タイトル | Identification of full-substorm onset from ground-magnetometer data by singular value transformation |
DOI | info:doi/10.5109/19197 |
本文(外部サイト) | https://catalog.lib.kyushu-u.ac.jp/opac_download_md/19197/p063.pdf |
参考URL | http://hdl.handle.net/2324/19197 |
著者(英) | Tokunaga, Terumasa; Yumoto, Kiyohumi; Uozumi, Teiji; CPMN Group |
発行日 | 2011-03-17 |
発行機関など | Faculty of Science, Kyushu University |
刊行物名 | Memoirs of the Faculty of Science, Kyushu University. Series D, Earth and planetary sciences |
巻 | 32 |
号 | 3 |
開始ページ | 63 |
終了ページ | 73 |
刊行年月日 | 2011-03-10 |
言語 | eng |
内容記述 | Pi 2 magnetic pulsations observed on the ground are a good indicator of the auroral breakup. However, they have not only corresponding full-substorm onsets but also most pseudobreakups. Another well-known substorm related phenomenon observed on the ground is positive bays. In order to identify full-substorm onsets from ground-magnetometer data, we developed a new algorithm based on "Singular Spectrum Analysis(SSA)". The algorithm enables us to screen Pi 2 pulsations accompanied by the magnetic positive bay. We applied proposed algorithm to ground-magnetometer data and compared to the obtained results with Polar/UVI data. As a result, we succeeded in identifying 62% of the full-substorm onsets from ground-magnetometer data obtained in the nighttime sector between 21 and 03LT. |
キーワード | auroral substorm; Pi 2 pulsation; positive bay; Singular Value Transformation |
資料種別 | Departmental Bulletin Paper |
著者版フラグ | publisher |
ISSN | 0916-7390 |
NCID | AA10816494 |