Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology
Polar 3 was launched in northern Norway on January 27, 1974. Traversing nearly 3 deg latitude, the rocket crossed over a stable IBC II auroral arc in the positive bay region and continued north to a convection boundary which was identified as the Harang discontinuity. Measurement of the complete ele...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19760018623 2023-05-15T17:43:26+02:00 Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology Maehlum, B. Egeland, A. Evans, D. S. Maynard, N. C. Unclassified, Unlimited, Publicly available May 1, 1976 application/pdf http://hdl.handle.net/2060/19760018623 unknown Document ID: 19760018623 Accession ID: 76N25711 http://hdl.handle.net/2060/19760018623 No Copyright CASI GEOPHYSICS NASA-TM-X-71130 X-625-76-108 1976 ftnasantrs 2019-07-21T11:05:23Z Polar 3 was launched in northern Norway on January 27, 1974. Traversing nearly 3 deg latitude, the rocket crossed over a stable IBC II auroral arc in the positive bay region and continued north to a convection boundary which was identified as the Harang discontinuity. Measurement of the complete electric field vector, of energetic electrons and of the auroral N+2 and OI emissions were used to study the convection topology in the pre-magnetic-midnight region. A strong anticorrelation was observed between the electric field and the precipitating energetic electrons. The inverted V nature of the electron precipitations at the convection boundary, compared with the lack of such structure over the arc which was within the positive bay region, leads to the conclusion that auroral arcs are likely to be associated with inverted V type precipitation only at or poleward of convection boundaries and their eddy structures. Other/Unknown Material Northern Norway NASA Technical Reports Server (NTRS) Norway |
institution |
Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
GEOPHYSICS |
spellingShingle |
GEOPHYSICS Maehlum, B. Egeland, A. Evans, D. S. Maynard, N. C. Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
topic_facet |
GEOPHYSICS |
description |
Polar 3 was launched in northern Norway on January 27, 1974. Traversing nearly 3 deg latitude, the rocket crossed over a stable IBC II auroral arc in the positive bay region and continued north to a convection boundary which was identified as the Harang discontinuity. Measurement of the complete electric field vector, of energetic electrons and of the auroral N+2 and OI emissions were used to study the convection topology in the pre-magnetic-midnight region. A strong anticorrelation was observed between the electric field and the precipitating energetic electrons. The inverted V nature of the electron precipitations at the convection boundary, compared with the lack of such structure over the arc which was within the positive bay region, leads to the conclusion that auroral arcs are likely to be associated with inverted V type precipitation only at or poleward of convection boundaries and their eddy structures. |
format |
Other/Unknown Material |
author |
Maehlum, B. Egeland, A. Evans, D. S. Maynard, N. C. |
author_facet |
Maehlum, B. Egeland, A. Evans, D. S. Maynard, N. C. |
author_sort |
Maehlum, B. |
title |
Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
title_short |
Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
title_full |
Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
title_fullStr |
Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
title_full_unstemmed |
Auroral vector electric field and particle comparisons. 1: Pre-midnight convection topology |
title_sort |
auroral vector electric field and particle comparisons. 1: pre-midnight convection topology |
publishDate |
1976 |
url |
http://hdl.handle.net/2060/19760018623 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
CASI |
op_relation |
Document ID: 19760018623 Accession ID: 76N25711 http://hdl.handle.net/2060/19760018623 |
op_rights |
No Copyright |
_version_ |
1766145503292030976 |