Results 181 to 190 of about 2,907 (207)

The Plasmapause Formation

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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Plasmapause diffusion

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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Narrow-band plasmapause hiss

Advances in Space Research, 1996
Abstract Narrow-band plasmapause hiss around 5 kHz was often observed in the vicinity of the plasmapause invariant latitude by ISIS-1 and ISIS-2. Frequency-time spectra of the hiss are similar to those of ground narrow-band 5 kHz hiss observed at mid- and low-latitudes. Statistically, the occurrence rate of the narrow-band plasmapause hiss is maximum
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Micropulsations and the plasmapause

Journal of Atmospheric and Terrestrial Physics, 1976
Abstract 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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Interchange instability of the Earth's plasmapause

Journal of Geophysical Research: Space Physics, 1990
We reexamine the stability of low‐frequency electrostatic waves with k·B = 0 at the plasmapause, using an extension of the procedure of Richmond (1973), an approach that is based on computing individual particle motions and includes the line‐tying effect of the ionosphere.
T. S. Huang, R. A. Wolf, T. W. Hill
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Shocks, solitons and the plasmapause

Journal of Atmospheric and Terrestrial Physics, 1976
Abstract According to existing magnetospheric models, the plasmapause is thought to be the intersection of the solar wind induced convective flow with the Earth's corotational flow ( Axford , 1969). This fluid model is intuitive and acceptable, at least for the first sight.
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Dayside pulsation events near the plasmapause

Planetary and Space Science, 1986
Magnetic field observations of four dayside pulsation events detected near the equatorial plasmapause region on August 23, 24, September 30, and October 10, 1982 are examined. The wave characteristics and the magnetic components of the pulsation events obtained from DE-1 satellite data and ground data from Siple, Antarctica are described and compared ...
N.G. Lin, L.J. Cahill, M.J. Engebretson, M. Sugiura, R.L. Arnoldy   +4 more
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Ducted whistler propagation outside the plasmapause

Journal of Geophysical Research: Space Physics, 1988
A study has been made of the conditions under which lightning whistlers are observed after propagating along geomagnetic field aligned paths or “ducts” located outside the plasmapause. The study was based in part upon results previously obtained from Antarctic whistler recordings in 1963 and in part upon new data from 45 days of observations at Siple ...
D. L. Carpenter, D. M. Šulić
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Ples model in the plasmapause diagnostics

Advances in Space Research, 2002
Abstract Code PLES instantaneous mapping of ionospheric characteristics though intended for operational use in telecommunication systems appears to be a useful tool in plasmapause diagnostics. PLES allows construction of retrospective maps for specific epochs.
I. Stanislawska, H. Rothkaehl
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Excitation of the Plasmapause at Ultralow Frequencies

Physical Review Letters, 1973
Observational evidence and the theoretical interpretation indicate that magnetic disturbances exterior to the plasmasphere boundary (within the magnetosphere) can excite damped, sinusoidal oscillations, which can be inferred as a magnetohydrodynamic surface eigenmode, at the o infer the plasma density inside the plasmapause and the plasma density ...
L. J. Lanzerotti, H. Fukunishi, A. Hasegawa, Liu Chen   +3 more
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