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Student Number 93623014
Author Chia-Chen Kuo(郭家禎)
Author's Email Address kuo271128@hotmail.com
Statistics This thesis had been viewed 1463 times. Download 671 times.
Department Graduate Institute of Space Science
Year 2005
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The analysis of fof2 numerical mapping between GPS/MET and IRI model
Date of Defense 2006-07-15
Page Count 96
Keyword
  • GPS/MET fof2 numerical mapping
  • Abstract Radio occultation technique of the Global Positioning System(GPS) has been applied to obtain vertical profile of electron density in the Ionosphere. Global Position System/Meteorology (GPS/MET) uses a satellite in low Earth orbit(LEO) to receive the phase signals of GPS radio wave affected by ionosphere while propagating through it. By using Abel integral transform under the assumption of spherical symmetry, we caculated more than forty thousands of vertical profiles of the ionospheric electron density from April 1995 to Feb 1997. And the retrieved foF2 values have been used to produce numerical maps. In this study, we choose our coordinate functions as a particular set of the functions  which are linear combinations of surface spherical harmonics and are divided into three groups according to different orders from 0 to2. And the derived numerical maps will be compared with the original IRI maps.
    Table of Content 摘要 .......................................................................................... Ι
    英文摘要 ................................................................................... Ⅱ
    致謝 …………………………………………………………..…..… Ⅲ
    圖目錄 ....................................................................................... Ⅳ
    表目錄 ....................................................................................... Ⅳ
    第一章 序論 .............................................................................. 1
    1-1 前言 ................................................................................ 1
    1-2 電離層結構簡介 .............................................................. 3
    第二章 IRI Model ..................................................................... 6
    2-1 IRI 模式發展與簡介 ........................................................ 6
    2-2 IRI 模式中垂直電子密度分佈模式 .................................. 7
    2-3 IRI for foF2 maps .......................................................... 12
    2-4 foF2 maps .................................................................... 13
       2-4-1 日變化分析 ......................................................... 14
       2-4-2 當地時間之修正 .................................................. 15
       2-4-3 日變化分析雜訊過濾 ........................................... 16
       2-4-4 正交函數集之建構 .............................................. 19
       2-4-5 地理變化分析 ..................................................... 21
       2-4-6 地理變化分析雜訊過濾 ....................................... 22
    第三章 電波遮蔽觀測分析方法 ............................................... 28
    3-1 GPS/MET 系統與電波遮蔽觀測 ................................... 28
    3-2 Abel 積分轉換 .............................................................. 34
    3-3 電子濃度與折射係數之關係 .......................................... 35
    3-4 全電子含量反演電子濃度 .............................................. 36
    3-5 GPS/MET 解析度比較 ................................................. 39
    3-6 GPS/MET 資料分佈情形 .............................................. 40
    第四章 利用GPS/MET資料作foF2數值映射 ........................ 43
    4-1 球諧波分析法 ................................................................ 43
    4-2 最佳雜訊分離  .............................................................. 50
    第五章 GPS/MET 與 IRI 模式之foF2數值映射資料比較 ...... 55
    5-1 foF2 之比較 ................................................................. 55
    5-3 foF2 數值映射之比較 ................................................... 55
    第六章 結論與未來展望 .......................................................... 67
    參考文獻 ................................................................................... 69
    附錄A IRI 程式介紹 …………………………………………….. 72
    附錄B 電離層電子密度部份之計算……………………… 78
    附錄C IRI 程式中foF2 之計算 ……………………………… 82
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    Advisor
  • Lung-Chih Tsai(蔡龍治)
  • Files
  • 93623014.pdf
  • approve immediately
    Date of Submission 2006-07-24

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