中華衛星一號觀測電離層較大的電漿氣泡在季節及經度之統計與研究; Longitudinal and Seasonal Variations for the Occurrence of Large Depletions Observed by ROCSAT-1 at 600 km Altitude

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Title:	中華衛星一號觀測電離層較大的電漿氣泡在季節及經度之統計與研究;Longitudinal and Seasonal Variations for the Occurrence of Large Depletions Observed by ROCSAT-1 at 600 km Altitude
Authors:	江峻毅;Jun-Yi Jiang
Contributors:	太空科學研究所
Keywords:	電漿氣泡;電離層;中華衛星一號;Large Depletions;plasma bubble
Date:	2004-06-17
Issue Date:	2009-09-22 09:46:43 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	利用中華衛星一號上之電離層電漿電動效應酬載儀（IPEI）所量測到氧離子的密度資料，來研究電離層密度不規則體的特性，對傍晚至日出所產生的電離層氣泡（Bubble）的特性加以研究。我們選擇寬度ΔLON ≧ 1.212°以及深度Δ㏒N ≧ 1.054的電離層電漿氣泡（Bubbles）為基準。本篇論文選取1999年春季至2001年春季的大Bubbles資料，主要研究這些較大氣泡在季節及經度的產生特性。大Bubble 的寬度即為磁力管線寬，因此在大氣泡生成後寬度不會改變，而大氣泡的深度受到上衝速度影響，當上衝速度愈大密度愈低，深度也就越深，因此在同樣的寬度卻有大小不等的深度。由這兩年所選取的大Bubble 分佈來看，主要集中於地理經度280°?360°的範圍，而在夏季時，大Bubble 主要產生的位置在地理經度0°?50°及150°?280°，冬季則是在地理經度0°?75°、280°?360°的範圍。此外，在Kp<3時，大Bubble 幾乎都出現在午夜之前，然而在Kp≧3時，午夜之後也較容易出現大bubble。 Gathered between the year 1999 to 2001from the ion trop sensor on the ROCSAT-1, a satellite in a circular orbit at the height of 600km, the high resolution ion density data in the equatorial spread F (ESF) events are analyzed in the thesis. We analyze the relationship of the plasma bubbles with width and depth, and them are not relational. The occurrence distributions of the plasma bubbles with seasons, locations, and magnetic activities have been obtained. During quite times, the ESF events are most likely to occur around 2000 LT. With the increase in magnetic activity, the plasma bubbles appear frequently from midnight to sunrise. The probability of the plasma bubbles occurrence is always high near 0°longitude during 2 year long. The seasonal occurrence is such that it is high in the pacific regions (between 150° and 280° longitude) during northern summer and in the south of America (between 280°and 360°longitude) during northern winter.
Appears in Collections:	[Graduate Institute of Space Science] Department of Earth Sciences

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