合成孔徑雷達差分干涉測量法利用雷達回波的相位資訊來偵測地表，是一項精準有效的地殼變形測量方法。這項方法具有許多優點，例如它不必到達實地即可施測、受雨霧影響較小、具全天候資料收集之能力、且能快速提供大範圍的地表資訊。中央大學太遙中心接收站自1993 年10 月開始接收人造衛星雷達影像資料。就研究地殼變形而言，目前台灣地區的雷達影像資料量已相當充足。本計畫將針對台灣地區，以歐洲太空總署發射之ERS-1 及ERS-2 衛星所擷取之雷達影像為主要資料來源，配合其他衛星影像為輔助，篩選出衛星軌道基線差較小的影像配對，進行影像差分干涉合成處理。計畫預計為期三年，本年度為計畫執行第二年，主要測量工作將涵蓋台灣西部平原，包括苗栗、台中、彰化、雲林、嘉義、台南、高雄等地區。本計畫預期可提供台灣西部平原地區雷達影像、同調性影像、差分干涉圖像、及地表位移圖（各預計30 幅），增進了解受測區域的活動變形分布、變形方式、速率與再現頻率，作為地質災害潛勢與危害度分析之依據。測量資料並可與其他大地測量資料（如GPS 測量及精密水準測量）互補，提供更完整之地表變形資訊。 Radar interferometry is a technique for extracting surface information of the Earth by using the phase content of the radar signal as an additional information source derived from the complex radar data. The use of DInSAR (Differential interferometric SAR) for monitoring earth deformation process has received considerable attention because of its great potential for mapping the movement associated with large earthquakes. In Taiwan, the Center for Space and Remote Sensing Research (CSRSR), National Central University has established its ground station in 1993 and then began to try to use SAR images acquired from European Space Agency (ESA) European Remote Sensing 1 and 2 (ERS1 and ERS2) satellite in detecting crustal deformation of Taiwan. Up to now, the SAR images for the Taiwan region have got a considerable collection. This project aims at applying the DInSAR technique to determine the crustal deformation of the Taiwan area. The SAR images used in this study are principally acquired by the satellites ERS1 and ERS2. The time to go through this project is taken into account as three years. This year is the second year for this project; our main target will be focused on the western plain area of Taiwan, including the Miaoli, Taichung, Changhua, Yunling, Chiayi, Tainan, and Kaohsiung areas. It is anticipated to process at least 30 interferograms in this year. Our observation based on DInSAR in this area could improve our knowledge on styles and amount of the crustal deformation. This knowledge could greatly help lessen the impact of natural hazard. 研究期間：9401 ~ 9412
