Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I)
From the magnetic pulsation data recorded at the Syowa Station-Iceland conjugate pair, it is found that there are at least two pulsation bands in the Pc 3-5 frequency range in the daytime. 0ne pulsation band occurs in the 20-40 mHz range, while the other band occurs in the 4-8 mHz range, often indep...
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National Institute of Polar Research
1980
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ftdoajarticles:oai:doaj.org/article:a18477f0d9ef47798bc11c5382530e3b 2023-05-15T16:47:49+02:00 Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) Miyoko IWABUCHI Hiroshi FUKUNISHI Natsuo SATO 1980-02-01T00:00:00Z https://doi.org/10.15094/00008138 https://doaj.org/article/a18477f0d9ef47798bc11c5382530e3b EN JA eng jpn National Institute of Polar Research https://doi.org/10.15094/0000813 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008138 0085-7289 2432-079X https://doaj.org/article/a18477f0d9ef47798bc11c5382530e3b Antarctic Record, Iss 68, Pp 294-310 (1980) Geography (General) G1-922 article 1980 ftdoajarticles https://doi.org/10.15094/00008138 https://doi.org/10.15094/0000813 2022-12-31T00:23:36Z From the magnetic pulsation data recorded at the Syowa Station-Iceland conjugate pair, it is found that there are at least two pulsation bands in the Pc 3-5 frequency range in the daytime. 0ne pulsation band occurs in the 20-40 mHz range, while the other band occurs in the 4-8 mHz range, often independently of the 20-40 mHz band. The f-t spectral patterns of these pulsations are quite similar at the coniugate points, with the wave phase characteristics of odd-mode standing oscillations of local magnetic field lines. It is also found that the orientation angles of the polarization ellipses in the H-D plane switch across the magnetic local noon. These results suggest that the 20-40 mHz band and the 4-8 mHz band are standing oscillations of resonant field lines excited by external driving forces such as the Kelvin-Helmholtz instability on the magnetopause and/or the MHD waves generated near the bow shock Article in Journal/Newspaper Iceland Directory of Open Access Journals: DOAJ Articles Syowa Station |
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op_collection_id |
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language |
English Japanese |
topic |
Geography (General) G1-922 |
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Geography (General) G1-922 Miyoko IWABUCHI Hiroshi FUKUNISHI Natsuo SATO Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
topic_facet |
Geography (General) G1-922 |
description |
From the magnetic pulsation data recorded at the Syowa Station-Iceland conjugate pair, it is found that there are at least two pulsation bands in the Pc 3-5 frequency range in the daytime. 0ne pulsation band occurs in the 20-40 mHz range, while the other band occurs in the 4-8 mHz range, often independently of the 20-40 mHz band. The f-t spectral patterns of these pulsations are quite similar at the coniugate points, with the wave phase characteristics of odd-mode standing oscillations of local magnetic field lines. It is also found that the orientation angles of the polarization ellipses in the H-D plane switch across the magnetic local noon. These results suggest that the 20-40 mHz band and the 4-8 mHz band are standing oscillations of resonant field lines excited by external driving forces such as the Kelvin-Helmholtz instability on the magnetopause and/or the MHD waves generated near the bow shock |
format |
Article in Journal/Newspaper |
author |
Miyoko IWABUCHI Hiroshi FUKUNISHI Natsuo SATO |
author_facet |
Miyoko IWABUCHI Hiroshi FUKUNISHI Natsuo SATO |
author_sort |
Miyoko IWABUCHI |
title |
Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
title_short |
Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
title_full |
Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
title_fullStr |
Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
title_full_unstemmed |
Spectral and Polarization Characteristics of Pc 3-5 Magnetic Pulsations Observed at the Syowa Station-Iceland Conjugate Pair (d. ULF Waves in the Magnetosphere) (Proceedings of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the Polar Regions : Part I) |
title_sort |
spectral and polarization characteristics of pc 3-5 magnetic pulsations observed at the syowa station-iceland conjugate pair (d. ulf waves in the magnetosphere) (proceedings of the second symposium on coordinated observations of the ionosphere and magnetosphere in the polar regions : part i) |
publisher |
National Institute of Polar Research |
publishDate |
1980 |
url |
https://doi.org/10.15094/00008138 https://doaj.org/article/a18477f0d9ef47798bc11c5382530e3b |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Antarctic Record, Iss 68, Pp 294-310 (1980) |
op_relation |
https://doi.org/10.15094/0000813 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008138 0085-7289 2432-079X https://doaj.org/article/a18477f0d9ef47798bc11c5382530e3b |
op_doi |
https://doi.org/10.15094/00008138 https://doi.org/10.15094/0000813 |
_version_ |
1766037924489461760 |