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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Equatorial plasma bubble ： ウィキペディア英語版 Equatorial plasma bubble Equatorial plasma bubbles are an ionospheric phenomenon near the Earth's geomagnetic equator at night time. They affect radio waves by causing varying delays. They degrade the performance of GPS. Different times of the year and location have different frequencies of occurrence. In Northern Australia, the most common times are February to April and August to October, when a plasma bubble is expected every night.〔 Plasma bubbles have dimensions around 100 km.〔 Plasma bubbles form after dark when the sun stops ionising the ionosphere. The ions recombine, forming a lower density layer. This layer can rise through the more ionised layers above via convection, which makes a plasma bubble. The bubbles are turbulent with irregular edges.〔 An equatorial plasma bubble affected the Battle of Shah-i-Kot by disabling communications from a communications satellite to a helicopter. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Equatorial plasma bubble」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.