不同模式Radarsat影像DEM提取及精度比较  

Radargrammetry DEM from Different Beam Mode Radarsat Imageries and Accuracy Comparison

作　　者：胡德勇[1] 李京[1] 陈云浩[1] 邓磊[1] 

机构地区：[1]北京师范大学资源学院,北京100875

出　　处：《遥感技术与应用》2006年第6期541-546,共6页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目(40201036);三维信息获取与应用教育部重点实验室基金资助

摘　　要：利用摄影测量方法进行DEM提取是热带雨林地区雷达应用方向之一。以热带雨林地区平地、丘陵和山地混合地形区为研究对象,收集了F、S和W等不同波束模式的R adarsat-1 SAR影像9景,组合成6个不同类型的立体像对,进行DEM提取,探讨基于距离/多普勒构像方程的R adarsat影像的DEM提取方法。通过对DEM结果进行精度验证和比较,认为提取的DEM精度受多种因素影响,同种波束模式的立体配置,立体交会角越大,DEM精度越高;对于地表起伏较小的平地,DEM精度要高于丘陵山地区,该研究区DEM精度的平均误差可以达到14 m左右,RM SE可以达到29 m左右。It is an application field to extract DEM using radargrammetry method in tropical rainforest area.Digital Elevation Model(DEM) images are generated from nine Radarsat-1 images(F,S and W beam modes) which make up six stereo pair combinations,based on range/Dopple imaging equation.The selected study area is a tropical rainforest area which consists of a mixture of plain,hilly and mountainous terrain.The DEM accuracies for all the stereo combinations have been validated and compared to each other.The results show that numerous factors affect the final DEM accuracy,the higher the stereo intersection angle of the same beam mode,the better the accuracy of the final DEM.In flat areas,the final DEM accuracy is higher than hilly and mountainous areas,and the DEM accuracy can reach to about 14 m(average error) and 29 m(root mean square error) in this study area.

关 键 词：RADARSAT DEM 立体像对 精度 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]