Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 109299 10.12737/stp-114202502 Results of current research Results of current research Results of current research Analyzing the behavior of mid-latitude upper atmosphere ionospheric plasma and airglow I630 from IS radar and Fabry—Perot interferometer data Analyzing the behavior of mid-latitude upper atmosphere ionospheric plasma and airglow I630 from IS radar and Fabry—Perot interferometer data https://orcid.org/0000-0001-8758-7964 Васильев Роман Валерьевич Vasilyev Roman Valeryevich roman_vasilyev@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-6795-3995 Едемский Илья Константинович Edemsky Ilya Konstantinovich ilya@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0009-0008-9992-1032 Шелков Алексей Дмитриевич Shelkov Aleksei Dmitrievich ekzereal@gmail.com Артамонов Максим Фёдорович Artamonov Maksim Fedorovich artamonov.maksim@iszf.irk.ru Алсаткин Сергей Сергеевич Alsatkin Sergei Sergeevich alss@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0009-0005-8850-6878 Евсеев Уйгулан Николаевич Evseev Uigulan Nikolaevich Evseev@ikfia.ysn.ru https://orcid.org/0000-0002-8662-9058 Лебедев Валентин Павлович Lebedev Valentin Pavlovich lebedev@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Ташлыков Виктор Петрович Tashlykov Viktor Petrovich vtashlykov@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Тащилин Анатолий Васильевич Tashchilin Anatoliy Vasilyevich avt@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 https://orcid.org/0000-0003-0576-5443 Тимченко Александр Владимирович Timchenko Aleksandr Vladimirovich aleksandr.timchenko77@gmail.com Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Иркутский государственный университет Irkutsk State University Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН Якутск Россия Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Yakutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Калининградский филиал Института земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН Калининград Россия West Department of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS Kaliningrad Russian Federation 10 12 2025 10 12 2025 11 4 29 38 27 03 2025 14 07 2025 https://zh-szf.ru/en/nauka/article/109299/view

The dynamics of the parameters of ionized and neutral components of Earth’s upper atmosphere at midlatitudes near the equinox was studied for several days under quiet geomagnetic conditions. The ionospheric parameters were obtained by an incoherent scatter radar; the parameters of the neutral atmosphere at ionospheric altitudes, from characteristics of the atomic oxygen glow at a wavelength of 630 nm with a Fabry—Perot interferometer. Synchronous variations similar in relative amplitudes were detected in the glow intensity and plasma concentration, the nature of which was explained using numerical modeling, as well as a combination of model and empirical data. It is shown that the vertical wind effect is of decisive importance for the vertical transport of plasma and the enhancement of the atomic oxygen glow in the period of time considered. The phenomenon under study was associated with the midnight temperature maximum, which was first observed at 52° N. A method for calibrating optical measurements using radiophysical data is presented in the approximation of the dominant role of plasma parameter variations over neutral atmosphere parameter variations.

The dynamics of the parameters of ionized and neutral components of Earth’s upper atmosphere at midlatitudes near the equinox was studied for several days under quiet geomagnetic conditions. The ionospheric parameters were obtained by an incoherent scatter radar; the parameters of the neutral atmosphere at ionospheric altitudes, from characteristics of the atomic oxygen glow at a wavelength of 630 nm with a Fabry—Perot interferometer. Synchronous variations similar in relative amplitudes were detected in the glow intensity and plasma concentration, the nature of which was explained using numerical modeling, as well as a combination of model and empirical data. It is shown that the vertical wind effect is of decisive importance for the vertical transport of plasma and the enhancement of the atomic oxygen glow in the period of time considered. The phenomenon under study was associated with the midnight temperature maximum, which was first observed at 52° N. A method for calibrating optical measurements using radiophysical data is presented in the approximation of the dominant role of plasma parameter variations over neutral atmosphere parameter variations.

 ionosphere thermosphere airglow electron density Fabry—Perot interferometer incoherent scatter radar numerical modeling neutral wind midnight temperature maximum ionosphere thermosphere airglow electron density Fabry—Perot interferometer incoherent scatter radar numerical modeling neutral wind midnight temperature maximum The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Subsidy No. 075-GZ/Ts3569/278) The work was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Subsidy No. 075-GZ/Ts3569/278)

Alken P., Maus S., Emmert J., Drob D.P. Improved horizontal wind model HWM07 enables estimation of equatorial ionospheric electric fields from satellite magnetic measurements. Geophys. Res. Lett. 2008, vol. 35, no. 11. DOI: 10.1029/2008GL033580. Alken P., Maus S., Emmert J., Drob D.P. Improved horizontal wind model HWM07 enables estimation of equatorial ionospheric electric fields from satellite magnetic measurements. Geophys. Res. Lett. 2008, vol. 35, no. 11. DOI: 10.1029/2008GL033580. Alsatkin S.S., Medvedev A.V., Ratovsky K.G. Some peculiarities in the ionosphere dynamics near the ionization maximum from Irkutsk incoherent scatter radar data for low and moderate solar activities. Sol.-Terr. Phys. 2015, vol. 1, no. 3, pp. 28–36, DOI: 10.12737/11450. Alsatkin S.S., Medvedev A.V., Ratovsky K.G. Some peculiarities in the ionosphere dynamics near the ionization maximum from Irkutsk incoherent scatter radar data for low and moderate solar activities. Sol.-Terr. Phys. 2015, vol. 1, no. 3, pp. 28–36, DOI: 10.12737/11450. Afraimovich E.L., Zherebtsov G.A., Perevalova N.P. Seismo-Ionospheric and Seismo-Electromagnetic Processes in Baikal Rift Valley. Novosibirsk, SB RAS, 2012, 304 p. (In Russian). Afraimovich E.L., Zherebtsov G.A., Perevalova N.P. Seismo-Ionospheric and Seismo-Electromagnetic Processes in Baikal Rift Valley. Novosibirsk, SB RAS, 2012, 304 p. (In Russian). Berrington K.A., Burke P.G. Effective collision strengths for forbidden transitions in e − N and e − O scattering, Planet. Space Sci. 1981, vol. 29, iss. 3, pp. 377–381. DOI: 10.1016/0032-0633(81)90026-X. Berrington K.A., Burke P.G. Effective collision strengths for forbidden transitions in e − N and e − O scattering, Planet. Space Sci. 1981, vol. 29, iss. 3, pp. 377–381. DOI: 10.1016/0032-0633(81)90026-X. Bilitza D., Pezzopane M., Truhlik V., et al. The International Reference Ionosphere model: A review and description of an ionospheric benchmark. Rev. Geophys. 2022, vol. 60, iss. 4. DOI: 10.1029/2022RG000792. Bilitza D., Pezzopane M., Truhlik V., et al. The International Reference Ionosphere model: A review and description of an ionospheric benchmark. Rev. Geophys. 2022, vol. 60, iss. 4. DOI: 10.1029/2022RG000792. Bryunelli B.E., Namgaladze A.A. Ionosphere Physics. Moscow, Nauka, 1988, 526 p. (In Russian). Bryunelli B.E., Namgaladze A.A. Ionosphere Physics. Moscow, Nauka, 1988, 526 p. (In Russian). Cedric M.V., Podlesny A.V., Kurkin V.I. Three-position reception of signals with linear frequency modulation during slightly-inclined ionospheric sounding. Proc. of All-Russian Open Scientific Conference “Modern Problems of Waves Remote Sensing, Radiolocation, Propagation and Diffraction”], Murom, 2022, pp. 223–229. DOI: 10.24412/2304-0297-2022-1-223-229. (In Russian). Cedric M.V., Podlesny A.V., Kurkin V.I. Three-position reception of signals with linear frequency modulation during slightly-inclined ionospheric sounding. Proc. of All-Russian Open Scientific Conference “Modern Problems of Waves Remote Sensing, Radiolocation, Propagation and Diffraction”], Murom, 2022, pp. 223–229. DOI: 10.24412/2304-0297-2022-1-223-229. (In Russian). Colerico M.J., Mendillo M. The current state of investigations regarding the thermospheric midnight temperature maximum (MTM). J. Atmos. Sol.-Terr. Phys. 2002, vol. 64, pp. 1361–1369. Colerico M.J., Mendillo M. The current state of investigations regarding the thermospheric midnight temperature maximum (MTM). J. Atmos. Sol.-Terr. Phys. 2002, vol. 64, pp. 1361–1369. Doering J.P. Absolute differential and integral electron excitation cross sections for atomic oxygen: 9. Improved cross section for the ³P → ¹D transition from 4.0 to 30 eV. J. Geophys. Res. 1992, vol. 97, iss. A12, pp. 19531–19534. DOI: 10.1029/92JA02007. Doering J.P. Absolute differential and integral electron excitation cross sections for atomic oxygen: 9. Improved cross section for the ³P → ¹D transition from 4.0 to 30 eV. J. Geophys. Res. 1992, vol. 97, iss. A12, pp. 19531–19534. DOI: 10.1029/92JA02007. Duann Y., Chang L.C., Chiu Y.-C., et al. Atomic oxygen ion retrieval from 630.0 nm airglow during geomagnetically quiet periods: a mid-latitude case study near Irkutsk. Geoscience. Lett. 2024, vol. 11, no. 55. DOI: 10.1186/s40562-024-00370-6. Duann Y., Chang L.C., Chiu Y.-C., et al. Atomic oxygen ion retrieval from 630.0 nm airglow during geomagnetically quiet periods: a mid-latitude case study near Irkutsk. Geoscience. Lett. 2024, vol. 11, no. 55. DOI: 10.1186/s40562-024-00370-6. Emmert J.T., Jones Jr. M., Siskind D.E., et al. NRLMSIS 2.1: An empirical model of nitric oxide incorporated into MSIS. J. Geophys. Res.: Space Phys. 2022, vol. 127, iss. 10. DOI: 10.1029/2022JA030896. Emmert J.T., Jones Jr. M., Siskind D.E., et al. NRLMSIS 2.1: An empirical model of nitric oxide incorporated into MSIS. J. Geophys. Res.: Space Phys. 2022, vol. 127, iss. 10. DOI: 10.1029/2022JA030896. Garcia F.J., Kelley M.C., Makela J.J., Huang C.-S. Airglow observations of mesoscale low-velocity traveling ionospheric disturbances at midlatitudes. J. Geophys. Res. 2000, vol. 105, iss. A8, pp. 18407–18415. DOI: 10.1029/1999JA000305. Garcia F.J., Kelley M.C., Makela J.J., Huang C.-S. Airglow observations of mesoscale low-velocity traveling ionospheric disturbances at midlatitudes. J. Geophys. Res. 2000, vol. 105, iss. A8, pp. 18407–18415. DOI: 10.1029/1999JA000305. Grigoryev S.A., Latyshev K.S. Non-stationary processes in geomagnetic force tubes. Numerical methods analysis. Matematicheskoe modelirovanie [Mathematical modeling]. 1989, vol. 1, iss. 9, pp. 141–150. (In Russian). Grigoryev S.A., Latyshev K.S. Non-stationary processes in geomagnetic force tubes. Numerical methods analysis. Matematicheskoe modelirovanie [Mathematical modeling]. 1989, vol. 1, iss. 9, pp. 141–150. (In Russian). Harding B.J., Gehrels T.W., Makela J.J. Nonlinear regression method for estimating neutral wind and temperature from Fabry-Perot interferometer data. App. Optics. 2014, vol. 53, iss. 4, pp. 666–673. DOI: 10.1364/AO.53.000666. Harding B.J., Gehrels T.W., Makela J.J. Nonlinear regression method for estimating neutral wind and temperature from Fabry-Perot interferometer data. App. Optics. 2014, vol. 53, iss. 4, pp. 666–673. DOI: 10.1364/AO.53.000666. Hargreaves J. K. Upper Atmosphere and Solar-Terrestrial Interactions: Introduction to Near-Earth Space Physics. Leningrad, Gidrometeoizdat, 1982, 352 p. (In Russian). Hargreaves J. K. Upper Atmosphere and Solar-Terrestrial Interactions: Introduction to Near-Earth Space Physics. Leningrad, Gidrometeoizdat, 1982, 352 p. (In Russian). Kernahan J.H., Pang P.H.-L. Experimental determination of absolute A coefficients for “forbidden” atomic oxygen lines. Can. J. Phys. 1975, vol. 53, iss. 5, pp. 455–458. Kernahan J.H., Pang P.H.-L. Experimental determination of absolute A coefficients for “forbidden” atomic oxygen lines. Can. J. Phys. 1975, vol. 53, iss. 5, pp. 455–458. Korenkov Yu.N., Klimenko V.V., Förster M., et al. Global modelling study (GSM TIP) of the ionospheric effects of excited N2, convection and heat fluxes by comparison with EISCAT and satellite data for 31 July 1990. Ann. Geophys. 1996, vol. 14, iss. 12, pp. 1362–1374. DOI: 10.1007/s00585-996-1362-2. Korenkov Yu.N., Klimenko V.V., Förster M., et al. Global modelling study (GSM TIP) of the ionospheric effects of excited N2, convection and heat fluxes by comparison with EISCAT and satellite data for 31 July 1990. Ann. Geophys. 1996, vol. 14, iss. 12, pp. 1362–1374. DOI: 10.1007/s00585-996-1362-2. Krinberg I.A., Tashcilin M.A. Ionosfera i plasmosfera [Ionosphere and Plasmasphere]. Moscow: Nauka, 1984, 189 p. (In Russian). Krinberg I.A., Tashcilin M.A. Ionosfera i plasmosfera [Ionosphere and Plasmasphere]. Moscow: Nauka, 1984, 189 p. (In Russian). Link R., Cogger L. A reexamination of the OI 6300 angstrom nightglow. J. Geophys. Res. 1988, vol. 93, iss. A9, pp. 9883–9892. Link R., Cogger L. A reexamination of the OI 6300 angstrom nightglow. J. Geophys. Res. 1988, vol. 93, iss. A9, pp. 9883–9892. Mantas G.P. Large 6300 Å airglow intensity enhancements observed in ionosphere heating experiments are excited by thermal electrons. J. Geophys. Res. 1994, vol. 99, iss. A5, pp. 8993–9002. DOI: 10.1029/94JA00347. Mantas G.P. Large 6300 Å airglow intensity enhancements observed in ionosphere heating experiments are excited by thermal electrons. J. Geophys. Res. 1994, vol. 99, iss. A5, pp. 8993–9002. DOI: 10.1029/94JA00347. Mesquita R.L.A., Meriwether J.W., Makela J.J., et al. New results on the mid-latitude midnight temperature maximum. Ann. Geophys. 2018, vol. 36, iss. 2, pp. 541–553. DOI: 10.5194/angeo-36-541-2018. Mesquita R.L.A., Meriwether J.W., Makela J.J., et al. New results on the mid-latitude midnight temperature maximum. Ann. Geophys. 2018, vol. 36, iss. 2, pp. 541–553. DOI: 10.5194/angeo-36-541-2018. Mikhalev A.V. Seasonal and interannual variations in the [OI] 630 nm atmospheric emission as derived from observations over Eastern Siberia in 2011–2017. Sol.-Terr. Phys. 2018, vol. 4, no. 2, pp. 58–62. DOI: 10.12737/stp-42201809. Mikhalev A.V. Seasonal and interannual variations in the [OI] 630 nm atmospheric emission as derived from observations over Eastern Siberia in 2011–2017. Sol.-Terr. Phys. 2018, vol. 4, no. 2, pp. 58–62. DOI: 10.12737/stp-42201809. Namgaladze A.A., Zaharov L.P., Namgaladze A.N. Ionosphere storms numerical modeling. Geomagnetizm i aeronomia [Geomagnetism and aeronomy]. 1981, vol. 21, iss. 2, pp. 259–265. (In Russian). Namgaladze A.A., Zaharov L.P., Namgaladze A.N. Ionosphere storms numerical modeling. Geomagnetizm i aeronomia [Geomagnetism and aeronomy]. 1981, vol. 21, iss. 2, pp. 259–265. (In Russian). Otsuka Y., Kadota T., Shiokawa K., et al. Optical and radio measurements of a 630 nm airglow enhancement over Japan on 9 September 1999. J. Geophys. Res. 2003, vol. 108, iss. A6, p. 1252. DOI: 10.1029/2002JA009594. Otsuka Y., Kadota T., Shiokawa K., et al. Optical and radio measurements of a 630 nm airglow enhancement over Japan on 9 September 1999. J. Geophys. Res. 2003, vol. 108, iss. A6, p. 1252. DOI: 10.1029/2002JA009594. Picone J.M., Hedin A.E., Drob D.P., Aikin A.C. NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. J. Geophys. Res. 2002, vol. 107, iss. A12, p. 1468. DOI: 10.1029/2002JA009430. Picone J.M., Hedin A.E., Drob D.P., Aikin A.C. NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues. J. Geophys. Res. 2002, vol. 107, iss. A12, p. 1468. DOI: 10.1029/2002JA009430. Podlesny S.V., Devyatova E.V., Saunkin A.V., Vasilyev R.V. Comparing methods to estimate cloud cover over the Baikal natural territory in December 2020. Sol.-Terr. Phys. 2022, vol. 8, no. 4, pp. 95–102. DOI: 10.12737/stp-84202210. Podlesny S.V., Devyatova E.V., Saunkin A.V., Vasilyev R.V. Comparing methods to estimate cloud cover over the Baikal natural territory in December 2020. Sol.-Terr. Phys. 2022, vol. 8, no. 4, pp. 95–102. DOI: 10.12737/stp-84202210. Ratovsky K.G., Oinats A.V. Local empirical model of ionospheric plasma density derived from digisonde measurements at Irkutsk. Earth, Planets and Space. 2011, vol. 63, pp. 351–357. DOI: 10.5047/eps.2011.03.002. Ratovsky K.G., Oinats A.V. Local empirical model of ionospheric plasma density derived from digisonde measurements at Irkutsk. Earth, Planets and Space. 2011, vol. 63, pp. 351–357. DOI: 10.5047/eps.2011.03.002. Rishbeth H. Basic physics of the ionosphere: a tutorial review. J. of the Institution of Electronic and Radio Engineers. 1988, vol. 58, iss. 6S, pp. 207–223. DOI: 10.1049/jiere.1988.0060. Rishbeth H. Basic physics of the ionosphere: a tutorial review. J. of the Institution of Electronic and Radio Engineers. 1988, vol. 58, iss. 6S, pp. 207–223. DOI: 10.1049/jiere.1988.0060. Shcherbakov A.A., Medvedev A.V., Kushnarev D.S., et al. Calculation of meridional neutral winds in middle latitudes from the Irkutsk Incoherent Scatter Radar data. Sol.-Terr. Phys. 2015, vol. 1, no. 3, pp. 37–48. DOI: 10.12737/10962. Shcherbakov A.A., Medvedev A.V., Kushnarev D.S., et al. Calculation of meridional neutral winds in middle latitudes from the Irkutsk Incoherent Scatter Radar data. Sol.-Terr. Phys. 2015, vol. 1, no. 3, pp. 37–48. DOI: 10.12737/10962. Shefov N.N., Semenov A.I., Khomich V.Yu. Upper atmosphere airglow — its structure and dynamics indicator. Moscow: GEOS, 2006, 741 p. (In Russian). Shefov N.N., Semenov A.I., Khomich V.Yu. Upper atmosphere airglow — its structure and dynamics indicator. Moscow: GEOS, 2006, 741 p. (In Russian). Shepherd G.G., Siddiqi N.J., Wiens R.H., Zhang S. Airglow measurements of possible changes in the ionosphere and middle atmosphere. Adv. Space Res. 1997, vol. 20, iss. 11, pp. 2127–2135. DOI: 10.1016/S0273-1177(97)00605-4. Shepherd G.G., Siddiqi N.J., Wiens R.H., Zhang S. Airglow measurements of possible changes in the ionosphere and middle atmosphere. Adv. Space Res. 1997, vol. 20, iss. 11, pp. 2127–2135. DOI: 10.1016/S0273-1177(97)00605-4. Tashchilin A.V., Leonovich L.A. Modeling nightglow in atomic oxygen red and green lines under moderate disturbed geomagnetic conditions at midlatitudes. Sol.-Terr. Phys. 2016, vol. 2, no. 4, pp. 94–106. DOI: 10.12737/21491. Tashchilin A.V., Leonovich L.A. Modeling nightglow in atomic oxygen red and green lines under moderate disturbed geomagnetic conditions at midlatitudes. Sol.-Terr. Phys. 2016, vol. 2, no. 4, pp. 94–106. DOI: 10.12737/21491. Van Zandt T.E. III-3 — The neutral atmosphere and the quiet ionosphere. International Geophysics. 1967, vol. 11, iss. 1, pp. 509–559. DOI: 10.1016/B978-0-12-480301-5.50015-X. Van Zandt T.E. III-3 — The neutral atmosphere and the quiet ionosphere. International Geophysics. 1967, vol. 11, iss. 1, pp. 509–559. DOI: 10.1016/B978-0-12-480301-5.50015-X. Vasilyev R.V., Artamonov M.F., Beletsky A.B., et al. Registering upper atmosphere parameters in East Siberia with Fabry — Perot interferometer KEO Scientific “Arinae”. Sol.-Terr. Phys. 2017, vol. 3, no. 3, pp. 61–75. DOI: 10.12737/stp-33201707. Vasilyev R.V., Artamonov M.F., Beletsky A.B., et al. Registering upper atmosphere parameters in East Siberia with Fabry — Perot interferometer KEO Scientific “Arinae”. Sol.-Terr. Phys. 2017, vol. 3, no. 3, pp. 61–75. DOI: 10.12737/stp-33201707. Vasilyev R.V., Artamonov M.F., Beletsky A.B., et al. Scientific goals of optical instruments of the National Heliogeophysical Complex. Sol.-Terr. Phys. 2020, vol. 6, iss. 2, pp. 84–97, DOI: 10.12737/stp-62202008. Vasilyev R.V., Artamonov M.F., Beletsky A.B., et al. Scientific goals of optical instruments of the National Heliogeophysical Complex. Sol.-Terr. Phys. 2020, vol. 6, iss. 2, pp. 84–97, DOI: 10.12737/stp-62202008. Watanabe K., Ashour-Abdalla M., Sato T. A numerical model of magnetosphere-ionosphere coupling: Preliminary results. J. Geophys. Res. 1986, vol. 91, iss. A6, pp. 6973–6978. DOI: 10.1029/JA091iA06p06973. Watanabe K., Ashour-Abdalla M., Sato T. A numerical model of magnetosphere-ionosphere coupling: Preliminary results. J. Geophys. Res. 1986, vol. 91, iss. A6, pp. 6973–6978. DOI: 10.1029/JA091iA06p06973. Weinstock J. Theory of enhanced airglow during ionospheric modifications. J. Geophys. Res. 1975, vol. 80, iss. 31, pp. 4331–4345. DOI: 10.1029/JA080i031p04331. Weinstock J. Theory of enhanced airglow during ionospheric modifications. J. Geophys. Res. 1975, vol. 80, iss. 31, pp. 4331–4345. DOI: 10.1029/JA080i031p04331. Zherebtsov G.A. Complex of heliogeophysical instruments of new generation. Sol.-Terr. Phys. 2020, vol. 6, no. 2, pp. 3-13. DOI: 10.12737/stp-62202001. Zherebtsov G.A. Complex of heliogeophysical instruments of new generation. Sol.-Terr. Phys. 2020, vol. 6, no. 2, pp. 3-13. DOI: 10.12737/stp-62202001. Zherebtsov G.A., Zavorin A.V., Medvedev A.V., et al. Irkutsk incoherent scatter radar. Radiotehnika i elektronika [Radio Engineering and Electronics]. 2002, vol. 47, no. 11, pp. 1339–1345. (In Russian). Zherebtsov G.A., Zavorin A.V., Medvedev A.V., et al. Irkutsk incoherent scatter radar. Radiotehnika i elektronika [Radio Engineering and Electronics]. 2002, vol. 47, no. 11, pp. 1339–1345. (In Russian). Zwillinger D., Kokoska S. CRC Standard Probability and Statistics. Tables and Formulae. New York, Chapman & Hall, 2000, 537 p. Zwillinger D., Kokoska S. CRC Standard Probability and Statistics. Tables and Formulae. New York, Chapman & Hall, 2000, 537 p. URL: https://ckp-rf.ru/catalog/usu/4138180/ (accessed October 2, 2025). URL: https://ckp-rf.ru/catalog/usu/4138180/ (accessed October 2, 2025). URL: https://ckp-rf.ru/catalog/usu/77733/ (accessed October 2, 2025). URL: https://ckp-rf.ru/catalog/usu/77733/ (accessed October 2, 2025).