中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/44386
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 80990/80990 (100%)
Visitors : 41658960      Online Users : 1809
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/44386


    Title: 利用福爾摩沙衛星三號觀察太陽活動極小期間之閃爍指數變化;A Study of FORMOSAT-3/COSMIC S4 Index During Solar Minimum
    Authors: 陳世平;Shih-ping Chen
    Contributors: 太空科學研究所
    Keywords: 福爾摩沙衛星三號;閃爍指數;太陽活動極小期;Formosat3/COSMIC;s4
    Date: 2010-07-22
    Issue Date: 2010-12-09 10:50:30 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 電離層中因為電子不均勻分布,當電波穿過電離層中的不規則體時會受到干擾,稱為電離層閃爍現象。於2006 年運行至今的福爾摩沙衛星三號計畫,藉由接收全球32座GPS 衛星訊號進行掩星觀測分析而得到大氣中物理參數之垂直分布。使用福衛三號的空載GPS 接收機讓使用者得以觀察全球閃爍指數變化,以進一步研究閃爍現象甚至合理推測其成因。本論文藉福爾摩沙衛星三號在2007~2009 年太陽活動極小期間所收集之電離層閃爍指數(S4-index)資料,對閃爍現象之三維空間與時間分布進行討論,並將福爾摩沙衛星三號於電離層F 層高度閃爍指數資料與國際參考電離層(International Referance Ionosphere, IRI)模式之散狀F 層發生機率對照,討論F層閃爍指數與不規則體發生機率的關係。由福衛三號之資料發現在電離層E、F 層高度的閃爍指數資料具有不同的日與季節變化。夏半球E 層閃爍指數北半球大於南半球,秋半球E 層閃爍指數也較春半球強。利用地磁指數(Kp-index)將閃爍指數資料分類,也發現較強的地磁活動對於電離層閃爍具有壓制作用。福衛三號的全球閃爍指數具有明顯的經度效應,國際參考電離層可將福衛三號三維閃爍指數觀測列入參考,以建立完整之閃爍模式。Since the Satellite was launched at April 15 ,2006. FORMOSAT 3/COSMIC started offering atmoshperic and ionospheric vertical profile data by analying GPS L1-band signal. Due to the extensive data coverage, users are finally able to working on global ionospheric variation research. This research is using COSMIC scintillation index data in year 2007~2009 by comparing the COSMIC scintillation data in F-region with International Referance Ionosphere(IRI) model spread-F occurrence rate. COSMIC scintillation data in E and F region of ionosphere has different diurnal and seasonal variation. The scintillation index in summer northen hemisphere is larger then the index value in summer southern hemisphere, and it’s larger in autumn hemisphere than in spring hemisphere. We also find out scintillation index shows suppression when strong geomagnetic activity.
    Appears in Collections:[Graduate Institute of Space Science] Department of Earth Sciences

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML834View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明