Cosmic ResearchCosmic ResearchКосмические исследования0023-42063034-5502The Russian Academy of Sciences67256510.31857/S0023420623600204CFXKDAArticlesСтатьиUnknownFeatures of Narrowband Stimulated Electromagnetic Emission Depending on the Effective Radiated Power of the EISCAT/Heating FacilityХарактеристики узкополосного искусственного радиоизлучения ионосферы в зависимости от эффективной мощности излучения нагревного стенда EISCAT/HeatingKalishinA. S.КалишинА. С.askalishin@aari.ruBlagoveshchenskayaN. F.БлаговещенскаяН. Ф.askalishin@aari.ruBorisovaT D.БорисоваТ. Д.askalishin@aari.ruEgorovI. M.ЕгоровИ. М.askalishin@aari.ruZagorskiyG. A.ЗагорскийГ. А.askalishin@aari.ruKovalevA. S.КовалевА. С.askalishin@aari.ruArctic and Antarctic Research Institute, 199397, St. Petersburg, RussiaАрктический и антарктический научно-исследовательский институт0111202361647648527022025Copyright ©; 2023, А.С. Калишин, Н.Ф. Благовещенская, Т.Д. Борисова, И.М. Егоров, Г.А. Загорский, А.С. КовалевCopyright ©; 2023, А.С. Калишин, Н.Ф. Благовещенская, Т.Д. Борисова, И.М. Егоров, Г.А. Загорский, А.С. Ковалев2023А.С. Калишин, Н.Ф. Благовещенская, Т.Д. Борисова, И.М. Егоров, Г.А. Загорский, А.С. КовалевА.С. Калишин, Н.Ф. Благовещенская, Т.Д. Борисова, И.М. Егоров, Г.А. Загорский, А.С. Ковалевhttps://journals.eco-vector.com/0023-4206/article/view/672565

Estimates of excitation thresholds and the analysis of spectral features of narrowband stimulated electromagnetic emission (NSEE) depending on the electric-field intensity of an extraordinary polarized HF pump wave have been carried out. They are based on results obtained during power stepping EISCAT/Heating experiments. The HF pump wave was radiated toward the magnetic zenith at frequency of 5.423 MHz. The effective radiated power was changed from 55 to 360 MW. NSEE was recorded in the vicinity of St. Petersburg at a distance of ~1200 km away of the EISCAT/Heating facility. Calculations of the electric field of a powerful HF radio wave near the reflection altitude taking into account the nondeviation absorption in the underlying layers were performed. The threshold (minimum) values of the electric field required for the NSEE excitation were determined.

По данным экспериментов на нагревном стенде EISCAT/Heating при ступенчатом изменении эффективной мощности излучения выполнена оценка порогов возбуждения и анализ зависимости спектральных характеристик узкополосного искусственного радиоизлучения ионосферы (УИРИ) от напряженности электрического поля мощной радиоволны КВ-диапазона (волны накачки) необыкновенной поляризации (Х-мода). Волны накачки излучались в направлении магнитного зенита на частоте 5.423 МГц. Эффективная мощность излучаемой волны изменялась от 55 до 360 МВт. УИРИ регистрировалось на научно-исследовательской станции под Санкт-Петербургом на расстоянии ∼1200 км от нагревного стенда. Выполнены расчеты напряженности электрического поля мощного КВ-излучения вблизи высоты отражения с учетом неотклоняющего поглощения на пути распространения. Определены пороговые (минимальные) значения электрического поля, необходимые для возбуждения УИРИ.

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