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姓名 楊志強(Zhi-Jiang Yang) 查詢紙本館藏 畢業系所 太空科學研究所 論文名稱 中華衛星一號觀測頂部電離層重離子含量異常之研究
(Study of anomalous concentration of molecular ions observed by ROCSAT-1 in the topside ionosphere)相關論文 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] [檢視] [下載]
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摘要(中) 摘要
本文利用中華衛星一號上的電離層電漿及電動效應儀 (IPEI) 在2000年所收集到的相關資料,研究頂部電離層重離子(主要是NO+)含量異常的分布與發生機制。西元2000年正值太陽黑子活動最大期。IPEI所觀測到的重離子分布約可歸納為兩類。第一類是在地磁活動寧靜期所觀測到存在於磁赤道附近的O+離子密度極低區。這些重離子可能是電漿泡自底部快速上升到頂部電離層來。第二類是在巨型磁暴發生期衛星所觀測到的,比在地磁活動寧靜期大得很多,且在地理位置的分布上也較為寬廣,且常偏離磁赤道甚遠。這些重離子除了可能是上升的電漿泡外,也可能是由高緯度極光區所產生的重離子擾動傳播到低緯度區。進一步分析高解析度(1024Hz)的離子密度及速度變化,我們發現重離子含量異常區的波譜特性有別於離子成分含百分百O+的電離層區。隨著NO+及O+比值的增加,在波長(100公尺到10公尺)範圍的功譜密度(P)隨波數(k)的變化不再遵循 的關係式。離子成份如何影響電漿的不規則體結構,雖然不在本篇論文裡探討,卻是另一個值得更深入研究的課題。摘要(英) Abstract
Data from the IPEI payload onboard ROCSAT-1 are used to study the phenomena of the anomalous increase of heavy ions (mainly NO+) in the topside ionosphere for the solar maximum period of Year 2000. We separated the distribution of heavy ions into two different types. One type is that the heavy ions were observed in the O+ depleted region near the dip equator during the geomagnetic quiet time. Such heavy ions are part of the fast rising bubbles that originated from the bottomside ionosphere. The other type is the heavy ions observed during the great magnetic storms. The storm-time NO+ structures are widely distributed and far away from the dip equator. These topside ions may also be associated with bubbles. The other possibility is that these ions were generated in the auroral zone and were driven toward the lower latitudes by the combined effects of the disturbance electric fields produced during the great storm as well as the inter-hemispheric neutral wind. Furthermore, we examined the 1024 Hz high-resolution ion density and velocity spectral. We found that as the ratio NO+/ O+ increases, the power spectral density (P) did not vary with wave number (k) in the form of in the transitional scale range. Though we did not discuss how the ion composition changes affect the plasma irregularity structures in this thesis. It is, however, an interesting subject to be further studied.關鍵字(中) ★ 重離子含量異常
★ 頂部電離層
★ 中華衛星一號關鍵字(英) ★ anomalous concentration of molecular ions
★ topside ionosphere
★ ROCSAT-1論文目次 摘要 a
英文摘要 b
致謝 c
目錄 d
圖目錄 f
表目錄 i
第一章 緒論 1
1-1 歷史回顧-電離層簡介 1
1-2 研究目的 3
第二章 儀器介紹 6
2-1中華衛星一號簡介 6
2-2 電離層電漿及電動效應儀 7
2-3 阻滯電位分析儀 12
第三章 阻滯電位分析儀的觀測原理 15
3-1 一維離子流量理論 15
3-2 阻滯電位分析儀之I-V曲線 20
3-3 頂部電離層之重離子 22
第四章 阻滯電位分析儀資料的處理程序與分析方法 29
4-1 資料處理程序 29
4-2 頻譜資料分析 31
第五章 重離子觀測的分析討論 34
5-1 在地磁活動寧靜期間 34
5-1-1 重離子含量異常的空間分布情形 34
5-1-2 隨季節與地方時間的變化 41
5-2 在地球磁暴發生期 43
5-2-1 重離子含量異常的空間分布情形 43
5-2-2 隨季節與地方時間的變化 48
5-3 功譜密度分析 49
第六章 結論 55
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趙吉光,阻滯電位分析儀之數值模擬,博士論文,國立中央大學,
2000。
何旭慧,中華衛星一號觀測電離層電漿氣泡密度變化之統計及研究,碩士論文,國立中央大學,2001。指導教授 葉惠卿(Huey-Ching Yeh) 審核日期 2003-7-16 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare