Results 161 to 170 of about 41,349 (201)

Positive ions in the topside ionosphere

Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1968
Abstract The satellite Ariel I, launched in April 1962, provided a survey of the topside ionosphere over a latitude range of ± 55°. The measurements made by the ion energy spectrometer showed the ions O+ and He+ to be the major massive components of the ionosphere and enabled a global study of the composition over the northern summer ...
Robert Lewis Fullarton Boyd, Susan Laflin   +1 more
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Validation of the IRI-2020 topside ionosphere options through in-situ electron density observations by low-Earth-orbit satellites [PDF]

Advances in Space Research
The topside ionosphere extends from the F2-layer peak, where the electron density reaches its absolute maximum in the ionosphere, to the overlying plasmasphere and magnetosphere.
Michael Pezzopane, Dieter Bilitza, Alessio Pignalberi   +2 more
exaly   +2 more sources

Thermal diffusion in the topside ionosphere

Planetary and Space Science, 1967
Abstract It is shown that thermal diffusion profoundly affects ion density gradients in the topside of the ionosphere. For charged particle temperatures increasing with altitude the effect is to decrease the He+ and H+ density gradients at altitudes where O+ is the major ion and to increase (algebraically) the He+ and O+ density gradients at ...
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Transversely accelerated ions in the topside ionosphere

Journal of Geophysical Research: Space Physics, 1994
Data from the rocket campaigns MARIE and TOPAZ III, within regions of low‐altitude transversely accelerated ions, are interpreted to explain the acceleration of the ions. Using the Monte Carlo kinetic technique to evaluate the ion heating produced by the simultaneously observed lower hybrid waves, we find that their observed electric field amplitudes ...
John M. Retterer, Tom Chang, J. R. Jasperse   +2 more
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A regular disturbance in the topside ionosphere

Journal of Geophysical Research, 1969
Continuous records of the electron content of the ionosphere, obtained over a period of several years, have shown that a large disturbance occurs between 10 P.M. and 1 A.M. on about half the nights in summer. After an initial small decrease, the electron content increases rapidly by about 30% and occasionally up to 80%. The increase lasts for 15 to 100
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Equatorial hiss in the topside ionosphere

Journal of Geophysical Research: Space Physics, 1979
Equatorial hiss seen in the topside ionosphere by the Dartmouth experiment on Ogo 6, using an electric dipole antenna, is described. The observations are consistent with wave normal positions intermediate between the geomagnetic field and the resonance cone.
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On a possible seismomagnetic effect in the topside ionosphere

Advances in Space Research, 2015
Abstract In this paper we present the results of the computation of the electric and magnetic fields produced in the ionosphere by the near-earth seismogenic disturbance in the vertical atmospheric electrostatic field under different ionospheric conditions.
V.V. Hegai, V.P. Kim, J.Y. Liu
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Anisotropy of electron temperature in the topside ionosphere

Advances in Space Research, 1988
Abstract Anisotropy of electron temperature was detected by means of three planar probes which were installed on the polar orbiting satellite ‘OHZORA’. Generally, the electron temperature parallel to the geomagnetic line of force, T∥, is higher than the electron temperature which is perpendicular to the geomagnetic line of force, T⊥.
K.-I. Oyama, T. Abe, S. Watanabe
openaire   +1 more source

Ionospheric topside sounding.

Science (New York, N.Y.), 2010
Over the past few years, the satellite topside sounders have significantly contributed to the understanding of the upper ionosphere. A great quantity of radio echo data has been accumulated, from which the ionospheric electrondensity distribution can be determined. The topside measurements of electron density essentially agree with similar measurements
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Disturbances of the topside ionosphere caused by typhoons

Geomagnetism and Aeronomy, 2010
The measurements on board the Cosmos-1809 satellite of various parameters of the topside ionosphere plasma during more than ten typhoons in various regions are analyzed. It is shown that specific zones of increased pressure of the electron gas, electric field, and intense ion oscillations are formed during the intensification stage.
N. V. Isaev, V. M. Kostin, G. G. Belyaev, O. Ya. Ovcharenko, E. P. Trushkina   +4 more
openaire   +1 more source