Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 40866 10.12737/stp-71202106 Results of current research Results of current research Results of current research AIM-E auroral ionosphere model adjustment for the regular E layer AIM-E auroral ionosphere model adjustment for the regular E layer Николаева Вера Дмитриевна Nikolaeva Vera Dmitrievna vera_nik@list.ru Гордеев Евгений Иванович Gordeev Evgeniy Ivanovich evgeny.i.gordeev@spbu.ru Рогов Денис Дмитриевич Rogov Denis Dmitrievich rogovdenis@mail.ru Николаев Александр Валерьевич Nikolaev Aleksandr Valerevich demosfen.spb@gmail.com Арктический и антарктический научно-исследовательский институт Санкт-Петербург Россия Arctic and Antarctic Research Institute Saint Petersburg Russian Federation Институт земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН Москва Россия Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS Moscow Russian Federation Санкт-Петербургский государственный университет Санкт-Петербург Россия Saint Petersburg State University Saint Petersburg Russian Federation Арктический и антарктический научно-исследовательский институт Санкт-Петербург Россия Arctic and Antarctic Research Institute Saint Petersburg Russian Federation Институт земного магнетизма, ионосферы и распространения радиоволн им. Н.В. Пушкова РАН Москва Россия Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS Moscow Russian Federation Арктический и антарктический научно-исследовательский институт Санкт-Петербург Россия Arctic and Antarctic Research Institute Saint Petersburg Russian Federation 7 1 41 46 25 11 2020 11 02 2021 https://naukaru.ru/en/nauka/article/40866/view

The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km). Solar and magnetic activity input parameters for AIM-E are the three-hour Ap index and the daily solar radio flux at a wavelength of 10.7 cm (index F10.7). In this paper, we compare AIM-E calculations of the electron density for the daytime with EUV radiation spectrum specified in two different ways: 1) the EUV spectrum theoretically calculated using the F10.7 index as an input parameter; 2) using TIMED satellite direct measurements of the EUV spectrum. We have corrected the EUVAC EUV radiation model to specify a photoionization source in AIM-E. Calculations of regular E-region critical frequencies show good agreement with the vertical sounding data from Russian high-latitude stations. Results we obtained make it possible to do a quick on-line assessment of the regular E layer, using the daily index F10.7 as an input parameter.

The E-Region Auroral Ionosphere Model (AIM-E) was developed to determine the chemical composition and electron density in the auroral zone at E-layer heights (90–150 km). Solar and magnetic activity input parameters for AIM-E are the three-hour Ap index and the daily solar radio flux at a wavelength of 10.7 cm (index F10.7). In this paper, we compare AIM-E calculations of the electron density for the daytime with EUV radiation spectrum specified in two different ways: 1) the EUV spectrum theoretically calculated using the F10.7 index as an input parameter; 2) using TIMED satellite direct measurements of the EUV spectrum. We have corrected the EUVAC EUV radiation model to specify a photoionization source in AIM-E. Calculations of regular E-region critical frequencies show good agreement with the vertical sounding data from Russian high-latitude stations. Results we obtained make it possible to do a quick on-line assessment of the regular E layer, using the daily index F10.7 as an input parameter.

 high-latitude ionosphere auroral oval E layer numerical simulation EUV photoionization electron density high-latitude ionosphere auroral oval E layer numerical simulation EUV photoionization electron density

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