English  |  正體中文  |  简体中文  |  Post-Print筆數 : 27 |  全文笔数/总笔数 : 113311/144292 (79%)
造访人次 : 50921515      在线人数 : 873
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻


    请使用永久网址来引用或连结此文件: https://nccur.lib.nccu.edu.tw/handle/140.119/121237


    题名: 利用偏移偵測法監測格陵蘭Russell冰河之位移
    Tracking Greenland Russell Glacier Movements Using Pixel-offset Method
    作者: Tsai, Ya-Lun
    林士淵
    Lin, Shih-Yuan
    Kim, Jung-Rack
    贡献者: 地政系
    关键词: Pixel-offset;Greenland Ice Sheet;Synthetic Aperture Radar
    偏移偵測法;格陵蘭冰層;合成孔徑雷達
    日期: 2018-09
    上传时间: 2018-12-06 15:35:08 (UTC+8)
    摘要: Global warming has been a worldwide issue and significantly increasing icecap melting rate over polar area. Consequently the sea level rises continuously and poses a fundamental threat to whole human beings. Since the mass loss of Greenland ice sheet (GrIS) is highly correlated to the velocity of glacier movement, this study aims to monitor the impact of global warming by tracking glacier terminus displacement over GrIS using spaceborne remote sensing techniques which are widely applied in cryosphere monitoring for its continuous and efficient data collection ability. However, as many techniques are limited by the rapid changing and instable landscape dynamics of glacier surface, the present study utilizes the pixel-offset (PO) method with optical and synthetic aperture radar (SAR) images to track glacier deformation. In addition, by comparing the combinations of different quality images, processing parameters and pre-processing methods, we found the pan channel of Landsat-8 images and the log-processed HH polarization SAR images show the most promising results.
    近年全球暖化現象日益嚴重，格陵蘭等極區融冰所造成之海平面上升將對全球人類帶來嚴重威脅。 因冰層質量之改變與冰河移動速度高度相關，故可藉由監測格陵蘭冰層(Greenland Ice Sheet, GrIS)上冰河 之移動推估全球暖化對其造成之影響。衛星影像因具有連續且快速獲得大範圍地表資訊之能力，故已廣 泛應用於廣域冰河之監測；然各項技術受限於快速移動且地貌不穩定之冰河表面而有諸多限制，故本研 究使用偏移偵測法(Pixel-offset, PO)以衛載光學及合成孔徑雷達(Synthetic Aperture Radar, SAR)影像獲得冰 河表面之位移向量。經比較不同影像品質、處理參數等調整對於變動偵測成果之影響後，本研究發現目 前免費衛載光學影像以 Landsat-8 的全色態波段有最佳成果，而 SAR 影像以經 Log 處理之 HH 偏極影像 為最優。
    關聯: 航測及遙測學刊, Vol.23, No.3, pp.173-189
    数据类型: article
    DOI 連結: http://dx.doi.org/10.6574/JPRS.201809_23(3).0003
    DOI: 10.6574/JPRS.201809_23(3).0003
    显示于类别:[地政學系] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    173-189.pdf12538KbAdobe PDF2379检视/开启


    在政大典藏中所有的数据项都受到原著作权保护.


    社群 sharing

    著作權政策宣告 Copyright Announcement
    1.本網站之數位內容為國立政治大學所收錄之機構典藏，無償提供學術研究與公眾教育等公益性使用，惟仍請適度，合理使用本網站之內容，以尊重著作權人之權益。商業上之利用，則請先取得著作權人之授權。
    The digital content of this website is part of National Chengchi University Institutional Repository. It provides free access to academic research and public education for non-commercial use. Please utilize it in a proper and reasonable manner and respect the rights of copyright owners. For commercial use, please obtain authorization from the copyright owner in advance.

    2.本網站之製作，已盡力防止侵害著作權人之權益，如仍發現本網站之數位內容有侵害著作權人權益情事者，請權利人通知本網站維護人員(nccur@nccu.edu.tw)，維護人員將立即採取移除該數位著作等補救措施。
    NCCU Institutional Repository is made to protect the interests of copyright owners. If you believe that any material on the website infringes copyright, please contact our staff(nccur@nccu.edu.tw). We will remove the work from the repository and investigate your claim.
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈