The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics
Data from the Advanced Ionospheric Sounder (AIS) deployed at Halley, Antarctica (76-deg S, 27-deg W; L = 4.2) and the Dynamics Explorer-2 spacecraft (DE-2) are used to investigate several aspects of the formation processes and dynamics of the poleward edge of the midlatitude electron density trough....
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ftnasantrs:oai:casi.ntrs.nasa.gov:19870035618 2023-05-15T14:01:08+02:00 The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics Rodger, A. S. Brace, L. H. Hoegy, W. R. Winningham, J. D. Unclassified, Unlimited, Publicly available Aug 1, 1986 http://ntrs.nasa.gov/search.jsp?R=19870035618 unknown http://ntrs.nasa.gov/search.jsp?R=19870035618 Accession ID: 87A22892 Copyright Other Sources 46 Journal of Atmospheric and Terrestrial Physics; 48; 715-728 1986 ftnasantrs 2012-02-15T17:09:28Z Data from the Advanced Ionospheric Sounder (AIS) deployed at Halley, Antarctica (76-deg S, 27-deg W; L = 4.2) and the Dynamics Explorer-2 spacecraft (DE-2) are used to investigate several aspects of the formation processes and dynamics of the poleward edge of the midlatitude electron density trough. These include a study of the flux and energy of charged particles precipitating into the F-region as a function of Magnetic Local Time. It is found that local energetic electron precipitation is a major source of ionization of the poleward edge in the evening sector, but only after magnetic midnight transport processes become more important. Occasionally a significant increase in the flux of conjugate photoelectrons is colocated with the poleward edge of the trough in the morning sector. The combination of AIS and DE-2 data has allowed identification of significant longitudinal structure on the poleward edge of the trough that may be the result of substorm activity. It is found that the orientation of the poleward edge of the trough and the locus of the plasmapause predicted from the 'tear-drop' model vary in rather a similar manner with local time, though no close physical link between the two features is inferred from this coincidence. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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46 |
spellingShingle |
46 Rodger, A. S. Brace, L. H. Hoegy, W. R. Winningham, J. D. The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
topic_facet |
46 |
description |
Data from the Advanced Ionospheric Sounder (AIS) deployed at Halley, Antarctica (76-deg S, 27-deg W; L = 4.2) and the Dynamics Explorer-2 spacecraft (DE-2) are used to investigate several aspects of the formation processes and dynamics of the poleward edge of the midlatitude electron density trough. These include a study of the flux and energy of charged particles precipitating into the F-region as a function of Magnetic Local Time. It is found that local energetic electron precipitation is a major source of ionization of the poleward edge in the evening sector, but only after magnetic midnight transport processes become more important. Occasionally a significant increase in the flux of conjugate photoelectrons is colocated with the poleward edge of the trough in the morning sector. The combination of AIS and DE-2 data has allowed identification of significant longitudinal structure on the poleward edge of the trough that may be the result of substorm activity. It is found that the orientation of the poleward edge of the trough and the locus of the plasmapause predicted from the 'tear-drop' model vary in rather a similar manner with local time, though no close physical link between the two features is inferred from this coincidence. |
format |
Other/Unknown Material |
author |
Rodger, A. S. Brace, L. H. Hoegy, W. R. Winningham, J. D. |
author_facet |
Rodger, A. S. Brace, L. H. Hoegy, W. R. Winningham, J. D. |
author_sort |
Rodger, A. S. |
title |
The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
title_short |
The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
title_full |
The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
title_fullStr |
The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
title_full_unstemmed |
The poleward edge of the mid-latitude trough - Its formation, orientation and dynamics |
title_sort |
poleward edge of the mid-latitude trough - its formation, orientation and dynamics |
publishDate |
1986 |
url |
http://ntrs.nasa.gov/search.jsp?R=19870035618 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19870035618 Accession ID: 87A22892 |
op_rights |
Copyright |
_version_ |
1766270731358830592 |