Long-term Ground Deformation Measurement by Time Series Analysis for SAR Interferometry
Long-term Ground Deformation Measurement by Time Series Analysis for SAR Interferometry
复制标题
SAR 干涉测量的时间序列分析长期地面变形测量
DOI：
10.11440/rssj.29.418
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发表时间：
2009
影响因子：
--
通讯作者：
J. Matsushima
中科院分区：
文献类型：
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作者：
T. Deguchi;S. Rokugawa;J. Matsushima
干涉合成孔径雷达(InSAR)是合成孔径雷达的一种应用技术，是一种能够在大范围内高分辨率观测地表细微运动的地面位移监测方法。在这项研究中，作者提出了一种将InSAR和时间序列分析相结合来测量长期变形的方法，旨在建立实用和灵活的测量技术。它利用光滑度约束反演，将变形量作为时间序列分析的未知参数。利用ENVISAT/ASAR数据对关东平原地区的地面沉降进行了测量，并与库久库里地区的水准测量数据进行了对比，验证了该方法的准确性。结果表明，该方法检测到的局部隆起区和沉降区的空间形态与水准数据生成的形变图具有较好的相似性。此外，还表明，尽管包含了10 mm左右的偏差，但该方法的结果与水准测量数据之间的相关系数很高。
Interferometric SAR (InSAR), which is an application technique of synthetic aperture radar, is becoming established as the method for monitoring of ground displacement that can observe subtle surface movement over a wide area at high resolution. In this study, the authors developed the method to measure a long-term deformation by combining InSAR and time series analysis, aiming at establishment of practical and flexible measurement technique. It utilizes smoothness constrained inversion which assumes the amount of deformation as unknown parameter for time series analysis. The proposed method separates with ground change and noise components from each combinations of InSAR, and composes long-term deformation.We applied it to the measurement of ground subsidence around Kanto Plain with ENVISAT/ASAR data, and verified its accuracy by comparing with leveling data obtained around Kujukuri area. As a result, it was shown that the spatial shape of local uplift and subsidence areas detected by the proposed method were analogous with the deformation map generated from leveling data. In addition, it was also shown that the correlation coefficient between the result of proposed method and leveling data were high, although bias of about 10mm was included.