A corrector for spacecraft calculated electron moments

A corrector for spacecraft calculated electron moments

We present the application of a numerical method to correct electron moments calculated on-board spacecraft from the effects of potential broadening and energy range truncation. Assuming a shape for the natural distribution of the ambient plasma and employing the scalar approximation, the on-boar...

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Main Authors: J. Geach, S. J. Schwartz, V. Génot, O. Moullard, A. Lahiff, A. N. Fazakerley
Format: Article
Language:English
Published: Copernicus Publications 2005-03-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/23/931/2005/angeo-23-931-2005.pdf
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spelling doaj-05de5dd574334e9a9eec0ec10eee10792020-11-24T23:57:53ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762005-03-012393194310.5194/angeo-23-931-2005A corrector for spacecraft calculated electron momentsJ. Geach0J. Geach1S. J. Schwartz2S. J. Schwartz3V. Génot4O. Moullard5A. Lahiff6A. N. Fazakerley7Space Plasma Group, Astronomy Unit, Queen Mary, University of London, Mile End Road, London E1 4NS, UKnow at: Department of Physics, University of Durham, Durham DH1 3HP, UKSpace Plasma Group, Astronomy Unit, Queen Mary, University of London, Mile End Road, London E1 4NS, UKnow at: Space and Atmospheric Physics, Blackett Laboratory, Imperial College London, London SW7 2AZ, UKCentre d’Etude Spatiale des Rayonnements, 9 Avenue du Colonel Roche, Boite Postale 4346 31028, Toulouse, FranceSpace Plasma Group, Astronomy Unit, Queen Mary, University of London, Mile End Road, London E1 4NS, UKMullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UKMullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UKWe present the application of a numerical method to correct electron moments calculated on-board spacecraft from the effects of potential broadening and energy range truncation. Assuming a shape for the natural distribution of the ambient plasma and employing the scalar approximation, the on-board moments can be represented as non-linear integral functions of the underlying distribution. We have implemented an algorithm which inverts this system successfully over a wide range of parameters for an assumed underlying drifting Maxwellian distribution. The outputs of the solver are the corrected electron plasma temperature <i>T<sub>e</sub></i>, density <i>N<sub>e</sub></i> and velocity vector <i><b>V</b><sub>e</sub></i>. We also make an estimation of the temperature anisotropy <i>A</i> of the distribution. We present corrected moment data from Cluster's PEACE experiment for a range of plasma environments and make comparisons with electron and ion data from other Cluster instruments, as well as the equivalent ground-based calculations using full 3-D distribution PEACE telemetry.https://www.ann-geophys.net/23/931/2005/angeo-23-931-2005.pdf
collection DOAJ
language English
format Article
sources DOAJ
author J. Geach
J. Geach
S. J. Schwartz
S. J. Schwartz
V. Génot
O. Moullard
A. Lahiff
A. N. Fazakerley
spellingShingle J. Geach
J. Geach
S. J. Schwartz
S. J. Schwartz
V. Génot
O. Moullard
A. Lahiff
A. N. Fazakerley
A corrector for spacecraft calculated electron moments
Annales Geophysicae
author_facet J. Geach
J. Geach
S. J. Schwartz
S. J. Schwartz
V. Génot
O. Moullard
A. Lahiff
A. N. Fazakerley
author_sort J. Geach
title A corrector for spacecraft calculated electron moments
title_short A corrector for spacecraft calculated electron moments
title_full A corrector for spacecraft calculated electron moments
title_fullStr A corrector for spacecraft calculated electron moments
title_full_unstemmed A corrector for spacecraft calculated electron moments
title_sort corrector for spacecraft calculated electron moments
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2005-03-01
description We present the application of a numerical method to correct electron moments calculated on-board spacecraft from the effects of potential broadening and energy range truncation. Assuming a shape for the natural distribution of the ambient plasma and employing the scalar approximation, the on-board moments can be represented as non-linear integral functions of the underlying distribution. We have implemented an algorithm which inverts this system successfully over a wide range of parameters for an assumed underlying drifting Maxwellian distribution. The outputs of the solver are the corrected electron plasma temperature <i>T<sub>e</sub></i>, density <i>N<sub>e</sub></i> and velocity vector <i><b>V</b><sub>e</sub></i>. We also make an estimation of the temperature anisotropy <i>A</i> of the distribution. We present corrected moment data from Cluster's PEACE experiment for a range of plasma environments and make comparisons with electron and ion data from other Cluster instruments, as well as the equivalent ground-based calculations using full 3-D distribution PEACE telemetry.
url https://www.ann-geophys.net/23/931/2005/angeo-23-931-2005.pdf
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