基于InSAR技术的DEM提取及InSAR DEM精度与地形因子的关系

摘要

为研究基于InSAR技术DEM精度以及与地形因子的关系,以巴姆地区ENVISAT卫星SAR影像作为试验数据.利用InSAR技术提取DEM,研究InSAR DEM与SRTM-3 DEM精度关系,同时重点研究InSAR DEM的精度与地形因子关系特征.结果表明,研究区域InSAR DEM与SRTM-3 DEM高程差异的中误差为12.50 m,并且精度与地形因子密切相关.%In order to study DEM accuracy based on InSAR technology and relationship with terrain factor,with ENVTSAT satellite SAR images in Bam City as an example,DEM was generated by using InSAR technology,and the relationship between InSAR DEM and SRTM-3 DEM was studied,and also focused on study relationship characteristics between InSAR DEM accuracy and terrain factor. The results showed that the elevation difference error of the test zone in InSAR DEM and SRTM-3 DEM is 12.50 m,its accuracy is related to terrain factor.