Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer
Two radars were used simultaneously to study naturally occurring electron heating events in the auroral E-region ionosphere. During a joint campaign in March 1986 the Cornell University Portable Radar Interferometer (CUPRI) was positioned to look perpendicular to the magnetic field to observe unstab...
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ftutahsudc:oai:digitalcommons.usu.edu:physics_facpub-2344 2023-05-15T16:04:32+02:00 Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer Providakes, J. Farley, D. T. Fejer, B. G. Sahr, J. Swartz, W. E. Haggstrom, I. Hedberg, A. Nordling, J. A. Elsevier 1988-01-01T08:00:00Z https://digitalcommons.usu.edu/physics_facpub/1344 unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/physics_facpub/1344 Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. PDM All Physics Faculty Publications Physics text 1988 ftutahsudc 2022-03-07T22:26:29Z Two radars were used simultaneously to study naturally occurring electron heating events in the auroral E-region ionosphere. During a joint campaign in March 1986 the Cornell University Portable Radar Interferometer (CUPRI) was positioned to look perpendicular to the magnetic field to observe unstable plasma waves over Tromsø, Norway, while EISCAT measured the ambient conditions in the unstable region. On two nights EISCAT detected intense but short lived (< 1 min) electron heating events during which the temperature suddenly increased by a factor of 2–4 at altitudes near 108 km and the electron densities were less than 7 × 104 cm−3. On the second of these nights CUPRI was operating and detected strong plasma waves with very large phase velocities at precisely the altitudes and times at which the heating was observed. The altitudes, as well as one component of the irregularity drift velocity, were determined by interferometric techniques. From the observations and our analysis, we conclude that the electron temperature increases were caused by plasma wave heating and not by either Joule heating or particle precipitation. Text EISCAT Tromsø Utah State University: DigitalCommons@USU Norway Tromsø |
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Utah State University: DigitalCommons@USU |
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Physics |
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Physics Providakes, J. Farley, D. T. Fejer, B. G. Sahr, J. Swartz, W. E. Haggstrom, I. Hedberg, A. Nordling, J. A. Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
topic_facet |
Physics |
description |
Two radars were used simultaneously to study naturally occurring electron heating events in the auroral E-region ionosphere. During a joint campaign in March 1986 the Cornell University Portable Radar Interferometer (CUPRI) was positioned to look perpendicular to the magnetic field to observe unstable plasma waves over Tromsø, Norway, while EISCAT measured the ambient conditions in the unstable region. On two nights EISCAT detected intense but short lived (< 1 min) electron heating events during which the temperature suddenly increased by a factor of 2–4 at altitudes near 108 km and the electron densities were less than 7 × 104 cm−3. On the second of these nights CUPRI was operating and detected strong plasma waves with very large phase velocities at precisely the altitudes and times at which the heating was observed. The altitudes, as well as one component of the irregularity drift velocity, were determined by interferometric techniques. From the observations and our analysis, we conclude that the electron temperature increases were caused by plasma wave heating and not by either Joule heating or particle precipitation. |
author2 |
Elsevier |
format |
Text |
author |
Providakes, J. Farley, D. T. Fejer, B. G. Sahr, J. Swartz, W. E. Haggstrom, I. Hedberg, A. Nordling, J. A. |
author_facet |
Providakes, J. Farley, D. T. Fejer, B. G. Sahr, J. Swartz, W. E. Haggstrom, I. Hedberg, A. Nordling, J. A. |
author_sort |
Providakes, J. |
title |
Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
title_short |
Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
title_full |
Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
title_fullStr |
Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
title_full_unstemmed |
Observations of auroral E region plasma waves and electron heating withEISCAT and a VHF radar interferometer |
title_sort |
observations of auroral e region plasma waves and electron heating witheiscat and a vhf radar interferometer |
publisher |
Hosted by Utah State University Libraries |
publishDate |
1988 |
url |
https://digitalcommons.usu.edu/physics_facpub/1344 |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
EISCAT Tromsø |
genre_facet |
EISCAT Tromsø |
op_source |
All Physics Faculty Publications |
op_relation |
https://digitalcommons.usu.edu/physics_facpub/1344 |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
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PDM |
_version_ |
1766400114426904576 |