclear and High Energy Physics ,Electron density ,business.industry ,Incoherent scatter ,Astronomy and Astrophysics ,Statistical and Nonlinear Physics ,Plasma ,Physics::Geophysics ,Electronic, Optical and Magnetic Materials ,Power (physics) ,Optics ,Physics::Space Physics ,Ionospheric heater ,Electrical and Electronic Engineering ,Ionosphere ,business ,Radio wave - Abstract
We describe the results of using the incoherent scatter technique to observe time-altitude variations in regular parameters of the ionospheric plasma and wave disturbances, which accompanied periodic modification of the near-Earth plasma by radio waves emitted by the “Sura” facility. A distinctive feature of the experiments was that the processes in the ionosphere were diagnosed at a distance of about 1000 km from the facility. It was found that the spectrum composition of wave disturbances in the electron density was changing noticeably during the active experiment. Quasi-periodic processes in the ionosphere were observed with a delay of about 40–60 min. The relative amplitude of wave disturbances was equal to 0.02–0.10, and the periods were equal to 30, 60, 120, and 150–180 min. The observed effect can be explained by the generation and/or amplification of traveling ionospheric disturbances. The results of theoretical estimations agree well with the observational data.
- Published
- 2009
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.