利用星载InSAR技术提取镇江地区DEM及其精度分析

InSAR技术是目前获取高精度数字高程模型（DEM）的一种新方法。为了分析InSAR技术提取DEM的精度，首先介绍了美国航天飞机雷达SRTM DEM的精度和数据结构，然后以江苏镇江地区作为试验区，采用ERS1/2卫星影像来提取DEM，并对星载SAR提取的DEM与SRTM 3弧秒分辨率DEM的精度作了比较。 结果表明，利用星载SAR提取的DEM分辨率与SRTM 3弧秒分辨率的DEM相当，能很好地显示出地形起伏（如山脉、沟谷）的纹理特征。进一步的研究还表明，利用InSAR技术提取DEM的精度与SRTM 3 DEM之间存在5米左右的系统误差，并对产生这一系统误差的原因作了详细分析。

DEM generation and accuracy analysis in Zhenjiang using InSAR

Interferometric Synthetic Aperture Radar(InSAR) is a new method for acquiring precise Digital Elevation Model(DEM).To obtain the high quality of the DEM generated by spaceborne InSAR,the accuracy and data structure of SRTM DEM were investigated.Then DEM was generated using ERS1/2 SAR images in Zhenjiang of China,and its accuracy was compared with that of SRTM3 DEM.The results show that the resolution of the DEM generated by spaceborne InSAR was correspondent with SRTM3 DEM.The surface features of the test z...