ARCTIC Measuring the Thicknesses of Auroral Curtains
ABSTRACT. Auroral arcs (curtains) are extremely thin. A calculation of the minimum-possible arc thickness is presented; this minimum thickness is found to be about 9.5 m. Four requirements for designing an optical system that can image the thinnest curtains are discussed: 1) angular resolution, 2) t...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.512.7349 2023-05-15T14:19:45+02:00 ARCTIC Measuring the Thicknesses of Auroral Curtains Joseph E. Borovsky David M. Suszcynsky Melvin I. Buchwald Harold V. Dehaven The Pennsylvania State University CiteSeerX Archives 1991 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.7349 http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.7349 http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf AURORAL ARCS text 1991 ftciteseerx 2016-01-08T09:43:45Z ABSTRACT. Auroral arcs (curtains) are extremely thin. A calculation of the minimum-possible arc thickness is presented; this minimum thickness is found to be about 9.5 m. Four requirements for designing an optical system that can image the thinnest curtains are discussed: 1) angular resolution, 2) temporal resolution, 3) light-gathering power, and 4) data-recording convenience. An optical system meeting these four requirements was constructed. With this system, an observing campaign in Fort Smith, Northwest Territories, has begun and images of the small-scale structure of auroral arcs are presented. Arc thicknesses of approximately 40 m were observed. These measurements of arc thicknesses may provide a critical test for the many theories about the origins of auroral arcs. Key words: aurora, geomagnetism, ionosphere, Northwest Territories, photography, polar RÉSUM~, L ~ S arcs auroraw (draperies) sont extremement minces. On présente un calcul de l’épaisseur minimale possible d’un arc, qui se révèle être de l’ordre de 9,5 m. On discute des quatre Cléments nkcessaires B la conception d’un système optique qui puisse imager les draperies les plus minces, soit: 1) la résolution angulaire, 2) la résolution temporelle, 3) la capacitk de captage de la lumière et 4) la facilité de collecte des données. On a construit un système optique qui répond B ces quatre critères et avec lequel on a commencé une campagne d’observation A Fort Smith dans les Territoires du Nord-Ouest. On présente des images de la structure A petite échelle des arcs auroraux. On a observé des épaisseurs d’arcs d’environ 40 m. Ces mesures de l’épaisseur des arcs peuvent servir A vérifier les multiples théories Concernant l’origine des arcs auroraux. Mots clés: aurore boréale, géomagnétisme, ionosphère, Territoires du Nord-Ouest, photographie, polaire ’kaduit pour le journal par Nésida Loyer. Text Arctic Arctic Aurore boréale Northwest Territories Territoires du Nord-Ouest Unknown Arctic Fort Smith ENVELOPE(-111.889,-111.889,60.004,60.004) Ionosphère ENVELOPE(141.583,141.583,-66.767,-66.767) Northwest Territories |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
AURORAL ARCS |
spellingShingle |
AURORAL ARCS Joseph E. Borovsky David M. Suszcynsky Melvin I. Buchwald Harold V. Dehaven ARCTIC Measuring the Thicknesses of Auroral Curtains |
topic_facet |
AURORAL ARCS |
description |
ABSTRACT. Auroral arcs (curtains) are extremely thin. A calculation of the minimum-possible arc thickness is presented; this minimum thickness is found to be about 9.5 m. Four requirements for designing an optical system that can image the thinnest curtains are discussed: 1) angular resolution, 2) temporal resolution, 3) light-gathering power, and 4) data-recording convenience. An optical system meeting these four requirements was constructed. With this system, an observing campaign in Fort Smith, Northwest Territories, has begun and images of the small-scale structure of auroral arcs are presented. Arc thicknesses of approximately 40 m were observed. These measurements of arc thicknesses may provide a critical test for the many theories about the origins of auroral arcs. Key words: aurora, geomagnetism, ionosphere, Northwest Territories, photography, polar RÉSUM~, L ~ S arcs auroraw (draperies) sont extremement minces. On présente un calcul de l’épaisseur minimale possible d’un arc, qui se révèle être de l’ordre de 9,5 m. On discute des quatre Cléments nkcessaires B la conception d’un système optique qui puisse imager les draperies les plus minces, soit: 1) la résolution angulaire, 2) la résolution temporelle, 3) la capacitk de captage de la lumière et 4) la facilité de collecte des données. On a construit un système optique qui répond B ces quatre critères et avec lequel on a commencé une campagne d’observation A Fort Smith dans les Territoires du Nord-Ouest. On présente des images de la structure A petite échelle des arcs auroraux. On a observé des épaisseurs d’arcs d’environ 40 m. Ces mesures de l’épaisseur des arcs peuvent servir A vérifier les multiples théories Concernant l’origine des arcs auroraux. Mots clés: aurore boréale, géomagnétisme, ionosphère, Territoires du Nord-Ouest, photographie, polaire ’kaduit pour le journal par Nésida Loyer. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Joseph E. Borovsky David M. Suszcynsky Melvin I. Buchwald Harold V. Dehaven |
author_facet |
Joseph E. Borovsky David M. Suszcynsky Melvin I. Buchwald Harold V. Dehaven |
author_sort |
Joseph E. Borovsky |
title |
ARCTIC Measuring the Thicknesses of Auroral Curtains |
title_short |
ARCTIC Measuring the Thicknesses of Auroral Curtains |
title_full |
ARCTIC Measuring the Thicknesses of Auroral Curtains |
title_fullStr |
ARCTIC Measuring the Thicknesses of Auroral Curtains |
title_full_unstemmed |
ARCTIC Measuring the Thicknesses of Auroral Curtains |
title_sort |
arctic measuring the thicknesses of auroral curtains |
publishDate |
1991 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.7349 http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf |
long_lat |
ENVELOPE(-111.889,-111.889,60.004,60.004) ENVELOPE(141.583,141.583,-66.767,-66.767) |
geographic |
Arctic Fort Smith Ionosphère Northwest Territories |
geographic_facet |
Arctic Fort Smith Ionosphère Northwest Territories |
genre |
Arctic Arctic Aurore boréale Northwest Territories Territoires du Nord-Ouest |
genre_facet |
Arctic Arctic Aurore boréale Northwest Territories Territoires du Nord-Ouest |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.7349 http://pubs.aina.ucalgary.ca/arctic/Arctic44-3-231.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291489148633088 |