| 机载干涉SARDEM绝对定向技术研究 |
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| 引用本文： | 王宁娜,黄国满,杨本勇,杨书成,赵争.机载干涉SARDEM绝对定向技术研究[J].测绘科学,2012(1):32-34. |
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| 作者姓名： | 王宁娜 黄国满 杨本勇 杨书成 赵争 |
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| 作者单位： | 中国测绘科学研究院;四川省遥感信息测绘院;武汉大学测绘学院 |
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| 基金项目： | 国家863主题项目“高精度三维信息提取技术”(2011AA120402);国家测绘局重点实验室基金“高分辨率机载SAR立体制作DLG技术研究”(K201002) |
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| 摘 要： | 机载干涉SAR产生的未经地理编码的DEM有较高的相对高程精度,但因其是基于斜距表达的,且干涉几何定标存在误差,需要利用控制点来进行绝对定向。本文首先改正由地形起伏引起的像点位移,将斜距DEM转换成地距DEM,然后根据空间相似变换,将地距DEM视为刚体,利用控制点求模型平移偏量、缩放因子及旋转角,达到绝对定向的目的。
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| 关 键 词： | 机载干涉SAR DEM 绝对定向 斜距地距转换 空间相似变换 |
A study of airborne Interferometric SAR DEM absolute orientation |
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| WANG Ning-na①,HUANG Guo-man①,YANG Ben-yong②,YANG Shu-cheng①③,ZHAO-Zheng.A study of airborne Interferometric SAR DEM absolute orientation[J].Science of Surveying and Mapping,2012(1):32-34. |
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| Authors: | WANG Ning-na① HUANG Guo-man① YANG Ben-yong② YANG Shu-cheng①③ ZHAO-Zheng |
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| Institution: | ①(①Institute of Photogrammetry and Remote Sensing,Chinese Academy of Surveying and Mapping,Beijing 100830,China;② Sichuan Remote Sensing Geomatics Institute,Chengdu 610100,China;③School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China) |
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| Abstract: | DEM from airborne Interferometric Synthetic Aperture radar(InSAR)systems has precise relative elevation accuracy.It is based on slant range,and the interferometric calibration is not accurate,in order to achieve the purpose of absolute orientation,GCPs are necessary.This paper first converted slant DEM to ground DEM by rectifying the point displacement caused by terrain,then treated ground DEM as rigid bodies,at last,according to spatial similarity transformation,got the model’s orientation parameters with GCPs. |
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| Keywords: | airborne InSAR DEM absolute orientation slant rang to ground range spatial similarity transformation |
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