New and potential technology for observation of earth from space : synthetic aperture radar interferometry

G.X. Liu, Xiaoli Ding, Y.Q. Chen, Zhilin Li, D.W. Zheng

Research output: Journal article publicationJournal articleAcademic research


“合成孔徑雷達干涉 (In SAR)”是近十年發展起來的空間對地觀測遙感新技術。它具有從覆蓋同一地區的星載 (或機載 )合成孔徑雷達復數圖像對提取干涉相位圖 ,借助于雷達成像時的姿態數據重建地表三維模型 (即數字高程模型 )的巨大潛力。尤其是基于多幅雷達復數圖像處理的差分干涉技術 (D- In SAR)可以用于監測地表形變 ,精度可達厘米級甚至更高 ,其監測空間分辨率是前所未有的。介紹了 In SAR和 D- In SAR的基本原理 ,對影響干涉結果的一些重要因素做了分析 ,重點回顧和展望了差分干涉技術在與地表形變有關的地震監測和震后形變測量、地面下沉和山體滑坡、火山運動監測等方面應用的現狀和前景。||Synthetic Aperture Radar Interferometry (InSAR) is a new and potential technology that has been developed in the last decade or so for observation of the Earth. It can be used to generate large area (even global) DEM or to detect Earth surface deformation by means of interferometric phase data and attitude data of the radar platform. In particular, Differential InSAR (D InSAR) has been demonstrated to have unprecedented ability to measure and monitor Earth surface change with excellent characteristics of continuous spatial coverage and nearly automatic processing and high accuracy (up to cm level or even better). This paper first introduces the basic principles of InSAR and D InSAR, and summarizes the involved key processing algorithms of interferometric technology, including SAR images coregistration, phase unwrapping and baseline estimation etc. Then, some factors, that affect the quality of interferometric products, are generally analyzed, i.e., phase quality and baseline parameters play very important roles on interferometric processes. Finally, emphasis is placed on reviewing D InSAR applications in measuring and monitoring Earth surface deformations caused by earthquakes, post seismic displacements, ground subsidence, landslides and volcanic movements.
Original languageChinese (Simplified)
Pages (from-to)734-740
Number of pages7
Journal地球科學進展 (Advance in earth sciences)
Issue number6
Publication statusPublished - 2000


  • SAR interferometry
  • Differential InSAR
  • Digital elevation model
  • Earth surface deformat0

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