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

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姓名

何旭慧(Xu-Huan He ) 查詢紙本館藏

畢業系所

太空科學研究所

論文名稱

中華衛星一號觀測電離層電漿氣泡密度變化之統計及研究

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摘要(中)

利用中華衛星一號上之電離層電漿電動效應酬載儀（IPEI）所量測到高解析度的密度資料，統計分析bubbles的發生機率隨季節、地理位置及地磁擾動的變化情形。當地磁擾動小時，在傍晚20點為bubbles發生的最佳時機，而在地磁擾動大時，午夜之後較容易有bubbles的發生。由2000年一整年的資料看出bubbles最容易在地理經度0度附近發生，而夏天時在太平洋地區（地理經度120度到150度）、冬天時在南美洲（地理經度-60度到-30度，偏向南半球）最容易產生bubbles。此外，地磁擾動小的狀況下，在當地時間18點到20點，不同尺度的波譜指數會隨著時間改變。而在地磁擾動大的狀況下，波譜指數在當地時間凌晨3點到6點有明顯的變化。

摘要(英)

Gathered during the year 2000 from 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. 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 all year long. The seasonal occurrence is such that it is high in the pacific regions (between 120 and 150 longitude) during northern summer and in the south of America (between -60 - -30 longitude) during northern winter. The result of the spectra analysis for the ESF events, indicate that the spectral index in three scales ranges changes as function as local time during 1800-2000 LT under the condition Kp 3+, and during 0300-0600 LT in the strong geomagnetic activities (Kp 4-).

關鍵字(中)

★ 中華衛星一號
★ 電離層電漿電動效應酬載儀

關鍵字(英)

★ bubbles
★ IPEI

論文目次

第一章緒論1
1.1 電離層簡介1
1.2 赤道F層擴散現象（ESF）之簡介2
1.3 研究動機12
第二章儀器簡介13
2.1 中華衛星一號簡介13
2.2 電離層電漿電動效應儀16
2.3 離子捕獲儀（Ion Trap）19
第三章觀測資料的處理與分析22
3.1 資料的處理22
3.1.1 開啟快速模式的分佈23
3.1.2 資料的挑選25
3.2 資料分析26
第四章觀測結果與討論30
4.1 地磁活動對bubbles分佈的影響30
4.1.1 地磁活動與bubbles發生地點（當地時間）之關係30
4.1.2 地磁活動與bubbles分佈在地理經度的關係32
4.2 季節對bubbles分佈的影響33
4.3 波譜指數36
4.3.1 波譜指數隨當地時間的變化37
4.3.2 Bubbles的擾動強度對波譜指數的影響41
4.3.3 Transitional scale的消失44
第五章總結48
參考文獻53

參考文獻

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指導教授

蘇信一(Shin-Yi Su)

審核日期

2001-6-29

推文