升降轨PSInSAR观测反演沉降与水平向位移试验
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摘要
In SAR观测的解算值为雷达视线向形变量,在具备多个方向独立观测的条件下可利用最小二乘方法反演垂直、东西甚至南北方向的形变量。由于难以同时获取上下、东西和南北3个方向上的独立观测值,因而可利用升降轨模式实现对垂向和东西方向移动量的估计。以PSIn SAR监测所获取的形变速率为观测值,利用二维简化模型求解地面沉降量和东西方向移动量。结果表明,研究区形变以沉降为主,水平方向移动微小,证明了升降轨PSIn SAR在地面沉降中的适用性和可靠性。
Multi-track In SAR measurements provide the potential for 2D and 3D displacement field retrieval and are commonly applied to coseismic deformation and earthquake source parameters estimation. Actually it is not possible to estimate 3D displacement vector since we can 't generate 3D observations for the same area. Joint analysis of ascending and descending PSIn SAR data enables the retrieval of vertical and horizontal displacement according to the sensitivity of In SAR measurements in different directions. In this paper,the authors made an experimental study of vertical and horizontal displacement retrieval by joint analysis of ascending and descending PSIn SAR data. A novel model has been adopted to estimate vertical and east-west displacement with the ascending and descending data. The retrieval displacement indicates that the difference between ascending and descending PSIn SAR measurements is not clear and the single track PSIn SAR can be well applied to subsidence monitoring.
Multi-track In SAR measurements provide the potential for 2D and 3D displacement field retrieval and are commonly applied to coseismic deformation and earthquake source parameters estimation. Actually it is not possible to estimate 3D displacement vector since we can 't generate 3D observations for the same area. Joint analysis of ascending and descending PSIn SAR data enables the retrieval of vertical and horizontal displacement according to the sensitivity of In SAR measurements in different directions. In this paper,the authors made an experimental study of vertical and horizontal displacement retrieval by joint analysis of ascending and descending PSIn SAR data. A novel model has been adopted to estimate vertical and east-west displacement with the ascending and descending data. The retrieval displacement indicates that the difference between ascending and descending PSIn SAR measurements is not clear and the single track PSIn SAR can be well applied to subsidence monitoring.
引文
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[3]Bonforte A F,Guglielmino M,Coltelli A,et al.Structural assessment of mount etna volcano from permanent scatterers analysis[J].Geochem Geophys Geosyst,12(2),doi:10.1029/2010GC003213.
[4]Hanssen R F.Radar Interferometry-data Interpretation and Error Analysis[M].New York:Kluwer Academic Publishers,2002:12-65.
[5]夏耶.巴姆地震地表形变的差分雷达干涉测量[J].地震学报,2005,27(4):423-430.Xia Y.Bam earthquake:Surface deformation measurement using Radar interferometry[J].Acta Seismologica Sinica,2005,27(4):423-430.
[6]孙建宝,梁芳,徐锡伟,等.升降轨道ASAR雷达干涉揭示的巴姆地震(Mw6.5)3D同震形变场[J].遥感学报,2006,10(4):489-496.Sun J B,Liang F,Xu X W,et al.3D co-seismic deformation field of the Bam earthquake(Mw6.5)from ascending and descending pass ASAR Radar interferometry[J].Journal of Remote Sensing,2006,10(4):489-496.
[7]葛大庆,王艳,张玲,等.德州地面沉降-回弹及地下水位波动的In SAR长时序监测——以德州市为例[J].国土资源遥感,2014,26(1):103-109.Ge D Q,Wang Y,Zhang L,et al.Seasonal subsidence-rebound and ground water level changes monitoring by using coherent target In SAR technique:A case study in Dezhou,Shandong[J].Remote Sensing for Land and Resources.2014,26(1):103-109.
[8]王艳,葛大庆,张玲,等.升降轨PSIn SAR地面沉降监测互检验与时序融合[J].国土资源遥感,2014,26(4):125-130.Wang Y,Ge D Q,Zhang L,et al.Inter-comparison and time series fusion of ascending and descending PSIn SAR data for land subsidence monitoring[J].Remote Sensing for Land and Resources,2014,26(4):125-130.
[2]Funning G J,Parsons B,Wright T J,et al.Surface displacements and source parameters of the 2003 Bam(Tran)earthquake from Envisat advanced synthetic aperture radar imagery[J].Journal of Geophysical Research,2005,110(B9):B09406.
[3]Bonforte A F,Guglielmino M,Coltelli A,et al.Structural assessment of mount etna volcano from permanent scatterers analysis[J].Geochem Geophys Geosyst,12(2),doi:10.1029/2010GC003213.
[4]Hanssen R F.Radar Interferometry-data Interpretation and Error Analysis[M].New York:Kluwer Academic Publishers,2002:12-65.
[5]夏耶.巴姆地震地表形变的差分雷达干涉测量[J].地震学报,2005,27(4):423-430.Xia Y.Bam earthquake:Surface deformation measurement using Radar interferometry[J].Acta Seismologica Sinica,2005,27(4):423-430.
[6]孙建宝,梁芳,徐锡伟,等.升降轨道ASAR雷达干涉揭示的巴姆地震(Mw6.5)3D同震形变场[J].遥感学报,2006,10(4):489-496.Sun J B,Liang F,Xu X W,et al.3D co-seismic deformation field of the Bam earthquake(Mw6.5)from ascending and descending pass ASAR Radar interferometry[J].Journal of Remote Sensing,2006,10(4):489-496.
[7]葛大庆,王艳,张玲,等.德州地面沉降-回弹及地下水位波动的In SAR长时序监测——以德州市为例[J].国土资源遥感,2014,26(1):103-109.Ge D Q,Wang Y,Zhang L,et al.Seasonal subsidence-rebound and ground water level changes monitoring by using coherent target In SAR technique:A case study in Dezhou,Shandong[J].Remote Sensing for Land and Resources.2014,26(1):103-109.
[8]王艳,葛大庆,张玲,等.升降轨PSIn SAR地面沉降监测互检验与时序融合[J].国土资源遥感,2014,26(4):125-130.Wang Y,Ge D Q,Zhang L,et al.Inter-comparison and time series fusion of ascending and descending PSIn SAR data for land subsidence monitoring[J].Remote Sensing for Land and Resources,2014,26(4):125-130.
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