Results 81 to 90 of about 221 (134)
AtmosphereIt is well understood that near midnight, the Harang Discontinuity separates the auroral duskside eastward electrojet (EEJ) and dawnside westward electrojet (WEJ) and associated plasma flows driven by enhanced magnetospheric convections via Magnetosphere–
Ildiko Horvath, Brian C. Lovell
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Proposal for an ionosphere/plasmasphere monitoring system
Annales GeophysicaeA space-based satellite system suited for long-term monitoring of the Earth's ionosphere/plasmasphere systems is proposed. The monitoring system consists of a network of radio beacon satellites capable of measuring the ionospheric and plasmaspheric ...
N. Jakowski, H.-D. Bettac
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Evolution of the plasmapause position
Journal of Atmospheric and Solar-Terrestrial Physics, 2001Abstract The Polar spacecraft, launched in February 1996, has crossed the plasmapause more than 6000 times so that a large number of plasmapause measurements are available at all local time sectors, at low (∼1RE) and high (∼2–4RE) altitudes, and during various magnetic conditions.
Harri Laakso, Mikko Jarva
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Journal of Geophysical Research: Space Physics, 2020
AbstractRecent studies based on CLUSTER, CRRES, and especially on THEMIS satellite data have revealed the statistical behavior of the global plasmapause such as eastward azimuthal plasmapause propagation and radial plasmapause motion between 21 and 07 magnetic local times (MLTs) most likely at postmidnight.
Viviane Pierrard +2 more
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AbstractRecent studies based on CLUSTER, CRRES, and especially on THEMIS satellite data have revealed the statistical behavior of the global plasmapause such as eastward azimuthal plasmapause propagation and radial plasmapause motion between 21 and 07 magnetic local times (MLTs) most likely at postmidnight.
Viviane Pierrard +2 more
exaly +3 more sources
Nature, 1977
Saturation of the dc double probe instrument on Explorer 45 was used to identify the plasmapause. A data base was developed to statistically study the average position of the plasmapause over 14.5 hours of magnetic local time under differing magnetic conditions.
Nelson C. Maynard, Joseph M. Grebowsky
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Saturation of the dc double probe instrument on Explorer 45 was used to identify the plasmapause. A data base was developed to statistically study the average position of the plasmapause over 14.5 hours of magnetic local time under differing magnetic conditions.
Nelson C. Maynard, Joseph M. Grebowsky
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Physica Scripta, 1987
Convection velocities in the equatorial region of the magnetosphere have a large dawn-dusk asymmetry as well as a significant day-night asymmetry. The latter is the consequence of (i) day-night asymmetry of the ionospheric integrated conductivities and (ii) enhanced solar wind induced convection velocity in the midnight local time sector.
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Convection velocities in the equatorial region of the magnetosphere have a large dawn-dusk asymmetry as well as a significant day-night asymmetry. The latter is the consequence of (i) day-night asymmetry of the ionospheric integrated conductivities and (ii) enhanced solar wind induced convection velocity in the midnight local time sector.
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Journal of Geophysical Research: Space Physics, 1983
The possible smoothing effect that diffusion has on steep plasmapause density gradients is examined for diffusion estimated from (a) the Bohm diffusion coefficient and (b) scattering by observed electrostatic waves. For characteristic plasma temperatures and magnetic fields at an L = 4 plasmapause, the (equatorial) perpendicular Bohm diffusion ...
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The possible smoothing effect that diffusion has on steep plasmapause density gradients is examined for diffusion estimated from (a) the Bohm diffusion coefficient and (b) scattering by observed electrostatic waves. For characteristic plasma temperatures and magnetic fields at an L = 4 plasmapause, the (equatorial) perpendicular Bohm diffusion ...
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Micropulsations and the plasmapause
Journal of Atmospheric and Terrestrial Physics, 1976Abstract Based upon observations from a series of OGO satellites and ground measurements, the properties and structure of plasmapause-associated irregularities and the ring current are summarized in the following terms in relation to geomagnetic pulsations: 1. (1) spatial structure and maintenance; 2.
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Observations of the plasmapause and diffuse aurora
Planetary and Space Science, 1976Abstract Simultaneous auroral and whistler data from SANAE, Antarctica, show that the separation between the equatorward boundary of the diffuse aurora and the plasmapause lies between zero and 0.25 L . There is also some evidence to suggest that auroral precipitation occurs, at least partly, on closed field lines.
G.R. Linscott, M.W.J. Scourfield
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