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Simultaneous ground-based and satellite observations of natural VLF waves in Antarctica: A case study of downward ionospheric penetration of whistler-mode waves
https://nipr.repo.nii.ac.jp/records/10185
https://nipr.repo.nii.ac.jp/records/10185fb8394ad-75c7-4b62-8d1c-82d70578e671
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2014-10-16 | |||||
タイトル | ||||||
タイトル | Simultaneous ground-based and satellite observations of natural VLF waves in Antarctica: A case study of downward ionospheric penetration of whistler-mode waves | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Simultaneous ground-based and satellite observations of natural VLF waves in Antarctica: A case study of downward ionospheric penetration of whistler-mode waves | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Downward ionospheric penetration | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | VLF whistler-mode waves | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Akebono satellite | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Full-wave analysis | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Downward ionospheric penetration | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | VLF whistler-mode waves | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Akebono satellite | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Full-wave analysis | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Ozaki, M.
× Ozaki, M.× Yagitani, S.× Nagano, I.× Kasahara, Y.× Yamagishi, H.× Satom, N.× Kadokura, A.× Ozaki, M.× Yagitani, S.× Nagano, I.× Kasahara, Y.× Yamagishi, H.× Satom, N.× Kadokura, A. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | To investigate downward ionospheric-penetration characteristics of VLF (several hundred Hz to 17.8 kHz) whistler-mode waves, we conducted simultaneous observations (in 2006) of natural VLF waves using both ground stations in Antarctica and the Japanese Akebono satellite. The ground-based and satellite observations included an interesting event for which both observed similar VLF waves. In this study, we theoretically calculate down-going whistler-mode wave propagation based on ground-satellite observations using the full-wave analysis. In a case study, the observed wave-normal angles were approximately 140-160 degrees for a dayside chorus event on 15 March 2006. The theoretical calculation showed that the wave-normal angles for ionosphericpenetration should be around 155.6 degrees, with its angular width of approximately 2 degrees. Moreover, the wave-energy loss due to ionospheric penetration is estimated at 20.4 dB based on our theoretical calculation, in accordance with the observed 17-19 dB. | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | ホイスラモード波の電離層透過特性を詳細に調べるために、2006年南極において地上とあけぼの衛星によるVLF(数百Hz~17.8 kHz)帯の自然電磁波動の同時観測を行った。この観測において、地上とあけぼの衛星で波動強度の周波数特性がよく似た自然VLF波動のイベントを得た。本研究では、この同時観測結果に基づきfull-wave解析を用いることによって理論的にホイスラモードの下降伝搬を計算している。事例解析として2006年3月15日のコーラスの同時観測イベントに対して、あけぼの衛星で観測された波動伝搬ベクトルは140~160度に分布した。一方で理論計算では、電離層透過のための波動伝搬ベクトルは155.6度、その角度幅約2度になる必要があるという結果を得た。さらに、電離層透過に対する波動エネルギーの減衰は、観測値の17~19 dBに一致して理論計算では20.4 dBと推定された。 | |||||
書誌情報 |
Polar science en : Polar science 巻 4, 号 3, p. 431-441, 発行日 2010-12 |
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出版者 | ||||||
出版者 | 国立極地研究所 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12240481 | |||||
論文ID(NAID) | ||||||
識別子タイプ | NAID | |||||
関連識別子 | 110007721874 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://doi.org/10.1016/j.polar.2010.04.008 | |||||
関連名称 | 10.1016/j.polar.2010.04.008 |