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米 澤 千 夏*・ 竹 内 章 司** Chinatsu YONEZAWA and Shoji TAKEUCHI Abstract : Baseline distance of interferometric ERS-1/SAR data pair was estimated by orbital fringe pattern on the initial interferogram and digital elevation model without using ground control points and orbital information. The temporal changing pattern of baseline distance was simulated based on the assumption that orbital fringe patterns were divided into two patterns, one from parallel component of baseline distance and the other from perpendicular component of it. The interferogram of eastern Saitama prefecture, in which orbital and topographic fringes were removed, indicated local phase difference change patterns. Most of them corresponded to fine leveling results. This study suggested that land subsidence detection on urban area is possible by C-band SAR interferometry.

A practical method of baseline estimation and its application for detecting land subsidence by ERS-1/SAR interferometry.