InSAR双轨差分法原理及应用
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摘要
提出了一种利用解缠后的相位信息或相位梯度信息确定形变区域的InSAR形变检测新方法——双轨差分法,阐述了检测原理,设计了检测流程。实验结果表明,双轨差分法能检测形变区域。经比较分析得出,利用解缠后的相位信息能确定形变区域位置和形变量,检测灵敏度较低;利用相位梯度信息仅能确定形变区域位置,检测灵敏度较高。
A deformation detection method of interferometric synthetic aperture radar system which is called two tracks differential method was proposed.Unwrapped phase or phase gradient information to confirm deformation area were used in the proposed method.Detection Principle was described and detection flow was designed.Experiment results indicate that two track differential methods could detect deformation area.Comparative analysis shows that it has low sensitivity when unwrapped phase information is used to detect position and size of deformation area;and it has high sensitivity when phase gradient information is used to detect the position of deformation area only.
A deformation detection method of interferometric synthetic aperture radar system which is called two tracks differential method was proposed.Unwrapped phase or phase gradient information to confirm deformation area were used in the proposed method.Detection Principle was described and detection flow was designed.Experiment results indicate that two track differential methods could detect deformation area.Comparative analysis shows that it has low sensitivity when unwrapped phase information is used to detect position and size of deformation area;and it has high sensitivity when phase gradient information is used to detect the position of deformation area only.
引文
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[2]李志伟,朱建军,王仁谦,等.非线性模型的非线性强度及其在变形分析中的应用[J].中南工业大学学报:自然科学版,2001,32(4):390-394.Li Zhi-wei,Zhu Jian-jun,Wang Ren-qian,et al.Re-search on nonlinear strength of nonlinear model and itsapplication in deformation analysis[J].Journal of Cen-tral South University of Technology,2001,32(4):390-394.
[3]李平湘,杨杰.雷达干涉测量原理与应用[M].北京:测绘出版社,2006:115-117.
[4]吴涛.星载合成孔径雷达图像模拟研究[D].北京:中国科学院研究生院,2005.Wu Tao.Research on simulation of spaceborne syntheticaperture radar image[D].Beijing:Graduate School,Chinese Academy of Sciences,2005.
[5]Massonnet D,Rossi M,Carmona C,et al.The displace-ment field of the landers earthquake mapped by radarinterferometry[J].Nature,1993,364:138-142.
[6]Zebker H A,Rosen P A,Goldstein R M,et al.On thederivation of coseismic displacement fields using differ-ential radar interferometry:the landers earthquake[J].Journal of Geophysical Research,1994,99(B10):19617-19634.
[7]王艳.利用相干目标分析方法的长时间地表形变研究[D].武汉:武汉大学,2006.Wang Yan.Research on long time surface deformationusing coherent targets analysis method[D].Wuhan:WuHan University,2006.
[8]李新武,郭华东,刘浩,等.干涉雷达在获取地震同震位移场中的应用[J].地震,2002,22(2):47-52.Li Xin-wu,Guo Hua-dong,Liu Hao,et al.Application ofinterferometric SAR for extracting earthquake co-seismicdisplacement field[J].Earthquake,2002,22(2):47-52.
[9]单新建,马瑾,王长林,等.利用差分干涉雷达测量技术(D-InSAR)提取同震形变场[J].地震学报,2002,24(4):413-420.Shan Xin-jian,Ma Jin,Wang Chang-lin,et al.Extractingco-seismic deformation of the 1997 mani earthquakewith differential interferometric SAR[J].ACTA Seis-mologica Sinica,2002,24(4):413-420.
[10]李震,李新武,刘永智,等.差分干涉SAR冻土形变检测方法研究[J].冰川冻土,2004,26(4):389-396.Li Zhen,Li Xin-wu,Liu Yong-zhi,et al.Detecting thedisplacement field of thaw settlement by means of SARinterferometry[J].Journal of Glaciology and Geocryolo-gy,2004,26(4):389-396.
[11]程三友,刘少峰,申旭辉.差分干涉雷达测量在地面沉降中的应用研究[J].东华理工学院学报,2004,27(4):355-360.Cheng San-you,Liu Shao-feng,Shen Xu-hui.Applica-tion study of differential interferometry synthetic aper-ture radar on surface subsidence[J].Journal of EastChina Institute of Technology,2004,27(4):355-360.
[12]陶秋香,刘国林,马飞虎,等.双轨道差分干涉测量技术在地面沉降监测中的应用[J].测绘信息与工程,2008,33(4):1-3.Tao Qiu-xiang,Liu Guo-lin,Ma Fei-hu,et al.Applica-tion of two pass differential interferometry in monitoringthe land subsidence[J].Information and Journal ofGeomatics,2008,33(4):1-3.
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