Results 251 to 260 of about 35,359 (303)
Determination of sporadic E radio wave propagation parameters based on vertical and oblique sounding
Advances in Space Research, 2015 © 2015 COSPAR. Published by Elsevier Ltd. All rights reserved. Sporadic E layer is often determined for HF radio communication. We have to deal with oblique radiowave propagation in the radio practice. The limiting frequencies at oblique propagation depend heavily on the transmitter power and the receiver sensitivity.
Sherstyukov O. +2 more
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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
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Radio Science, 1992 A simple expression for the expected average signal power of a radio acoustic sounding system (RASS) comprising a monostatic pulsed Doppler radar and a continuous‐wave broadbeam acoustic source is developed. The effects of horizontal winds, atmospheric turbulence, and vertical temperature gradients are included.
Richard J. Lataitis
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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 +2 more
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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 +6 more
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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 +4 more
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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
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2019 Radiation and Scattering of Electromagnetic Waves (RSEMW), 2019 the idea and the first results of experiments on the registration of the critical frequency of layer F2 in the Earth's ionosphere with an interval of one minute to determine the coefficient of minute unsteadiness of the ionosphere and its dependence on time are presented.
Nadezhda G. Kotonaeva +3 more
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Vertical Sounding of Ionospheric Radio Channels by Multicarrier Phase-Shift Keying Signals
2022 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2022 Vladimir Ivanov +2 more
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Science Bulletin of the Novosibirsk State Technical University, 2014 А. А. Васенина, Alena Vasenina
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