Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence

Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence

Observations of temporal variations in the spectra of Doppler shift in 3.2-MHz and 4.2- MHz radio waves reflected from the ionosphere are presented. The diurnal variation of such observations made around an autumn equinox has been analyzed. Quasi-periodic and aperiodic processes associated with the...

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Дата:2012
Автори: Garmash, K. P., Leus, S. G., Panasenko, S. V., Chernogor, L. F.
Формат: Стаття
Мова:rus
Опубліковано: Видавничий дім «Академперіодика» 2012
Онлайн доступ:http://rpra-journal.org.ua/index.php/ra/article/view/452
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Назва журналу:Radio physics and radio astronomy

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Radio physics and radio astronomy
id oai:ri.kharkov.ua:article-452
record_format ojs
spelling oai:ri.kharkov.ua:article-4522012-11-10T21:17:54Z Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence Вариации характеристик радиоволн низкочастотной части декаметрового диапазона на квазивертикальных радиотрассах Garmash, K. P. Leus, S. G. Panasenko, S. V. Chernogor, L. F. Observations of temporal variations in the spectra of Doppler shift in 3.2-MHz and 4.2- MHz radio waves reflected from the ionosphere are presented. The diurnal variation of such observations made around an autumn equinox has been analyzed. Quasi-periodic and aperiodic processes associated with the solar terminator and with ionospheric heating by high-power HF periodic transmissions from the SURA facility have been detected. The periods and amplitudes of quasi-periodic processes agree with the parameters of internal gravity waves. The on/off switching of the high-power transmission is associated with an enhancement of quasi-periodic processes acting in the ionosphere, as well as with an electron density increase. The latter is most likely associated with energetic electron precipitation from the magnetosphere at midlatitudes. Приведены результаты наблюдений за временными вариациями доплеровских спектров и амплитуд сигналов отраженных от ионосферы радиоволн частотой 3.2 и 4.2 МГц. Проанали- зирована суточная зависимость этих вариаций в период осеннего равноденствия. Выявлены квазипериодические и апериодические процессы, сопровождавшие движение солнечного терми- натора и периодический нагрев ионосферной плазмы мощным ВЧ радиоизлучением стенда “Сура”. Периоды и амплитуды квазипериодических процессов соответствовали параметрам внутренних гравитационных волн. Включение/выключение мощного радиоизлучения сопровождалось усиле- нием квазипериодических процессов в ионосфере, а также увеличением концентрации электронов. Последнее, скорее всего, связано со среднеширотным высыпанием высокоэнергичных электро- нов из магнитосферы. Видавничий дім «Академперіодика» 2012-11-10 Article Article application/pdf http://rpra-journal.org.ua/index.php/ra/article/view/452 РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ; Vol 16, No 1 (2011); 43 RADIO PHYSICS AND RADIO ASTRONOMY; Vol 16, No 1 (2011); 43 РАДІОФІЗИКА І РАДІОАСТРОНОМІЯ; Vol 16, No 1 (2011); 43 2415-7007 1027-9636 rus http://rpra-journal.org.ua/index.php/ra/article/view/452/16
institution Radio physics and radio astronomy
collection OJS
language rus
format Article
author Garmash, K. P.
Leus, S. G.
Panasenko, S. V.
Chernogor, L. F.
spellingShingle Garmash, K. P.
Leus, S. G.
Panasenko, S. V.
Chernogor, L. F.
Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
author_facet Garmash, K. P.
Leus, S. G.
Panasenko, S. V.
Chernogor, L. F.
author_sort Garmash, K. P.
title Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
title_short Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
title_full Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
title_fullStr Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
title_full_unstemmed Variations of Radio Wave Characteristics in Low-Frequency Portion of Decameter Wavelengths at Quasi-Vertical Incidence
title_sort variations of radio wave characteristics in low-frequency portion of decameter wavelengths at quasi-vertical incidence
title_alt Вариации характеристик радиоволн низкочастотной части декаметрового диапазона на квазивертикальных радиотрассах
description Observations of temporal variations in the spectra of Doppler shift in 3.2-MHz and 4.2- MHz radio waves reflected from the ionosphere are presented. The diurnal variation of such observations made around an autumn equinox has been analyzed. Quasi-periodic and aperiodic processes associated with the solar terminator and with ionospheric heating by high-power HF periodic transmissions from the SURA facility have been detected. The periods and amplitudes of quasi-periodic processes agree with the parameters of internal gravity waves. The on/off switching of the high-power transmission is associated with an enhancement of quasi-periodic processes acting in the ionosphere, as well as with an electron density increase. The latter is most likely associated with energetic electron precipitation from the magnetosphere at midlatitudes.
publisher Видавничий дім «Академперіодика»
publishDate 2012
url http://rpra-journal.org.ua/index.php/ra/article/view/452
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first_indexed 2024-05-26T06:33:06Z
last_indexed 2024-05-26T06:33:06Z
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