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研究生:吳笙緯
研究生(外文):Wu, Sheng-Wei
論文名稱:應用短基線集干涉技術探討六龜地區地表形變
論文名稱(外文):Geomorphic Change in Liugui with ALOS PALSAR by SBAS
指導教授:林玉儂史天元史天元引用關係
指導教授(外文):Lin, Yu-NungShih, Tian-Yuan
口試委員:廖志中林玉儂張智安史天元
口試委員(外文):Liao, Jyh-JongLin, Yu-NungTeo, Tee-AnnShih, Tian-Yuan
口試日期:2019-07-26
學位類別:碩士
校院名稱:國立交通大學
系所名稱:土木工程系所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2019
畢業學年度:108
語文別:中文
論文頁數:77
中文關鍵詞:短基線集干涉雷達干涉技術崩塌
外文關鍵詞:SBASInSARLandslide
相關次數:
  • 被引用被引用:2
  • 點閱點閱:234
  • 評分評分:
  • 下載下載:40
  • 收藏至我的研究室書目清單書目收藏:0
本研究利用2007年至2011年共18幅的ALOS PALSAR影像,以SBAS方法分析六龜地區的地表形變。在干涉圖產製的部份,利用ISCE程式對影像進行前處理與DInSAR之處理,並挑選時間基線小於1000日、空間基線小於1500公尺之干涉圖,利用GIAnT程式改正誤差,由於研究區位於熱帶氣候的山區,水蒸氣變化大,而ECMWF對水蒸氣的變化並不靈敏,因此對於大氣誤差,使用地形改正之;對於相位傾斜,利用4參數法對單張干涉圖獨立改正之。將改正完的干涉圖利用GIAnT提供的SBAS方法得到地表變形時間序列。
利用SBAS方法得到的地表變形時間序列,可發現六龜地區有一侵蝕堆積作用,在所選測區可觀察到,抬升下陷的速率都約20公分/年;在PSInSAR之地表變形時間序列也發現同樣模式。另外,選擇一固定範圍比較兩種方法之觀測數,相對於PSInSAR只有743個觀測數,SBAS共有5405個觀測量,足見SBAS方法可獲得較PSInSAR方法多的觀測數。而在相位解開的地表形變量中發現仍受相位傾斜所影響,推測可能是干涉圖的基線過長或改正模型參數不足,未來可嘗試7參數法改正之。
In this study, a total of 18 ALOS PALSAR images from 2007 to 2011 were used to analyze the surface deformation of the Liugui area by the SBAS method. In the part of the interferogram production, ISCE is used to pre-process the image with DInSAR technology. The interferograms with temporal baseline less than 1000 days and spatial baseline less than 1500 meters are selected as the inputs to GIAnT for time-series analysis. In the mountainous areas of the tropical climate, the water vapor changes greatly, and the ECMWF model is not sensitive enough to the change of water vapor. Therefore, for the tropospheric error, the topographically-correlated correction is used; for the phase ramp, the interferogram is corrected by the 4-parameter method independently. After correction, we used the SBAS method provided by GIAnT to obtain the surface deformation time series.
The surface deformation time series obtained by the SBAS method reveals a sediment erosion-accumulation event in the Liugui area, at the rate of 20 cm/year in both the line-of-sight decrease and increase direction. The same pattern is also found in the surface deformation time series of PSInSAR. In addition, within our selected area, there are only 743 PSInSAR observations but 5405 SBAS observations. This comparison means that the SBAS method can obtain more observations than the PSInSAR method. In our result, the deformation had an error caused by phase ramp. It is speculated that the baseline of the interferogram is too long or the number of model parameters are insufficient. In the future, the 7-parameter method can be tried to improve the phase ramp removal.
摘要 I
Abstract II
誌 謝 III
目 錄 IV
圖 目 錄 V
表 目 錄 VII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 文獻回顧 1
1.3 論文大綱 3
第二章 雷達干涉技術 4
2.1 合成孔徑雷達 4
2.2 合成孔徑雷達干涉 7
2.3 差分合成孔徑雷達干涉 9
2.4 永久散射體方法 14
2.5 短基線集方法 16
2.6 常用衛星與使用影像 17
第三章 研究區域 21
3.1 六龜現況 21
3.2 地質概述 22
第四章 研究方法 24
4.1 研究資料與流程 24
4.2 ISCE 25
4.3 GIAnT 26
4.4 StaMPS 28
第五章 研究成果與討論 29
5.1 DInSAR成果 29
5.2 誤差改正 31
5.2.1 大氣改正 31
5.2.2 相位傾斜改正 39
5.3 SBAS方法 44
5.4 與PSInSAR成果比較 51
5.5 小結 57
第六章 結論與建議 59
參考文獻 60
附錄 64
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