Results 191 to 200 of about 166,062,727 (217)

Dynamics of plasma density perturbations in the upper ionosphere and the magnetosphere under the action of powerful HF radio waves

Journal of Atmospheric and Solar-Terrestrial Physics, 2015
Abstract Dynamics of the density perturbations of the main plasma components (electrons, oxygen and hydrogen ions) in the upper ionosphere and the magnetosphere under the action of powerful HF radio waves is discussed theoretically and numerically. For finite heating pulse and different effective powers the variations of the density perturbations in ...
N. Borisov, N. Ryabova, Yu. Ruzhin
openaire   +1 more source

Stable and unstable plasma perturbations in the ionospheric F region, caused by spatial packet of atmospheric gravity waves

Physics and Chemistry of the Earth, Parts A/B/C, 2009
Abstract A new model is developed to describe the response of the unstable near-equatorial F region plasma to the spatial packet of atmospheric gravity waves (AGWs) of the lithospheric origin. Presence of both propagating and non-propagating (upward) modes in the spectrum of exited AGW packet is accounted for.
Yu.G. Rapoport, M. Hayakawa, O.E. Gotynyan, V.N. Ivchenko, A.K. Fedorenko, Yu.A. Selivanov   +5 more
openaire   +1 more source

Magnetospheric plasma thermal perturbations induced by resonant heating of the ionospheric F-region by high-power radio wave

Advances in Space Research, 1993
Abstract A computer simulation is carried out of strong electron temperature and density perturbations penetrated into the Earth's plasmasphere from the ionospheric F-region heated by intense radio wave. At night time the following effects are predicted: a rapid growth of the electron temperature in the F-region, excitation in the plasmasphere of a ...
V.V. Vas'kov, Ya.S. Dimant, N.A. Ryabova
openaire   +1 more source

Investigation of Plasma Phenomena in the Ionosphere Under Natural Conditions and Under Conditions Artificially Perturbed by HAARP

2005
Abstract : Under this contract, Northwest Research Associates (NWRA) is performing measurements of the ionosphere in order to investigate plasma phenomena in both the natural ionosphere and in the ionosphere perturbed by the High-frequency Active Auroral Research Program (HAARP) high-frequency heater.
A. L. Snyder, John Rasmussen, Andrew J. Mazzella Jr, Edward J. Fremouw, James A. Secan   +4 more
openaire   +1 more source

Electromagnetic and plasma perturbations induced by radio emission of the EISCAT high-frequency heating facility in the outer ionosphere of the earth

Radiophysics and Quantum Electronics, 2008
We present the results of measuring the characteristics of electromagnetic and plasma perturbations at the altitudes of the Earth’s outer ionosphere, which were obtained by the onboard equipment of the French microsatellite DEMETER when it passed through the magnetic flux tube based on a region modified by high-power HF radio emission of the EISCAT ...
Markov, G., Belov, A., Frolov, V., Rapoport, V., Parrot, Michel, Rauch, Jean-Louis, Rietveld, M.   +6 more
openaire   +2 more sources

Study of Generation, Propagation and Relaxation Processes of Artificial Plasma Perturbations in the Earths Ionosphere using Short Powerful Radio Pulses

2019 Russian Open Conference on Radio Wave Propagation (RWP), 2019
The possibilities of using heating facilities as HF radars by including in the time schedule of their radiation short powerful radio pulses are demonstrated. These pulses are used for the amplitude-phase sounding of the disturbed volume of the ionosphere and the generation of diagnostic stimulated electromagnetic emission, which allows for a ...
Evgeny Sergeev, Savely Grach, Alexey Shindin   +2 more
openaire   +1 more source

Variations in the ionospheric wave perturbation spectrum during periodic heating of the plasma by high-power high-frequency radio waves

Radiophysics and Quantum Electronics, 2011
We present the results of spectral analysis of temporal variations in the Doppler frequency shift of the ionosphere-reflected signals from a high-frequency vertical ionospheric sounding radar located near the city of Kharkov in the days of exposure of the ionospheric plasma to the high-power radio emission of the Sura facility (Nizhny Novgorod) and in ...
L. F. Chernogor, V. L. Frolov, G.P. Komrakov, V. F. Pushin   +3 more
openaire   +1 more source

Satellite measurements of plasma-density perturbations induced in the topside ionosphere by high-power HF radio waves from the “Sura” heating facility

Radiophysics and Quantum Electronics, 2008
We report on the French DEMETER and American DMSP satellite measurements of largescale field-aligned plasma-density perturbations (ducts) induced in the topside ionosphere by the ionospheric F 2-layer pumping by means of high-power HF radio waves from the “Sura” heating facility.
Frolov, V., Papoport, V., Komrakov, G., Belov, A., Markov, G., Parrot, Michel, Rauch, Jean-Louis, Mishin, E.   +7 more
openaire   +1 more source

Probe Diagnostics and Identification of Sources of Ionospheric Magnetized Plasma Perturbations

Instruments and Experimental Techniques, 2022
V. A. Shuvalov, N. I. Pis’mennyi, G. S. Kochubei, D. N. Lazuchenkov   +3 more
openaire   +1 more source

Evolution of ion distribution functions in ionospheric plasmas perturbed by Alfvén waves

It is well known that electromagnetic (EM) processes can affect the trapped population of ionized particles in the Earth’s radiation belts and induce particle precipitations that can be measured by satellites. Moreover, in the last decades, several studies have suggested the concurrent occurrence of energetic particle flux variations (the so ...
Dario Recchiuti, Lorenzo Matteini, Luca Franci, Emanuele Papini, Giulia D'Angelo, Piero Diego, Pietro Ubertini, Roberto Battiston, Mirko Piersanti   +8 more
openaire   +1 more source