基于高分三号数据的干涉测量研究

Experimental research on interferometry based on GF-3 SAR data

合成孔径雷达技术与传统测量技术相比,实现全天时、全天候对地观测,并监测地面的形变信息。2012年前,INSAR研究和应用团队仍然停留在依赖于国外数据的窘迫现状。随着资源三号、环境一号卫星的发射,作为光学卫星为我国测绘事业提供不少便利,但是国内并没有一颗真正意义的SAR卫星。2016年,高分三号作为首颗SAR卫星解决国内SAR卫星数据短缺的问题,研究高分三号卫星的InSAR能力,同时将高分三号卫星应用范围得以拓展。本文对高分三号河南省登封市周围地区进行实验分析,并与InSAR技术成熟的哨兵一号卫星数据进行对比分析,得出结论:①合成孔径雷达采集时间间隔29 d或者29 d的倍数并且雷达入射角相同的高分三号数据可以用于InSAR试验,通过合成孔径雷达干涉测量技术对地表进行形变监测,验证高分三号的干涉测量能力;②通过高分三号数据进行山区形变监测,利用哨兵一号数据对测区进行对比分析,验证高分三号提取地表形变信息的能力。

Compared with the traditional measurement technology, synthetic aperture radar(SAR) technology can realize all day and all-weather observation to earth and monitor the deformation information of the ground. Before 2012, the domestic INSAR research and application team remained in the embarrassing situation of relying on foreign data. With the launch of ZY-3 and HJ-1 satellite, as optical satellites, there are many conveniences for our surveying and mapping business, but there is not a real SAR satellite in China. GF-3,made by China, is the first SAR satellite to solve the problem of lacking SAR satellite data of China in 2016. The research of addressing the InSAR capability of GF-3 has the significance of preresearch. At the same time, the application scope of the GF-3 is extended. This paper makes an experimental analysis of the surrounding area of Dengfeng, Henan, China. Compare it with the satellite data of Sentinel-1, which is mature in InSAR technology, and reach conclusions:a.The synthetic aperture radar acquisition time interval is 29 days or 29 days multiples, and the GF-3 data with the same angle of incidence can be used for the InSAR test.The interferometric ability of GF-3 is verified by the deformation monitoring of the surface using InSAR technology;b.Mountain area deformation monitoring is carried out by using GF-3 data. Comparative analysis is conducted with Sentinel-1 data to verify the ability of GF-3 to extract surface deformation information.