Results 251 to 260 of about 86,460 (309)

Ionospheric response to winter stratosphere/lower mesosphere jet stream in the Northern Hemisphere as derived from vertical radio sounding data

Journal of Atmospheric and Solar-Terrestrial Physics, 2018
Abstract We study the effects of the middle atmosphere dynamics on the mid-latitude and subauroral ionosphere during the winter jet stream that occurred at the stratosphere/lower mesosphere heights in the Northern Hemisphere over 2008–2013. The used ionospheric data were obtained from measurements taken at the vertical sounding ionosonde chain ...
M.A. Chernigovskaya, B.G. Shpynev, K.G. Ratovsky, A.Yu. Belinskaya, A.E. Stepanov, V.V. Bychkov, S.A. Grigorieva, V.A. Panchenko, N.A. Korenkova, J. Mielich   +9 more
semanticscholar   +3 more sources

On the possibility of quasi-vertical radio sounding of the ionosphere in the extremely low frequency band

JETP Letters, 2007
The experimental measurements show that the state of the ionosphere pronouncedly affects the field of the extremely low frequency (ELF) band in the transition zone. The measurements were performed on the Kola Peninsula at different times of day and in different seasons of 2006. The observed seasonal variations in the results are larger than the diurnal
E. D. Tereshchenko, V. F. Grigor’ev, A. E. Sidorenko, A. N. Milichenko, A. V. Mol’kov, L. A. Sobchakov, A. V. Vasil’ev   +6 more
semanticscholar   +3 more sources

Errors in Estimating of the F2-Layer Peak Parameters in Automatic Systems for Processing the Ionograms in the Vertical Radio Sounding of the Ionosphere under Low Solar Activity Conditions

Geomagnetism and Aeronomy, 2021
The article analyzes the errors in estimating the parameters of the main ionospheric maximum, plasma frequency foF2 and its height hmF2, by automated systems for processing the vertical radio sounding data of the ionosphere at the IZMIRAN station in 2018, during a period of low solar activity.
I. V. Krasheninnikov, L. N. Leshchenko
semanticscholar   +3 more sources

Determining Higher-Order Cumulants of Sea-Surface Slopes by Quasi-Vertical Radio Sounding Data

Moscow University Physics Bulletin, 2019
This paper analyzes the possibilities and constraints in determining the skewness and kurtosis of slopes by radio sounding data at angles at which the backscattered signal is determined by quasi-specular reflection. It is shown that direct recovery of skewness and kurtosis based on the dependence of the normalized backscattering cross section on the ...
K. V. Pokazeev, A. S. Zapevalov
semanticscholar   +3 more sources

Meteorological effects of ionospheric disturbances from vertical radio sounding data

Journal of Atmospheric and Solar-Terrestrial Physics, 2015
Abstract We studied ionospheric disturbances caused by the wave-like processes in the middle atmosphere. The ionospheric data were obtained from continuous measurements with the DPS-4 vertical sounding ionosondes in Irkutsk and Norilsk over 2008–2010.
M.A. Chernigovskaya, B.G. Shpynev, K.G. Ratovsky   +2 more
semanticscholar   +3 more sources

Validation of GPS Ionospheric Radio Occultation results onboard CHAMP by Vertical Sounding Observations in Europe

, 2005
Ionospheric radio occultation (IRO) measurements have a big potential for monitoring the ionospheric behavior on global scale for now- and forecasting the ionospheric impact on radio systems. In this article we validate the retrieved vertical electron density profiles (EDPs) derived from IRO measurements onboard CHAMP by using vertical sounding ...
Norbert Jakowski, Anna Belehaki, David Altadill   +2 more
exaly   +3 more sources

Modeling an experiment on radio sounding of the ionosphere from the artificial earth satellite Kosmos 1809 in the presence of vertical electron concentration inhomogeneities in the Arctic region

Geomagnetism and Aeronomy, 2012
We explain a hypothesis on the origin and propose a model of the specific formation of the electron density in the polar ionosphere in the form of relatively thin vertical and inclined layers and sheets. Modeling has confirmed that the main features noted in the experiment are successfully depicted in the proposed model, namely, the significant group ...
N. P. Danilkin, S. V. Zhuravlev, N. G. Kotonaeva, M. M. Anishin, M. A. Kuraev   +4 more
semanticscholar   +3 more sources

The effects of powerful oblique radio transmission on the ionosphere on vertical sounding data

Journal of Atmospheric and Solar-Terrestrial Physics, 1997
Abstract Results of experiments measuring the effects of a powerful oblique HF radio transmission on the ionosphere are described. In one experiment carried out in 1991 on a longitudinal path in the south-west part of the U.S.A., additional traces were found on vertical sounding (VS) ionograms generated by an ionosonde located near the mid-point of ...
G.S. Bochkarev, I.V. Krasheninnikov, G.S. Sales   +2 more
exaly   +3 more sources

A comparison of the thermospheric wind dynamics using transionospheric and vertical incidence radio sounding data

Advances in Space Research, 1996
Abstract In Nov 1990 in Irkutsk (52°N, 102°E), within the Super WAGS Program, measurements were made of parameters of motion of travelling ionospheric disturbances (TID's) at ionospheric heights using two measuring techniques for the Doppler shift of frequency and angles of arrival at vertical-incidence radio sounding at 2.6–6.4MHz and reception of ...
E.L. Afraimovich, B.O. Vugmeister, A.D. Kalikhman   +2 more
semanticscholar   +3 more sources

<title>One way to universalization of vertical radio sounding data obtained by different ionospheric stations</title>

SPIE Proceedings, 2007
Anton G. Kim
semanticscholar   +3 more sources