Results 181 to 190 of about 5,638 (223)

Convective instabilities in the plasmasphere

Journal of Atmospheric and Solar-Terrestrial Physics, 2006
Abstract According to observations, the averaged slope of the equatorial plasma density distribution is nearly constant ( d ln n / d L = - 0.724 ) during very quiet geomagnetic activity from L = 2 to L > 7 , and even smaller ( d ln n / d L = - 1.5 ) during more typical quiet activity.
N. André, J.F. Lemaire
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Analysis of the ionosphere‐plasmasphere transport of superthermal electrons, 1. Transport in the plasmasphere

Journal of Geophysical Research: Space Physics, 1992
Analytic solutions to the kinetic equation which describes the transport of superthermal electrons in the plasmasphere are presented. Relations which allow the calculation of the photoelectron energy spectra and the plasmaspheric transparency are obtained.
George V. Khazanov, Tamas I. Gombosi, Andrew F. Nagy, Michael A. Koen   +3 more
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The Earth’s Plasmasphere

2009
Preface.- Foreword.- CLUSTER and IMAGE: New Ways to Study the Earth's Plasmasphere.- Plasmaspheric Density Structures and Dynamics: Properties Observed by the CLUSTER and IMAGE Missions.- Electric Fields and Magnetic Fields in the Plasmasphere: A Perspective from CLUSTER and IMAGE.- Advances in Plasmaspheric Wave Research with CLUSTER and IMAGE ...
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Thermal structure of the plasmasphere

Advances in Space Research, 1996
Abstract The density structure of the plasmasphere has been a subject of interest and considerable research since the discovery of the plasmapause. For a number of reasons, plasmasphere thermal structure has been examined less thoroughly. Observations show that the thermal structure is closely tied to density structure and has significant impact on ...
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Plasma transport in the plasmasphere

Advances in Space Research, 1986
Abstract The plasmasphere is filled with very low energy plasma upwelling from the topside ionosphere. The field-aligned distribution of this thermal ionospheric plasma is controlled by the gravitational and centrifugal potential distribution. There are two extreme types of hydrostatic plasma distribution in this field-aligned potential : the ...
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The Origin of Plasmaspheric Hiss

Science, 2009
Observations by the THEMIS spacecraft are providing a better picture of the electromagnetic environment surrounding Earth.
Ondřej Santolík, Jaroslav Chum
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Exospheric model of the plasmasphere

Journal of Atmospheric and Solar-Terrestrial Physics, 2001
Abstract ISEE observations indicate that after prolonged quiet periods, the saturated equatorial density decreases exponentially with the radial distance in the plasmasphere. No hydrostatic barometric models fit the saturated equatorial density profiles, since those obtained with barometric maxwellian or lorentzian kinetic models decrease more slowly
V. Pierrard, J. Lemaire
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Topside ionosphere and plasmasphere: Use of NeQuick in connection with Gallagher plasmasphere model

Advances in Space Research, 2007
Abstract The NeQuick ionospheric electron density model has a very simple topside formulation, which allows taking into account the electron content up to 20,000 km. In the present work, the Gallagher model has been used in connection with NeQuick to provide a more realistic representation of the electron concentration distribution in the ...
M. Cueto, P. Coïsson, S.M. Radicella, M. Herraiz, L. Ciraolo, C. Brunini   +5 more
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Model of the expanding plasmasphere

Geomagnetism and Aeronomy, 2009
The self-consistent axisymmetric mode of stationary plasma configurations around the magnetized planet has been considered taking into account the ionized gas outflow from a certain magnetic surface L = L* (L* ≈ 6.6 for the terrestrial conditions). The L value is found from the analytical solution of the initial conditions.
A. O. Soldatkin, Yu. V. Chugunov
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The formation plasmaspheric tails

Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science, 2000
Abstract The observations of ripples in the plasmapause surface, of attached plasmatails and detached cold plasma elements are recalled. The mechanisms proposed for the formation of plasmatails and of detached plasma elements are also recalled. In this contribution we describe an alternative mechanism which fits currently available observations. This
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