Measuring the Thickness of Auroral Curtains
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...
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The Arctic Institute of North America
1991
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64597 2023-05-15T14:19:12+02:00 Measuring the Thickness of Auroral Curtains Suszcynsky, David M. Borovsky, Joseph E. Buchwald, Melvin I. DeHaven, Harold V. 1991-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597/48511 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597 ARCTIC; Vol. 44 No. 3 (1991): September: 177–265; 231-238 1923-1245 0004-0843 Auroras Geomagnetism Ionosphere Photography Alaska Alberta Northern Arctic regions Labrador Manitoba N.W.T Nouveau-Québec Nunavut Saskatchewan info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1991 ftunivcalgaryojs 2022-03-22T21:21:48Z 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 Mots clés: aurore boréale, géomagnétisme, ionosphère, Territoires du Nord-Ouest, photographie, polaire Article in Journal/Newspaper Arctic Arctic Aurore boréale Northwest Territories Nunavut Territoires du Nord-Ouest Alaska University of Calgary Journal Hosting Arctic Fort Smith ENVELOPE(-111.889,-111.889,60.004,60.004) Ionosphère ENVELOPE(141.583,141.583,-66.767,-66.767) Northwest Territories Nunavut ARCTIC 44 3 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Auroras Geomagnetism Ionosphere Photography Alaska Alberta Northern Arctic regions Labrador Manitoba N.W.T Nouveau-Québec Nunavut Saskatchewan |
spellingShingle |
Auroras Geomagnetism Ionosphere Photography Alaska Alberta Northern Arctic regions Labrador Manitoba N.W.T Nouveau-Québec Nunavut Saskatchewan Suszcynsky, David M. Borovsky, Joseph E. Buchwald, Melvin I. DeHaven, Harold V. Measuring the Thickness of Auroral Curtains |
topic_facet |
Auroras Geomagnetism Ionosphere Photography Alaska Alberta Northern Arctic regions Labrador Manitoba N.W.T Nouveau-Québec Nunavut Saskatchewan |
description |
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 Mots clés: aurore boréale, géomagnétisme, ionosphère, Territoires du Nord-Ouest, photographie, polaire |
format |
Article in Journal/Newspaper |
author |
Suszcynsky, David M. Borovsky, Joseph E. Buchwald, Melvin I. DeHaven, Harold V. |
author_facet |
Suszcynsky, David M. Borovsky, Joseph E. Buchwald, Melvin I. DeHaven, Harold V. |
author_sort |
Suszcynsky, David M. |
title |
Measuring the Thickness of Auroral Curtains |
title_short |
Measuring the Thickness of Auroral Curtains |
title_full |
Measuring the Thickness of Auroral Curtains |
title_fullStr |
Measuring the Thickness of Auroral Curtains |
title_full_unstemmed |
Measuring the Thickness of Auroral Curtains |
title_sort |
measuring the thickness of auroral curtains |
publisher |
The Arctic Institute of North America |
publishDate |
1991 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597 |
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 Nunavut |
geographic_facet |
Arctic Fort Smith Ionosphère Northwest Territories Nunavut |
genre |
Arctic Arctic Aurore boréale Northwest Territories Nunavut Territoires du Nord-Ouest Alaska |
genre_facet |
Arctic Arctic Aurore boréale Northwest Territories Nunavut Territoires du Nord-Ouest Alaska |
op_source |
ARCTIC; Vol. 44 No. 3 (1991): September: 177–265; 231-238 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597/48511 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64597 |
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