本項成果蒐集自2019年至2023年全臺灣共146張之Sentinel-1影像，雷達衛星影像根據永久散射體雷達差分干涉標準流程進行處理，最後得到Sentinel-1之全臺灣多時期形變監測成果，該觀測成果為雷達衛星視角方向，為了獲取垂直方向形變量，全臺灣永久散射體雷達差分干涉成果會利用衛星導航系統資料輔助推算，並將垂直方向PSInSAR點資料轉為網格資料進行儲存，完成五年期間之全臺灣PSInSAR相對形變速率觀測成果。成果可見自2019年至2023年五年期間全臺灣地表形變狀況，其中以雲林地區之地層下陷、2022年花蓮光復地震、臺東關山地震產生的地形變狀況最為顯著，雲林地區之地層下陷速率測得每年下陷約5公分，而花東地震事件發生當下產生約15公分的地表形變，但由於觀測期間為五年，因而最後以呈現為約每年50 ~ 60 mm之形變速度，於形變解釋時需要特別小心。

This work collects images from Sentinel-1 acquired from 2019 to 2023 and processes the data using the standard procedure of PSInSAR. The result of the multi-temporal line of sight displacement covering the Taiwan area is obtained. The Global Navigation Satellite System (GNSS) data is involved to derive more obvious deformations in the vertical direction. Finally, the product, including 5 years displacement, is stored in raster format and delivered. As a result, the land subsidence in the Yunlin area and the fault motion caused by the earthquake in the Hualien and Taitung area are observed. The mean velocity of displacement in the vertical direction in the Yunlin area is about 5 cm per year. However, the description of the mean velocity should be very careful because the displacements in the Hualien area were caused by the uplift of about 15cm and happened in a very short time.