摘要
将差分滤波思想引入到多基线InSAR相位解缠中,以较短基线干涉图解缠结果指导较长基线干涉图的相位解缠,从而扩展相位解缠的非模糊区间,解决较长基线干涉图中欠采样区域的相位解缠难题。利用由SRTM DEM和SIR-C/X-SAR干涉数据获取的DEM进行实验,得到了满意的相位解缠结果。
Phase unwrapping is one of the key techniques of multi-baseline InSAR.In order to provide algorithms for phase unwrapping of multi-baseline InSAR,zero intermediate frequency vector filtering algorithm was used for reference.A new phase unwrapping algorithm based on difference filtering was proposed by inducing difference filtering to phase unwrapping.In this method,phase unwrapping of interferogram with longer baseline was guided by the unwrapped interferogram with shorter baseline,the un-fuzzy phase interval of phase unwrapping was extended,and the difficulty of phase unwrapping for sub-sampling area in interferogram with longer baseline was solved.The multi-baseline phase unwrapping experiments were done with simulated interferograms from DEMs of SRTM and SIR-C/X-SAR.The satisfying phase unwrapping results have been gotten.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第9期1030-1034,共5页
Geomatics and Information Science of Wuhan University
基金
中国博士后科学基金资助项目(200801111)
国家自然科学基金资助项目(40771142
40871213
41071296)
国家西部1:50000地形图空白区测图工程资助项目
