InSAR技术在沂沭断裂带地表形变监测中的应用研究

针对常规大地测量监测沂沭断裂带地表形变结果无法全面反演该区域构造应力场的局限性,尝试采用PS和SBAS两种In SAR时序分析技术对该区域地表形变进行监测。首先对SBAS-In SAR技术的原理进行详细推导和分析;在此基础上,对覆盖研究区的14景ENVISAT-ASAR数据采用PS-In SAR和SBAS-InSAR技术进行处理,分别提取了该区域地表年平均形变速率图;通过与水准监测数据的对比分析发现:InSAR时序分析方法在大范围、持续缓慢断裂带地表形变监测中能够获取与精密水准监测一致的形变趋势,且SBAS-In SAR技术在数据量较少情况下能获得更好的监测效果。这表明In SAR时序分析技术可以作为断裂带微小地表形变监测的有效手段。

Research of SAR Interefrometry for Yishu Fault Zoon Surface Deformation Monitoring

Aiming at the limitations of the traditional geodetic measurements in inversing the tectonic stress field completely in the region near Yishu fault zone. Two InSAR time series analysis methods were introduced into the deformation monitoring of the region. The paper firstly derived and analysed the basic principles of SBAS-InSAR technique detailedly. On this basis 14 scenes of ENVISAT-ASAR images covering the area were processed and analysed by using the PS-InSAR and SBAS-InSAR technique the annual average rate of deformation of the area was obtained. The results compared with precise leveling measurements shows that the two methods are of consis-tency in deformation tendency and SBAS-InSAR technology can get a better effectiveness of monitoring with the small amount of data in monitoring the wide range continuous slow fault surface deformation. The research results show that the InSAR time series analysis method can be used as a tools in small surface deformation monitoring of the fault.