Results 161 to 170 of about 1,626 (204)

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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Evidence of MLT propagation of the plasmapause inferred from THEMIS data

Journal of Atmospheric and Solar-Terrestrial Physics, 2017
The cross-correlation analysis is applied to the comprehensive database of THEMIS plasmapause crossings (6840 LPP s) and both solar wind parameters and geo- magnetic indices (thereafter LPP indicators). We estimate MLTs of the plasma- pause formation and
Viviane Pierrard, Giuliana Verbanac, Mario Bandic   +2 more
exaly   +2 more sources

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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Observations of the plasmapause and diffuse aurora

Planetary and Space Science, 1976
Abstract 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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Plasmapause signatures in the ionosphere and magnetosphere

Journal of Geophysical Research: Space Physics, 1978
Isis 2 observations of a variety of topside ionospheric ‘signatures’ of the plasmapause are compared with simultaneously acquired equatorial electron density profiles obtained by the whistler technique. The satellite data were acquired at ∼1400‐km altitude at dusk and dawn in the sunlit northern hemisphere summer ionosphere within ∼15° longitude of the
J. C. Foster, C. G. Park, L. H. Brace, J. R. Burrows, J. H. Hoffman, E. J. Maier, J. H. Whitteker   +6 more
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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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Monitoring the plasmapause dynamics at LEO

2021
<p>In the past decades researchers have revealed links between a series of sub-auroral ionospheric phenomena and the plasmapause (PP) dynamics, such as the mid-latitude ionospheric trough (MIT) and the associated sub-auroral temperature enhancement (SETE), the light-ion trough (LIT), the sub-auroral ion drift (SAID) or the more intense ...
Balázs Heilig, Claudia Stolle, Jan Rauberg, Guram Kervalishvili   +3 more
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Evidence of drift waves at the plasmapause

Journal of Geophysical Research: Space Physics, 1978
As the Hawkeye 1 spacecraft crosses the plasmapause at high altitudes (R > 3 RE), a band of electric field noise is often detected in the frequency channels from 1.7 to 178 Hz. No corresponding magnetic field noise is detected, indicating that the noise is electrostatic (or at least quasi‐electrostatic), and the electric field is polarized ...
Paul M. Kintner, Donald A. Gurnett
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The plasmapause as a VLF wave guide

Journal of Geophysical Research, 1977
The properties of the plasmapause as a VLF wave guide are studied. The guidance that occurs is a form of gradient trapping of VLF wave energy. It is shown that guiding is possible at both the inner and outer edges of the plasmapause and that more efficient guiding occurs as the plasmapause gradients become stronger.
U. S. Inan, T. F. Bell
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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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