Abstract

Four primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar-cap plasma patches. These are the Gradient Drift, Current Convective and Kelvin-Helmholtz instabilities and a small-scale “Turbulence” process. In this paper the range of possible values of the linear growth-rates for each of these processes is explored using Dynamics Explorer 2 satellite observations. It is found that the inertial Turbulence instability is the dominant process, followed by inertial Gradient Drift, collisional Turbulence and collisional shortwave Current Convective instabilities. The other processes, such as Kelvin-Helmhotz, collisional Gradient Drift and inertial shortwave Current Convective instabilities very rarely (<1% of the time) give rise to a growth rate exceeding 1/60, that is deemed to be significant (in publications) to give rise to GPS scintillation.
Original languageEnglish
Pages (from-to)3439-3451
JournalJournal of Geophysical Research: Space Physics
Volume121
Issue number4
DOIs
Publication statusPublished - Apr 2016

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polar caps
turbulence
gradients
scintillation
Dynamics Explorer 2 satellite
Kelvin-Helmholtz instability
magnetohydrodynamic stability
satellite observation

Cite this

@article{a5cf73a59223424da92980c73efa5397,
title = "Polar-cap plasma patch primary linear instability growth-rates compared",
abstract = "Four primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar-cap plasma patches. These are the Gradient Drift, Current Convective and Kelvin-Helmholtz instabilities and a small-scale “Turbulence” process. In this paper the range of possible values of the linear growth-rates for each of these processes is explored using Dynamics Explorer 2 satellite observations. It is found that the inertial Turbulence instability is the dominant process, followed by inertial Gradient Drift, collisional Turbulence and collisional shortwave Current Convective instabilities. The other processes, such as Kelvin-Helmhotz, collisional Gradient Drift and inertial shortwave Current Convective instabilities very rarely (<1{\%} of the time) give rise to a growth rate exceeding 1/60, that is deemed to be significant (in publications) to give rise to GPS scintillation.",
author = "Robert Burston and Cathryn Mitchell and Ivan Astin",
year = "2016",
month = "4",
doi = "10.1002/2015JA021895",
language = "English",
volume = "121",
pages = "3439--3451",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9380",
number = "4",

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TY - JOUR

T1 - Polar-cap plasma patch primary linear instability growth-rates compared

AU - Burston, Robert

AU - Mitchell, Cathryn

AU - Astin, Ivan

PY - 2016/4

Y1 - 2016/4

N2 - Four primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar-cap plasma patches. These are the Gradient Drift, Current Convective and Kelvin-Helmholtz instabilities and a small-scale “Turbulence” process. In this paper the range of possible values of the linear growth-rates for each of these processes is explored using Dynamics Explorer 2 satellite observations. It is found that the inertial Turbulence instability is the dominant process, followed by inertial Gradient Drift, collisional Turbulence and collisional shortwave Current Convective instabilities. The other processes, such as Kelvin-Helmhotz, collisional Gradient Drift and inertial shortwave Current Convective instabilities very rarely (<1% of the time) give rise to a growth rate exceeding 1/60, that is deemed to be significant (in publications) to give rise to GPS scintillation.

AB - Four primary plasma instability processes have been proposed in the literature to explain the generation of phase scintillation associated with polar-cap plasma patches. These are the Gradient Drift, Current Convective and Kelvin-Helmholtz instabilities and a small-scale “Turbulence” process. In this paper the range of possible values of the linear growth-rates for each of these processes is explored using Dynamics Explorer 2 satellite observations. It is found that the inertial Turbulence instability is the dominant process, followed by inertial Gradient Drift, collisional Turbulence and collisional shortwave Current Convective instabilities. The other processes, such as Kelvin-Helmhotz, collisional Gradient Drift and inertial shortwave Current Convective instabilities very rarely (<1% of the time) give rise to a growth rate exceeding 1/60, that is deemed to be significant (in publications) to give rise to GPS scintillation.

UR - http://dx.doi.org/10.1002/2015JA021895

UR - http://dx.doi.org/10.1002/2015JA021895

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JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9380

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