Magnetic Pulsation Conjugacy and Its Mechanisms
A brief review and discussion is given of an investigation of the characteristics of the naturally-occurring ULF plasma waves in the magnetosphere near L=4. The investigation was carried out using similarly-instrumented magnetometer stations at Siple, Antarctica and in the conjugate region at Lac Re...
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Bell Laboratories
1974
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ftnipr:oai:nipr.repo.nii.ac.jp:00000811 2023-05-15T13:47:58+02:00 Magnetic Pulsation Conjugacy and Its Mechanisms L.J. Lanzerotti 1974-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=811 http://id.nii.ac.jp/1291/00000811/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=811&item_no=1&attribute_id=18&file_no=1 en eng Bell Laboratories https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=811 http://id.nii.ac.jp/1291/00000811/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 3, 61-76(1974-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=811&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1974 ftnipr 2022-11-12T19:41:42Z A brief review and discussion is given of an investigation of the characteristics of the naturally-occurring ULF plasma waves in the magnetosphere near L=4. The investigation was carried out using similarly-instrumented magnetometer stations at Siple, Antarctica and in the conjugate region at Lac Rebours, Quebec. The waves were predominantly in the Pc-3 frequency range. No magnetospheric waves that satisfied an imposed strict selection criterion were observed after ∿1700 LT. Approximately half of the 94 accepted events were left-hand elliptically polarized, with no significant change in polarization characteristics observed as a function of local time. However, a distinct preferential orientation direction as a function of local time was observed for the major axes of the polarization ellipses. Approximately 16% of the events had opposite polarizations in the two hemispheres; this may be a manifestation of occasional station non-conjugacy combined with a narrow (in latitude) extent of wave localization. All but two of the events were symmetrical about the meridian plane, implying an odd-mode standing oscillation of the geomagnetic field lines. A significant local time dependence observed in the relative orientations of the plane of the Pc-3 waves is interpreted as a possible effect of the ionosphere on the transmission of the ULF waves. Report Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
A brief review and discussion is given of an investigation of the characteristics of the naturally-occurring ULF plasma waves in the magnetosphere near L=4. The investigation was carried out using similarly-instrumented magnetometer stations at Siple, Antarctica and in the conjugate region at Lac Rebours, Quebec. The waves were predominantly in the Pc-3 frequency range. No magnetospheric waves that satisfied an imposed strict selection criterion were observed after ∿1700 LT. Approximately half of the 94 accepted events were left-hand elliptically polarized, with no significant change in polarization characteristics observed as a function of local time. However, a distinct preferential orientation direction as a function of local time was observed for the major axes of the polarization ellipses. Approximately 16% of the events had opposite polarizations in the two hemispheres; this may be a manifestation of occasional station non-conjugacy combined with a narrow (in latitude) extent of wave localization. All but two of the events were symmetrical about the meridian plane, implying an odd-mode standing oscillation of the geomagnetic field lines. A significant local time dependence observed in the relative orientations of the plane of the Pc-3 waves is interpreted as a possible effect of the ionosphere on the transmission of the ULF waves. |
format |
Report |
author |
L.J. Lanzerotti |
spellingShingle |
L.J. Lanzerotti Magnetic Pulsation Conjugacy and Its Mechanisms |
author_facet |
L.J. Lanzerotti |
author_sort |
L.J. Lanzerotti |
title |
Magnetic Pulsation Conjugacy and Its Mechanisms |
title_short |
Magnetic Pulsation Conjugacy and Its Mechanisms |
title_full |
Magnetic Pulsation Conjugacy and Its Mechanisms |
title_fullStr |
Magnetic Pulsation Conjugacy and Its Mechanisms |
title_full_unstemmed |
Magnetic Pulsation Conjugacy and Its Mechanisms |
title_sort |
magnetic pulsation conjugacy and its mechanisms |
publisher |
Bell Laboratories |
publishDate |
1974 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=811 http://id.nii.ac.jp/1291/00000811/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=811&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
geographic |
Siple |
geographic_facet |
Siple |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=811 http://id.nii.ac.jp/1291/00000811/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 3, 61-76(1974-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=811&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248209610440704 |