摘要
多基线干涉SAR以其避开相位解缠、无需控制点等优势得到越来越多的重视。本文介绍了多基线高程反演中最常使用的MLHE算法,分析了该方法的局限性,指出其不适用于真实数据,特别是机载数据;然后将由RD模型和椭球方程组成的严密几何模型引入到MLHE算法中,对算法加以改进。最后利用中国测绘科学研究院的CASMSAR-X系统获取的多基线干涉数据进行实验,获得了良好的效果。
Multi-Baseline InSAR got more and more attention because of its no requirement in phase unwrapping, ground control points and so on. This paper introduced MLHE method of multi-baseline ele- vation inversion, analysed the limitation and pointed out that it does not apply to the real airborne data. To improve the algorithm, a strict geometric model made by RD model and ellipsoid equations was introduced into MLHE. Finally, the experimental data obtained by CASMSAR-X system were processed to verify the feasibility of the algorithm, and got good results.
出处
《测绘科学》
CSCD
北大核心
2014年第3期13-18,共6页
Science of Surveying and Mapping
基金
国家863计划主题项目(2011AA120405-1)
国家863计划主题项目(2011AA120402)
关键词
多基线干涉SAR
高程反演
MLHE
干涉相位
Key words, multi-baseline InSAR
elevation inversion
MLHE
interferometric phase
