Ionospheric Prediction and Forecasting

Zolesi, B.; Cander, Ljiljana R.

doi:10.1007/978-3-642-38430-1

Cited by 121 publications

(91 citation statements)

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“…Walden [49] reports that several propagation prediction models neglect the effect of the extraordinary wave. In [50] basic recommendations and formula for ionospheric propagation prediction are provided, and in [51] a state-of-the-art ionospheric prediction model is described. Combination of ionospheric parameters measured in real time with ray-tracing software using the International Reference Ionosphere (IRI) model [52,53] makes improved short-term propagation predictions possible.…”

Section: Propagation Predictionmentioning

confidence: 99%

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

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Section: Propagation Predictionmentioning

confidence: 99%

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Witvliet

Alsina-Pagès

2017

Telecommun Syst

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“…Along with the solar activity index F 12 , the index R 12 -the relative number of sunspots averaged over 12 months (centered on a given month) -is used in problems of long-term ionospheric forecasting [Zolesi, Cander, 2014]. The index F 12 is more accurate than R 12 for constructing the f o F2 median [Deminov, 2016].…”

Section: Methodsmentioning

confidence: 99%

“…The average monthly median of the F2-layer critical frequency f o F2 med is considered to be an optimal characteristic of the F2-layer critical frequency for long-term ionospheric forecasting [Zolesi, Cander, 2014]. For example, the basic version of the international reference ionosphere IRI gives exactly f o F2 med [Bilitza et al, 2014].…”

Section: Introductionmentioning

confidence: 99%

Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity

Dëminov¹,

Deminova²,

Depuev³

et al. 2017

Solar-Terrestrial Physics

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Abstract. We put forward a method of separating the geomagnetic activity contribution to the F2-layer critical frequency median, f o F2 med , at middle latitudes. It is based on the analysis of δf o F2, which is the ratio f o F2 med /f o F2 q in percent, where f o F2 q is the F2-layer critical frequency for quiet conditions. The quantities f o F2 q and δf o F2 depend on solar and geomagnetic activity respectively. These dependences are taken into account using indices F 12 (annual average solar radio emission flux at 10.7 cm) and Ap m (monthly average Ap index), thus facilitating the use of this method for forecasting f o F2 med . With this method, from Slough station (51.5° N, 0.6° W) data for midday and midnight for 1954 to 1995 we have found that at midnight the δf o F2 dependence on Ap m is significant at the 95 % confidence level for equinoxes and summer. For midday, this dependence is less pronounced and is significant only from April to July. At equinoxes and summer, an Ap m increase causes a δf o F2 decrease. For midnight, this feature is more pronounced than for midday. This regularity is also valid for annual average Ap m and δf o F2.

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“…Для корректного ре-шения задачи распространения сигнала необходимо знать среду распространения или по крайней мере иметь хорошую ее модель. Существуют различные модели для прогноза и коррекции характеристик распространения в приложении к различным радио-системам (например, IONCAP, VOACAP, ICEPAC, ASAPS), в основном ориентированные на прогноз различных ионосферных характеристик [Zolesi, Cander, 2014]. Могут также использоваться для прогноза функционирования КВ-радиосредств в различных условиях медианные месячные модели ионосферы, созданные более 50 лет назад и постоянно улучша-ющиеся .…”

Section: загоризонтная радиолокация как метод контроля эффектов космиunclassified

Space weather impact on radio device operation

Berngardt¹

2017

Solnechno-Zemnaya Fizika

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Аннотация. В работе проведен обзор влияния факторов космической погоды на работу радио-средств. Обзор основан на работах, монографиях и стратегических научных планах исследования кос-мической погоды последних лет. Основное внима-ние уделено влиянию ионосферных процессов, обу-словленных космической погодой, на распростра-нение радиоволн, в основном коротких. Приведены некоторые примеры такого влияния на основе дан-ных радара EKB ИСЗФ СО РАН на 2012-2016 гг.: ослабление сигналов возвратно-наклонного зонди-рования во время солнечных вспышек, эффекты пе-ремещающихся ионосферных возмущений различных масштабов в сигналах возвратно-наклонного зондиро-вания, эффекты магнитосферных волн в сигналах ионосферного рассеяния.Ключевые слова: космическая погода, аппара-турные эффекты.Abstract. This paper reviews the space weather impact on operation of radio devices. The review is based on recently published papers, books, and strategic scientific plans of space weather investigations. The main attention is paid to ionospheric effects on propagation of radiowaves, basically short ones. Some examples of such effects are given based on 2012-2016 ISTP SB RAS EKB radar data: attenuation of ground backscatter signals during solar flares, effects of travelling ionospheric disturbances of different scales in ground backscatter signals, effects of magnetospheric waves in ionospheric scatter signals.

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Ionospheric Prediction and Forecasting

Cited by 121 publications

References 0 publications

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Radio communication via Near Vertical Incidence Skywave propagation: an overview

Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity

Space weather impact on radio device operation

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