利用Sentinel-1A SAR影像监测尼泊尔“4·25”地震变形

Seismic deformation monitoring of Nepal April 25 earthquake using Sentinel-1A SAR data

为利用新一代欧洲太空局SAR系统Sentinel-1A卫星获取大面积地震变形数据,对其监测模式和数据特点进行研究,给出针对TOPSAR成像干涉数据处理的拼接方法,并利用Sentinel-1A数据获取尼泊尔"4·25"地震区域约160 km×180 km的地表形变。结果显示,地震导致的雷达视线向相对变形最大达2 m。

To obtain large-area seismic deformation,the imaging mode and data characteristics of ESA＇s new generation Sentinel-1A SAR were studied. The method for processing interferometric data from TOPSAR images is presented in this paper. Based on data from the Sentinel-1A,an interferogram covering an area of 160 km×180 km in the region of the Nepal April 25 earthquake was generated. The results show that the maximal relative deformation in the line of sight direction reaches about 2 m.