Conjugate observation of periodic VLF emissions near L=6
P(論文) Conjugate observation of VLF emission was carried out at Kitdalen (69.1°N, 20.3°E geographic, 65.5°N, 105.3°E geomagnetic, L=6.0) in Norway and at Syowa Station (69.0°S, 39.6°E geographic, 66.2°S, 70.5°E geomagnetic, L=6.1) in Antarctica in February 1980,and also at Andφya (69.2°N, 16.0°E geog...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001595 2024-09-09T19:10:20+00:00 Conjugate observation of periodic VLF emissions near L=6 Yamagishi, Hisao Fukunishi, Hiroshi Kojima, Toshiharu Yoshino, Takeo Gendrin, Roger 1984-07 application/pdf https://nipr.repo.nii.ac.jp/record/1595/files/KJ00000012228.pdf eng eng Memoirs of National Institute of Polar Research. Special issue 31 96 114 AA00733561 https://nipr.repo.nii.ac.jp/record/1595/files/KJ00000012228.pdf 1984 ftnipr 2024-06-17T04:00:49Z P(論文) Conjugate observation of VLF emission was carried out at Kitdalen (69.1°N, 20.3°E geographic, 65.5°N, 105.3°E geomagnetic, L=6.0) in Norway and at Syowa Station (69.0°S, 39.6°E geographic, 66.2°S, 70.5°E geomagnetic, L=6.1) in Antarctica in February 1980,and also at Andφya (69.2°N, 16.0°E geographic, 66.0°N, 102.2°E geomagnetic, L=6.1) in Norway and at Syowa in March 1982. During these campaign periods, periodic VLF emissions were often observed at both stations in opposite hemispheres. A typical periodic emission event observed at both stations was chosen for cross spectral analysis of the emission period. The results show the characteristics of "symmetrical three-phase emission" reported by BRICE (Radio Sci., 69D, 257,1965) as three wave packets, which were symmetrically spaced along the line of force, were echoing in the magnetosphere. Though the geomagnetically conjugate point of Syowa is located about 1800km far from Kitdalen or Andφya, the common nature of the emissions observed at both stations suggests that the periodic emission which originates from the common source in the magnetosphere can spread more than 1800km at the ionospheric level. This observational result is compared with the ray tracing calculation. It is concluded that if the periodic emissions are guided by a field-aligned duct and the duct is terminated at an altitude of 6000km, the periodic emissions can spread as far as the observed distance. departmental bulletin paper Other/Unknown Material Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Brice ENVELOPE(-72.600,-72.600,-75.368,-75.368) Kitdalen ENVELOPE(20.085,20.085,69.240,69.240) Norway Syowa Station |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
P(論文) Conjugate observation of VLF emission was carried out at Kitdalen (69.1°N, 20.3°E geographic, 65.5°N, 105.3°E geomagnetic, L=6.0) in Norway and at Syowa Station (69.0°S, 39.6°E geographic, 66.2°S, 70.5°E geomagnetic, L=6.1) in Antarctica in February 1980,and also at Andφya (69.2°N, 16.0°E geographic, 66.0°N, 102.2°E geomagnetic, L=6.1) in Norway and at Syowa in March 1982. During these campaign periods, periodic VLF emissions were often observed at both stations in opposite hemispheres. A typical periodic emission event observed at both stations was chosen for cross spectral analysis of the emission period. The results show the characteristics of "symmetrical three-phase emission" reported by BRICE (Radio Sci., 69D, 257,1965) as three wave packets, which were symmetrically spaced along the line of force, were echoing in the magnetosphere. Though the geomagnetically conjugate point of Syowa is located about 1800km far from Kitdalen or Andφya, the common nature of the emissions observed at both stations suggests that the periodic emission which originates from the common source in the magnetosphere can spread more than 1800km at the ionospheric level. This observational result is compared with the ray tracing calculation. It is concluded that if the periodic emissions are guided by a field-aligned duct and the duct is terminated at an altitude of 6000km, the periodic emissions can spread as far as the observed distance. departmental bulletin paper |
author |
Yamagishi, Hisao Fukunishi, Hiroshi Kojima, Toshiharu Yoshino, Takeo Gendrin, Roger |
spellingShingle |
Yamagishi, Hisao Fukunishi, Hiroshi Kojima, Toshiharu Yoshino, Takeo Gendrin, Roger Conjugate observation of periodic VLF emissions near L=6 |
author_facet |
Yamagishi, Hisao Fukunishi, Hiroshi Kojima, Toshiharu Yoshino, Takeo Gendrin, Roger |
author_sort |
Yamagishi, Hisao |
title |
Conjugate observation of periodic VLF emissions near L=6 |
title_short |
Conjugate observation of periodic VLF emissions near L=6 |
title_full |
Conjugate observation of periodic VLF emissions near L=6 |
title_fullStr |
Conjugate observation of periodic VLF emissions near L=6 |
title_full_unstemmed |
Conjugate observation of periodic VLF emissions near L=6 |
title_sort |
conjugate observation of periodic vlf emissions near l=6 |
publishDate |
1984 |
url |
https://nipr.repo.nii.ac.jp/record/1595/files/KJ00000012228.pdf |
long_lat |
ENVELOPE(-72.600,-72.600,-75.368,-75.368) ENVELOPE(20.085,20.085,69.240,69.240) |
geographic |
Brice Kitdalen Norway Syowa Station |
geographic_facet |
Brice Kitdalen Norway Syowa Station |
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 |
Memoirs of National Institute of Polar Research. Special issue 31 96 114 AA00733561 https://nipr.repo.nii.ac.jp/record/1595/files/KJ00000012228.pdf |
_version_ |
1809825195847843840 |