- 作者: 曾裕強
- 作者服務機構: 聯合工商專科學校電子科
- 中文摘要: 近年來,合成口徑雷達干涉技術已被廣泛地應用在數值地圖之製作及地表覆蓋物之變遷偵測等方面。此一技術是利用在幾何上有些許差異的兩接收器對同一地區所取得的兩張合成口徑雷達影像間相對的相位差來求得地表高度。由於台灣地形起伏相當大且其空間去相關性及時間去相關性太高,致使吾人很難將合成口徑雷達干涉技術應用於此一地區所取得的影像。故需要有合成口徑雷達干涉技術之模擬器。本文即利用合成口徑雷達干涉技術及球形地球模式製作完成此一模擬器,並由不同干涉參數的組合得到一組模擬ERS-1合成口徑雷達干涉系統的干涉圖。實驗結果顯示,此模擬器確實為了解合成口徑雷達干涉技術之各項參數的特性及驗證合成口徑雷達干涉技術之處理程序的發展提供了一個方便又有效的工具。
- 英文摘要: In recent years, SAR (Synthetic Aperture Radar) Interferometry (also known as InSAR) hasbeen widely applied to DTM (Digital Terrain Model) generation and land-cover change detection.The relative phase difference between two SAR images of the same scene acquired from slightlydifferent geometries is used to derive the surface height. Because the terrain slope is large andspatial decorrelation and temporal decorrelation are considerably high in Taiwan, it is very difficultto apply SAR interferometric techniques to images acquired in this area. Therefore, an SAR inter-ferometry simulator is required. Based on the interferometric techniques and spherical Earth model,in this paper, we demonstrate the implementation of a SAR interferometry simulator. A set of interferogramimages which simulate the ERS-1 (first Earth Remote Sensing Satellite) SAR interferometric systemwere generated for different interferometric parameters combinations. The experimental results indicatethat the simulator is an effective and efficient tool for understanding the characteristics of the InSARparameters and for verification of the development of the InSAR procedures, thus, greatly enhancing thecapability of InSAR.
- 中文關鍵字: SAR interferometry; spatial decorrelation; temporal decorrelation; baseline; spherical earth model
- 英文關鍵字: --