Results 191 to 200 of about 1,155 (215)

Theoretical comments on the nature of the plasmapause

Advances in Space Research, 1986
The traditional theoretical interpretations of the observed plasmapause are compared, namely, the plasmapause as: (1) The boundary between closed flux tubes that have been in the inner magnetosphere for several days and those that have recently drifted in from the magnetotail or (2) the last closed electric equipotential.
R.A. Wolf, G.A. Mantjoukis, R.W. Spiro
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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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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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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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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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Ballooning mode instability at the plasmapause

Journal of Geophysical Research: Space Physics, 1990
The ballooning mode instability, which can excite hydromagnetic waves at the plasmapause, is studied in the presence of azimuthal plasma flows induced during geomagnetically disturbed periods. A general sufficient criterion for the ballooning mode stability is derived as δW ≥ 0 (where δW represents the change in the potential energy) which involves the
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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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Observations of the plasmapause from OGO 5

Journal of Geophysical Research, 1970
Plasmapause observations by ion spectrometer aboard OGO-5 vehicle for early orbits, obtaining O, He and H ion concentration profiles for geomagnetic ...
K. K. Harris, G. W. Sharp, C. R. Chappell   +2 more
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JIKIKEN electron beam measurements of the plasmapause

Advances in Space Research, 1986
Abstract An electron beam (200-eV, 0.25 – 1-mA) emitted fromJapanese magnetosphere exploring satellite JIKIKEN (EXOS-B) has excited a number of plasma waves. Among them, fUHF (upper hybrid frequency) and fp (plasma wave) are most strongly excited and from them, the plasma density and the magnetic field strength can be known.
N. Kawashima, K. Akai
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Erosion and Recovery of the Plasmasphere in the Plasmapause Region

Space Science Reviews, 1997
Understanding the basic plasmasphere erosion/recovery cycle remains a major, as yet largely unmet, challenge to the space science community. We do not yet have a description of the formation of a new plasmapause boundary, nor have we been able to map the evidently complex electric fields that develop at subauroral latitudes during the process of ...
D. L. Carpenter, J. Lemaire
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