Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region
Dynamic spectral characteristics of magnetic pulsations in the frequency range from Pc 3 to Pc 5 are examined on the basis of simultaneous observations at Cambridge Bay in the north polar cusp region and Fort Smith in the auroral zone. Both stations are located at almost the same longitude. In the d...
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Faculty of Science, Tohoku University
1985
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ftnipr:oai:nipr.repo.nii.ac.jp:00001745 2023-05-15T15:48:33+02:00 Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region Yoshio Kato Yutaka Tonegawa Kiyoshi Tomomura 1985-07 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1745 http://id.nii.ac.jp/1291/00001745/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1745&item_no=1&attribute_id=18&file_no=1 en eng Faculty of Science, Tohoku University /Department of Aeronautics and Astronautics, Tokai University Department of Aeronautics and Astronautics, Tokai University https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1745 http://id.nii.ac.jp/1291/00001745/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 36, 58-63(1985-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1745&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1985 ftnipr 2022-11-12T19:42:34Z Dynamic spectral characteristics of magnetic pulsations in the frequency range from Pc 3 to Pc 5 are examined on the basis of simultaneous observations at Cambridge Bay in the north polar cusp region and Fort Smith in the auroral zone. Both stations are located at almost the same longitude. In the dynamic spectra observed at both stations two predominant spectral bands are generally seen in the frequency ranges of Pc 3 (20-80mHz) and Pc 4/5 (3-10mHz). Although spectral peaks in the Pc 3 and Pc 4/5 bands are shown at almost the same frequencies for both stations, sharpness (Q value) of the peaks is very different between the stations. The spectral peaks at Fort Smith are much sharper than those at Cambridge Bay. These observed features are discussed in the light of propagation and resonance mechanism of Pc 3 and Pc 4/5 waves in the magnetosphere. Report Cambridge Bay Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Cambridge Bay ENVELOPE(-105.130,-105.130,69.037,69.037) Fort Smith ENVELOPE(-111.889,-111.889,60.004,60.004) |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Dynamic spectral characteristics of magnetic pulsations in the frequency range from Pc 3 to Pc 5 are examined on the basis of simultaneous observations at Cambridge Bay in the north polar cusp region and Fort Smith in the auroral zone. Both stations are located at almost the same longitude. In the dynamic spectra observed at both stations two predominant spectral bands are generally seen in the frequency ranges of Pc 3 (20-80mHz) and Pc 4/5 (3-10mHz). Although spectral peaks in the Pc 3 and Pc 4/5 bands are shown at almost the same frequencies for both stations, sharpness (Q value) of the peaks is very different between the stations. The spectral peaks at Fort Smith are much sharper than those at Cambridge Bay. These observed features are discussed in the light of propagation and resonance mechanism of Pc 3 and Pc 4/5 waves in the magnetosphere. |
format |
Report |
author |
Yoshio Kato Yutaka Tonegawa Kiyoshi Tomomura |
spellingShingle |
Yoshio Kato Yutaka Tonegawa Kiyoshi Tomomura Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
author_facet |
Yoshio Kato Yutaka Tonegawa Kiyoshi Tomomura |
author_sort |
Yoshio Kato |
title |
Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
title_short |
Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
title_full |
Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
title_fullStr |
Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
title_full_unstemmed |
Dynamic spectral study of Pc 3-5 magnetic pulsations observed in the north polar cusp region |
title_sort |
dynamic spectral study of pc 3-5 magnetic pulsations observed in the north polar cusp region |
publisher |
Faculty of Science, Tohoku University |
publishDate |
1985 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1745 http://id.nii.ac.jp/1291/00001745/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1745&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-105.130,-105.130,69.037,69.037) ENVELOPE(-111.889,-111.889,60.004,60.004) |
geographic |
Cambridge Bay Fort Smith |
geographic_facet |
Cambridge Bay Fort Smith |
genre |
Cambridge Bay Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Cambridge Bay Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1745 http://id.nii.ac.jp/1291/00001745/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 36, 58-63(1985-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1745&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766383536378478592 |