基于轨道精炼控制点精选的极艰险区域时序InSAR地表形变监测

Time series InSAR surface deformation monitoring in extremely difficult area based on track refining control points selection

极艰险区域具有地形起伏极大、地理环境复杂和永久散射体稀少的特点,为此文章设计了一种改进的SBAS-InSAR技术进行地表形变监测。文章先从相干性、振幅离差指数、形变速率三个方面获得候选的永久性散射体点,之后辅以光学影像精选出最终的永久性散射体点,将其作为轨道精炼控制点引入SBAS-InSAR解算过程,最终完成了研究区的地表形变监测。通过对比分析常规的PS-InSAR技术与SBAS-InSAR技术,该技术在极艰险区域具有良好的应用价值。

The extremely difficult area has the characteristics of extremely rugged terrain,complex geographical environment and sparse permanent scatterers.Therefore,an improved SBAS-InSAR technology is designed to monitor the surface deformation.In this paper,the candidate permanent scatterers are obtained from the coherence,amplitude dispersion index and deformation rate,and then the final permanent scatterers are selected by optical images,which are introduced into the SBAS-InSAR calculation process as orbit refining control points,and finally the surface deformation monitoring in the study area is completed.By comparing and analyzing the conventional PS-InSAR technology and SBAS-InSAR technology,the technology has good application value in extremely difficult areas.