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The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals

Numerical simulations have been made of decametric wave Doppler shift and a focusing factor due to cnoidal waves of electron concentration progressing in the terrestrial ionosphere. The solutions of the Korteweg–de Vries equation are used to model the nonlinear waves. The nonlinear wave parameters (...

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Main Authors:	Pushin, V. F., Chernogor, L. F.
Format:	Article
Language:	rus
Published:	Видавничий дім «Академперіодика» 2012
Online Access:	http://rpra-journal.org.ua/index.php/ra/article/view/520
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spelling	oai:ri.kharkov.ua:article-5202012-12-23T17:39:35Z The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals Эффекты ионосферных декаметровых радиосигналов, вызванные распространением кноидальных волн концентрации электронов Pushin, V. F. Chernogor, L. F. Numerical simulations have been made of decametric wave Doppler shift and a focusing factor due to cnoidal waves of electron concentration progressing in the terrestrial ionosphere. The solutions of the Korteweg–de Vries equation are used to model the nonlinear waves. The nonlinear wave parameters (the relative amplitude of electron concentration disturbances and the period) are determined from observations. Calculations are performed for various sounding frequencies and wave polarizations, for nighttime and daytime ionosphere models. The Doppler shift and the focusing factor are shown to be large enough to be detected. The passage of cnoidal waves gives rise to characteristic Doppler shifts and focusing factors, which permits their detection with other variations in the background.Comparisons between measurement data and calculations are presented. The main characteristics of a cnoidal wave are determined from observations. Проведено численное моделирование доплеровского смещения частоты (ДСЧ) и фактора фокусировки (ФФ) декаметровых радиосигналов, вызванных распространением в ионосфере Земли кноидальных волн концентрации электронов. В качестве модели нелинейных волн выбраны решения эталонного уравнения – уравнения Кортевега–де Вриза. Параметры нелинейных волн (относительная амплитуда возмущений концентрации электронов и период) задавались, исходя из результатов наблюдений. Расчеты выполнены для различных частот и поляризаций зондирующей волны, дневной и ночной моделей ионосферы. Показано, что значения ДСЧ и ФФ вполне достаточны для их измерения. Прохождение кноидальных волн приводит к характерным вариациям ДСЧ и ФФ, что позволяет выделить их на фоне других вариаций. Описаны результаты сопоставления расчетных и экспериментальных данных. Из данных наблюдений определены основные параметры кноидальной волны. Видавничий дім «Академперіодика» 2012-12-08 Article Article application/pdf http://rpra-journal.org.ua/index.php/ra/article/view/520 РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ; Vol 14, No 2 (2009); 150 RADIO PHYSICS AND RADIO ASTRONOMY; Vol 14, No 2 (2009); 150 РАДІОФІЗИКА І РАДІОАСТРОНОМІЯ; Vol 14, No 2 (2009); 150 2415-7007 1027-9636 rus http://rpra-journal.org.ua/index.php/ra/article/view/520/85
institution	Radio physics and radio astronomy
collection	OJS
language	rus
format	Article
author	Pushin, V. F. Chernogor, L. F.
spellingShingle	Pushin, V. F. Chernogor, L. F. The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
author_facet	Pushin, V. F. Chernogor, L. F.
author_sort	Pushin, V. F.
title	The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
title_short	The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
title_full	The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
title_fullStr	The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
title_full_unstemmed	The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals
title_sort	ionospheric effects that cnoidal electron density waves have on decametric radio signals
title_alt	Эффекты ионосферных декаметровых радиосигналов, вызванные распространением кноидальных волн концентрации электронов
description	Numerical simulations have been made of decametric wave Doppler shift and a focusing factor due to cnoidal waves of electron concentration progressing in the terrestrial ionosphere. The solutions of the Korteweg–de Vries equation are used to model the nonlinear waves. The nonlinear wave parameters (the relative amplitude of electron concentration disturbances and the period) are determined from observations. Calculations are performed for various sounding frequencies and wave polarizations, for nighttime and daytime ionosphere models. The Doppler shift and the focusing factor are shown to be large enough to be detected. The passage of cnoidal waves gives rise to characteristic Doppler shifts and focusing factors, which permits their detection with other variations in the background.Comparisons between measurement data and calculations are presented. The main characteristics of a cnoidal wave are determined from observations.
publisher	Видавничий дім «Академперіодика»
publishDate	2012
url	http://rpra-journal.org.ua/index.php/ra/article/view/520
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first_indexed	2024-05-26T06:32:25Z
last_indexed	2024-05-26T06:32:25Z
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The Ionospheric Effects that Cnoidal Electron Density Waves Have on Decametric Radio Signals

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