第8次南極地域観測越冬隊極光部門報告(1967-1968)
The auroral observations carried out by the 8th wintering party of the Japanese Antarctic Research Expedition, 1967-68, included 1 All-sky camera 2 Visual and photographic observations of aurora 3 Observation of auroral pulsations 4 Auroral photometry along the geomagnetic meridian 5 Observation of...
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東京大学地震研究所
1969
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ftnipr:oai:nipr.repo.nii.ac.jp:00007553 2023-07-02T03:30:23+02:00 第8次南極地域観測越冬隊極光部門報告(1967-1968) ダイ8ジ ナンキョク チイキ カンソク エットウタイ キョクコウ ブモン ホウコク (1967-1968) 神沼 克伊 平沢 威男 Katsutada KAMINUMA Takeo HIRASAWA 1969-07 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=7553 http://id.nii.ac.jp/1291/00007553/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=7553&item_no=1&attribute_id=18&file_no=1 ja jpn 東京大学地震研究所 東京大学理学部地球物理学研究施設 Earthquake Research Institute, University of Tokyo Geophysics Research Laboratory, University of Tokyo 国立極地研究所 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=7553 http://id.nii.ac.jp/1291/00007553/ AN00181831 00857289 南極資料, 35, 22-34f(1969-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=7553&item_no=1&attribute_id=18&file_no=1 551.510.535/.537 Departmental Bulletin Paper P(論文) 1969 ftnipr 2023-06-10T19:38:20Z The auroral observations carried out by the 8th wintering party of the Japanese Antarctic Research Expedition, 1967-68, included 1 All-sky camera 2 Visual and photographic observations of aurora 3 Observation of auroral pulsations 4 Auroral photometry along the geomagnetic meridian 5 Observation of the auroral radio noise A description of each observation and obtained results are briefly given 1 Auroral pulsations A special photometer was designed for investigating the detailed characteristics of auroral pulsations and their relationships with geomagnetic pulsations The photometer (Fig 1) consists of a single telescope equipped with a band-pass filter (4278 A) The field of view is 5° The amplified anode current of the RCA lp21 photomultipliers is fed to three electrical band-pass filters (f_1, 001-01 Hz, f_2, 01-2 Hz, f_3, 2-30 Hz), and recorded by a slow running tape-recorder The outputs of the band-pass filters are separately registered on multi-channel pen recorders together with the signals of the geomagnetic pulsations By means of this photometric system, data of more than 300 clear night hours were recorded (Fig 3) Figs 4-8 illustlate the various types of auroral luminosity fluctuations together with the geomagnetic field fluctuations Auroral pulsations observed at Syowa Station can be classified into the following five types. A. Irregular fluctuations with large amplitudes (a few tens of KR) observed mostly at the onset of an auroral substorm (Fig 4) B Pulse-like auroral pulsations with a period of about 20-40 seconds, the amplitudes of which are sometimes greater than 10 KR Pulsations of this type are frequently observed in the early morning hours of magnetic disturbed days (Fig 5). C Long-lived auroral pulsations with a sinusoidal waveform. Their periods and amplitudes are about 10 seconds and a few KR, respectively. This type is dominant in the morning hours (Fig. 6). D. Rapid fluctuations of auroral luminosity with a period of about 2-0.5 seconds (Fig 7, A and B). E. Extremely rapid fluctuations with ... Report Antarc* Antarctic National Institute of Polar Research Repository, Japan Antarctic Syowa Station |
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National Institute of Polar Research Repository, Japan |
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Japanese |
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551.510.535/.537 |
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551.510.535/.537 神沼 克伊 平沢 威男 Katsutada KAMINUMA Takeo HIRASAWA 第8次南極地域観測越冬隊極光部門報告(1967-1968) |
topic_facet |
551.510.535/.537 |
description |
The auroral observations carried out by the 8th wintering party of the Japanese Antarctic Research Expedition, 1967-68, included 1 All-sky camera 2 Visual and photographic observations of aurora 3 Observation of auroral pulsations 4 Auroral photometry along the geomagnetic meridian 5 Observation of the auroral radio noise A description of each observation and obtained results are briefly given 1 Auroral pulsations A special photometer was designed for investigating the detailed characteristics of auroral pulsations and their relationships with geomagnetic pulsations The photometer (Fig 1) consists of a single telescope equipped with a band-pass filter (4278 A) The field of view is 5° The amplified anode current of the RCA lp21 photomultipliers is fed to three electrical band-pass filters (f_1, 001-01 Hz, f_2, 01-2 Hz, f_3, 2-30 Hz), and recorded by a slow running tape-recorder The outputs of the band-pass filters are separately registered on multi-channel pen recorders together with the signals of the geomagnetic pulsations By means of this photometric system, data of more than 300 clear night hours were recorded (Fig 3) Figs 4-8 illustlate the various types of auroral luminosity fluctuations together with the geomagnetic field fluctuations Auroral pulsations observed at Syowa Station can be classified into the following five types. A. Irregular fluctuations with large amplitudes (a few tens of KR) observed mostly at the onset of an auroral substorm (Fig 4) B Pulse-like auroral pulsations with a period of about 20-40 seconds, the amplitudes of which are sometimes greater than 10 KR Pulsations of this type are frequently observed in the early morning hours of magnetic disturbed days (Fig 5). C Long-lived auroral pulsations with a sinusoidal waveform. Their periods and amplitudes are about 10 seconds and a few KR, respectively. This type is dominant in the morning hours (Fig. 6). D. Rapid fluctuations of auroral luminosity with a period of about 2-0.5 seconds (Fig 7, A and B). E. Extremely rapid fluctuations with ... |
format |
Report |
author |
神沼 克伊 平沢 威男 Katsutada KAMINUMA Takeo HIRASAWA |
author_facet |
神沼 克伊 平沢 威男 Katsutada KAMINUMA Takeo HIRASAWA |
author_sort |
神沼 克伊 |
title |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
title_short |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
title_full |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
title_fullStr |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
title_full_unstemmed |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
title_sort |
第8次南極地域観測越冬隊極光部門報告(1967-1968) |
publisher |
東京大学地震研究所 |
publishDate |
1969 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=7553 http://id.nii.ac.jp/1291/00007553/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=7553&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=7553 http://id.nii.ac.jp/1291/00007553/ AN00181831 00857289 南極資料, 35, 22-34f(1969-07) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=7553&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1770274588219932672 |