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タイトル: | High-speed stereoscopy of aurora |
著者: | Kataoka, R. Fukuda, Y. Uchida, H. A. Yamada, H. Miyoshi, Y. Ebihara, Y. Dahlgren, H. Hampton, D. |
著者名の別形: | 海老原, 祐輔 |
キーワード: | Ionosphere (auroral ionosphere) |
発行日: | 18-Jan-2016 |
出版者: | Copernicus GmbH |
誌名: | Annales Geophysicae |
巻: | 34 |
号: | 1 |
開始ページ: | 41 |
終了ページ: | 44 |
抄録: | We performed 100 fps stereoscopic imaging of aurora for the first time. Two identical sCMOS cameras equipped with narrow field-of-view lenses (15° by 15°) were directed at magnetic zenith with the north-south base distance of 8.1 km. Here we show the best example that a rapidly pulsating diffuse patch and a streaming discrete arc were observed at the same time with different parallaxes, and the emission altitudes were estimated as 85-95 km and > 100 km, respectively. The estimated emission altitudes are consistent with those estimated in previous studies, and it is suggested that high-speed stereoscopy is useful to directly measure the emission altitudes of various types of rapidly varying aurora. It is also found that variation of emission altitude is gradual (e.g., 10 km increase over 5 s) for pulsating patches and is fast (e.g., 10 km increase within 0.5 s) for streaming arcs. |
著作権等: | © Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. |
URI: | http://hdl.handle.net/2433/214293 |
DOI(出版社版): | 10.5194/angeo-34-41-2016 |
出現コレクション: | 学術雑誌掲載論文等 |
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