利用 PALSAR 数据提取地面沉降短基线集方法研究

摘要

短基线集DInSAR方法可以很好地克服数据相干性差的困难，本文在分析短基线集方法的基础上，对大气相位和轨道误差相位的影响进行处理得到较为精确的形变相位。采用天津实验区从2007年1月17日～2009年10月25日的17景PALSAR单视幅图像提取地面相对沉降信息，将DInSAR与水准测量数据进行融合得到外部精度为3.8 mm的沉降结果，同时确定了天津地面的沉降漏斗的分布和绝对形变量。%The short baseline subset DInSAR technology can be very good to overcome the difficulties of poor coherence data ,this paper is based on the analysis of short baseline subset method to weak the atmospheric phase and orbital phase error , then gain more accurate deformation phase .This paper collected 17 ALOS PALSAR single complex images since the January 17,2007 to October 2009,25 which cover the Tianjin area ,Intergration of DInSAR and leveling data to get external precision as the settlement results of 3.8 mm.Finally,Tianjin ground subsidence funnel distribution and absolute variables are determined .