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研究生： 陳汶炫
Chen, Wen-Shiuan
論文名稱： 太陽風之電場與中磁緯度電離層全電子含量之相關性研究
A Correlation Study on Solar Wind Electric Fields and Middle Magnetic Latitude Ionospheric Total Electron Content
指導教授： 談永頤
Tam, Sunny W.Y.
學位類別： 碩士
Master
系所名稱： 理學院 - 太空天文與電漿科學研究所
Institute of Space, Astrophysical and Plasma Sciences(ISAPS)
論文出版年： 2011
畢業學年度： 99
語文別： 英文
論文頁數： 89
中文關鍵詞： 太陽風之電場 、電離層全電子含量
外文關鍵詞： Solar Wind Electric Field, Ionospheric Total Electron Content
相關次數： 點閱：107  下載：5 
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    • 太陽風之場量例如星際磁場(IMF)和太陽風的速度會影響到電離層的電漿特性。本篇研究結合了WIND太空船所觀測到的太陽風之磁場，離子速度和離子密度以及福衛三號之掩星觀測儀所觀測的電離層電子密度。我們使用2008年八月至十月由此兩任務所測得之資料，檢視太陽風之電場與電離層的全電子含量(TEC)之可能的相關性。假設E∝Δ(-V×B)以及E∝-V×B，經由比較不同情況下之相關係數，我們檢視電離層的感應電場對中磁緯度全電子含量之影響。我們的研究結果顯示在E∝-V×B的假設下，會與電離層內由太陽風所造成的感應電場較有相關性。當南向星際磁場以及持續長時間的南向星際磁場，在中磁緯度午後電離層全電子含量與其有著更良好的相關性。

    The conditions of the solar wind field quantities, such as the interplanetary magnetic field (IMF) and the solar wind velocity, may affect the plasma properties in the ionosphere. This study combines the observations of solar wind magnetic field, ion velocity and ion density by the WIND spacecraft and the observations of ionospheric electron density by the GPS Occulation Experiment (GOX) on the satellites of the FORMOSAT-3/COSMIC (FS3C) mission. We use the data from the two missions during the period August to October 2008 to examine the possible correlation between the solar wind electric field and the total electron content (TEC) in the ionosphere. By comparing the correlation coefficients at middle magnetic latitudes under different conditions, we examine the influence on the TEC by the induced electric field in the ionosphere under the assumptions of E∝Δ(-V×B) and E∝-V×B. The results of our studies suggest that the assumption of E∝-V×B may be more relevant to the form of the ionospheric electric field induced by the solar wind. Its association with the ionospheric TEC at middle magnetic latitudes and in the early afternoon is more correlated when the IMF is southward and remains southward for longer duration of time.

    摘要 I ABSTRACT II ACKNOWLEDGMENTS III CONTENTS IV LIST OF FIGURES VII LIST OF TABLES XII 1 INTRODUCTION 1 1.1 Solar Wind 1 1.2 Ionosphere 3 1.3 Fountain effect 5 1.4 Solar Wind-Ionosphere coupling 8 1.5 Motivation and Objectives 10 1.6 Outline 11 2 INSTRUMENT AND OBSERVATION 12 2.1 GPS (Global Positioning System) 12 2.2 FORMOSAT-3 /COSMIC 13 2.3 Radio Occultation Technique 15 2.4 WIND spacecraft 24 3 DATA PROCESSING 27 3.1 Data Processing of WIND data 27 3.1.1 Introduction to WIND data 27 3.1.2 Filtering and interpolation of WIND data 27 3.1.3 Definitions of tnow, -V×B and Δ(-V×B) 29 3.2 Data Processing of FS3C data 31 3.2.1 Introduction to FS3C data 31 3.2.2 Filtering, calculating and grouping of FS3C data 31 3.3 Interpolation of WIND data and FS3C data 33 3.4 Definition of Correlation Coefficient 34 4 OBSERVATION AND DISCUSSION 38 4.1 Data Selection 38 4.2 Comparison of Correlation Coefficients 43 4.2.1 Comparison of all, positive and negative -V×B 43 4.2.2 Comparison of all, positive and negative Δ(-V×B) 48 4.2.3 Comparison of all, increased and decreased -V×B 51 4.2.4 Comparison of all, increased and decreased Δ(-V×B) 54 4.3 Comparison of Correlation Coefficients with Timing Consideration 57 4.3.1 Consideration of -V×B after a Positive Minimum 57 4.3.2 Comparison of Average -V×B 62 4.3.3 Comparison of Average Δ(-V×B) 65 4.3.4 Comparison of Average -V×B after a Negative value 68 4.4 Discussion 72 5 CONCLUSIONS 81 5.1 Concluding Remarks 81 5.2 Future Work 82 APPENDIX 83 REFERENCES 86

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    蔡龍治、蕭棟元、陳政儀、蔡偉雄、朱延祥、劉兆漢，福衛三號於全
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    http://www.astrobio.net/
    http://tacc.cwb.gov.tw
    http://www.nspo.org.tw
    http://spdf.gsfc.nasa.gov/
    http://www.boqueteweather.com/links.htm

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