CAJ | 학술논문

InSAR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PSInSAR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PSInSAR在地面沉降中的适用性和可靠性。
InSAR관측적해산치위뢰체시선향형변량，재구비다개방향독립관측적조건하가이용최소이승방법반연수직、동서심지남북방향적형변량。유우난이동시획취상하、동서화남북3개방향상적독립관측치，인이가이용승강궤모식실현대수향화동서방향이동량적고계。이PSInSAR감측소획취적형변속솔위관측치，이용이유간화모형구해지면침강량화동서방향이동량。결과표명，연구구형변이침강위주，수평방향이동미소，증명료승강궤PSInSAR재지면침강중적괄용성화가고성。
Multi-track InSAR measurements provide the potential for 2 D and 3 D 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 PSInSAR data enables the retrieval of vertical and horizontal displacement according to the sensitivity of InSAR 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 PSInSAR 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 PSInSAR measurements is not clear and the single track PSInSAR can be well applied to subsidence monitoring.