基于Doris的台湾集集地震同震位移场计算
|
摘要
基于公共开源软件Doris,利用三轨差分的DInSAR方法获取了1999年9月21日台湾集集地震的同震位移场。在数据处理过程中采用了一种有效的辅助解缠方法,较好地解决了利用统计费用网络流算法解缠时低相干系数像素的误差传播问题,使解缠精度得到一定改善,解缠速度显著提高。系统分析了干涉图中包含的误差,并利用GPS观测数据对轨道误差进行了改正。最终得到的斜距方向的同震位移场与GPS数据有很好的一致性。
The coseismic displacement field of the Chi-Chi ML7.6 earthquake in Taiwan island on 21 September,1999 is determined with 3-pass DInSAR method using Doris software.An effective fix is applied to the unwrapping step which improved the SNAPHU(Statistical-Cost,Network-Flow Algorithm for Phase Unwrapping)result and reduced the unwrapping time greatly.The errors in the interferogram are analyzed and the orbit error is corrected by use of GPS observations.After the correction,the displacements in the slant range direction are well consistent with the GPS data.
The coseismic displacement field of the Chi-Chi ML7.6 earthquake in Taiwan island on 21 September,1999 is determined with 3-pass DInSAR method using Doris software.An effective fix is applied to the unwrapping step which improved the SNAPHU(Statistical-Cost,Network-Flow Algorithm for Phase Unwrapping)result and reduced the unwrapping time greatly.The errors in the interferogram are analyzed and the orbit error is corrected by use of GPS observations.After the correction,the displacements in the slant range direction are well consistent with the GPS data.
引文
1Massonnet D,Rossi M,et al.The displacement field of the Landers earthquake mapped by radar interferometry[J].Na-ture1993,364:138-42.
2Zebker HA,Rosen P A,et al.On the derivation of coseis-mic displacement fields using differential radar interferome-try——the Landers earthquake[J].J.Geophys.Res.,1994,99:19617-19634.
3乔学军,郭利民.新疆伽师强震群区的InSAR观测研究[J].大地测量与地球动力学,2007,27(1):7～13.3Qiao Xuejun and Guo Limin.Study on Jiashi strong earth-quake swarm area by InSAR[J].Journal of Geodesy and Ge-odynamics,2007,27(1):7-13.(in Chinese)
4张艳梅,等.基于DInSAR的2001年昆仑山口西8.1级大地震形变探测[J]大地测量与地球动力学,2007,27(3):12～17.4Zhang Yanmei,et al.Seismic deformation detection ofMs8.1earthquake in the west to Kunlun mountain pass in2001with DInSAR[J].Journal of Geodesy and Geodynamics,2007,27(3):12-17.(in Chinese)
5Klees R and Massonnnet D.Deformation measurement using SAR interferometry:Potential and limitations[J].Geologie en,Mijnbouw,1999,77:161-176.
6B櫣rgmann R,Rosen P and Fielding E.Synthetic aperture radar interferometry to measure Earth’s surface topography and its deformation[J].A.Rev.Earth Planet.Sci.2000,28:169-209.
7吴云.台湾集集921地震地壳形变的简介与讨论[J].地壳形变与地震,2001,21(2):59～63.7Wu Yun.The crustal deformation of Chi-Chi earthquake in Taiwan[J].Crustal Deformation and Earthquake,2001,21(2):59-63.(in Chinese)
8Daocheng Sun,et al.Comparison study on the seismic de-formation of the1999Chi-Chi earthquake and Long-term strain gradient change along the Chelurgpu fault in centrol Taiwan[J].TAO,2000,11(3):738.
9Pathier E,Fruneau B,et al.Coseismic displacements of the footwall of the Chelungpu fault caused by the1999,Taiwan,Chi-Chi earthquake from InSAR and GPS data[J].Earth Planet.Sci.Lett.,2003,212:73-88.
10Chang C P and Wang C T.Application of SAR interferome-try to a large thrust deformation the1999Mw=7.6Chichi earthquake in central Taiwan[J].Geophys.J.Int,2004,159:9-16.
11Wang C T and Chen K S.Deformation field over western Taiwan island using satellite InSAR[R].IEEE,2005.
12Liu G X,Ding X L,et al.Pre-and co-seismic ground de-formations of the1999Chi-Chi,Taiwan earthquake,meas-ured with SAR interferometry[J].Computers and Geosci-ences,2004,30:333-343.
13Kampes B M and Usai S.Doris:the delft object-oriented radar interferometric software,2nd international symposium on operationalization of remote sensing[M].Enschede,The Netherlands,1999.
14Scharroo R and Visser P.Precise orbit determination and gravity field improvement for the ERS satellites[J].Jour-nal of Geophysical Research,1998,C4:8113-8127.
15Goldstein R M and Werner C L.Radar interferogram filte-ring for geophysical applications[J].geophys.Res.Lett.,1998,21:4035-4038.
16Chen C W and Zebker H A.Network approaches to two-dimensional phase unwrapping:intractability and two new algorithms[J].Journal of the Optical Society of America A,2000,17:401-414.
17Beauducel F and Biole P.Volcano wide fringes in the ERS SAR interferograms of Etna(1992-1998):Deformation or tropospheric effect?[J].Journal of Geophysical Re-search,2000,105:391-402.
18B櫣rgmann R,Ayhan M A,et al.Deformation during the12November1999,D櫣zce,Turkey Earthquake,from GPS and InSAR Data[J].Bull.Seismol.Soc.Am.,2002,92:161-171.
19Yu S B,Kuo L C,et al.Preseismic deformation and coseis-mic displacements associated with the1999Chi-Chi,Tai-wan,earthquake[J].Bulletin of the Seismological Society of America,2001,91:995-1012.
2Zebker HA,Rosen P A,et al.On the derivation of coseis-mic displacement fields using differential radar interferome-try——the Landers earthquake[J].J.Geophys.Res.,1994,99:19617-19634.
3乔学军,郭利民.新疆伽师强震群区的InSAR观测研究[J].大地测量与地球动力学,2007,27(1):7～13.3Qiao Xuejun and Guo Limin.Study on Jiashi strong earth-quake swarm area by InSAR[J].Journal of Geodesy and Ge-odynamics,2007,27(1):7-13.(in Chinese)
4张艳梅,等.基于DInSAR的2001年昆仑山口西8.1级大地震形变探测[J]大地测量与地球动力学,2007,27(3):12～17.4Zhang Yanmei,et al.Seismic deformation detection ofMs8.1earthquake in the west to Kunlun mountain pass in2001with DInSAR[J].Journal of Geodesy and Geodynamics,2007,27(3):12-17.(in Chinese)
5Klees R and Massonnnet D.Deformation measurement using SAR interferometry:Potential and limitations[J].Geologie en,Mijnbouw,1999,77:161-176.
6B櫣rgmann R,Rosen P and Fielding E.Synthetic aperture radar interferometry to measure Earth’s surface topography and its deformation[J].A.Rev.Earth Planet.Sci.2000,28:169-209.
7吴云.台湾集集921地震地壳形变的简介与讨论[J].地壳形变与地震,2001,21(2):59～63.7Wu Yun.The crustal deformation of Chi-Chi earthquake in Taiwan[J].Crustal Deformation and Earthquake,2001,21(2):59-63.(in Chinese)
8Daocheng Sun,et al.Comparison study on the seismic de-formation of the1999Chi-Chi earthquake and Long-term strain gradient change along the Chelurgpu fault in centrol Taiwan[J].TAO,2000,11(3):738.
9Pathier E,Fruneau B,et al.Coseismic displacements of the footwall of the Chelungpu fault caused by the1999,Taiwan,Chi-Chi earthquake from InSAR and GPS data[J].Earth Planet.Sci.Lett.,2003,212:73-88.
10Chang C P and Wang C T.Application of SAR interferome-try to a large thrust deformation the1999Mw=7.6Chichi earthquake in central Taiwan[J].Geophys.J.Int,2004,159:9-16.
11Wang C T and Chen K S.Deformation field over western Taiwan island using satellite InSAR[R].IEEE,2005.
12Liu G X,Ding X L,et al.Pre-and co-seismic ground de-formations of the1999Chi-Chi,Taiwan earthquake,meas-ured with SAR interferometry[J].Computers and Geosci-ences,2004,30:333-343.
13Kampes B M and Usai S.Doris:the delft object-oriented radar interferometric software,2nd international symposium on operationalization of remote sensing[M].Enschede,The Netherlands,1999.
14Scharroo R and Visser P.Precise orbit determination and gravity field improvement for the ERS satellites[J].Jour-nal of Geophysical Research,1998,C4:8113-8127.
15Goldstein R M and Werner C L.Radar interferogram filte-ring for geophysical applications[J].geophys.Res.Lett.,1998,21:4035-4038.
16Chen C W and Zebker H A.Network approaches to two-dimensional phase unwrapping:intractability and two new algorithms[J].Journal of the Optical Society of America A,2000,17:401-414.
17Beauducel F and Biole P.Volcano wide fringes in the ERS SAR interferograms of Etna(1992-1998):Deformation or tropospheric effect?[J].Journal of Geophysical Re-search,2000,105:391-402.
18B櫣rgmann R,Ayhan M A,et al.Deformation during the12November1999,D櫣zce,Turkey Earthquake,from GPS and InSAR Data[J].Bull.Seismol.Soc.Am.,2002,92:161-171.
19Yu S B,Kuo L C,et al.Preseismic deformation and coseis-mic displacements associated with the1999Chi-Chi,Tai-wan,earthquake[J].Bulletin of the Seismological Society of America,2001,91:995-1012.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心