| 利用两种z变换算法的PS-DInSAR相位解缠与等价性证明 |
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| 引用本文： | 江国焰,许才军,李明峰,温扬茂.利用两种z变换算法的PS-DInSAR相位解缠与等价性证明[J].武汉大学学报(信息科学版),2011(3):338-341. |
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| 作者姓名： | 江国焰 许才军 李明峰 温扬茂 |
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| 作者单位： | 武汉大学测绘学院;南京工业大学土木工程学院; |
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| 基金项目： | 国家863计划资助项目(2009AA12Z317); 国家自然科学基金资助项目(4087400340721001); 国家公益(地震)行业科研专项基金资助项目(200808080) |
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| 摘 要： | 在介绍PS-DInSAR相位解缠函数模型的基础上,给出了应用LAMBDA方法求解模糊度和形变参数的过程,并将两种改进的z变换降相关算法——逆整乔列斯基和LLL应用于PS-DInSAR相位解缠。以z变换过程的迭代次数、z变换后的模糊度向量间的平均相关系数和协因数阵的谱条件数为准则,对两种算法进行仿真模拟和分析,结果表明逆整乔列斯基算法和LLL算法等价。最后从理论上对两种降相关算法的一致性进行了解释。
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| 关 键 词： | GPS 降相关算法 PS-DInSAR 相位解缠 |
Phase Unwrapping of PS-DInSAR Based on Two Kinds of z Transformation and Equality Demonstrating |
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| JIANG Guoyan XU Caijun LI Mingfeng WEN Yangmao.Phase Unwrapping of PS-DInSAR Based on Two Kinds of z Transformation and Equality Demonstrating[J].Geomatics and Information Science of Wuhan University,2011(3):338-341. |
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| Authors: | JIANG Guoyan XU Caijun LI Mingfeng WEN Yangmao |
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| Institution: | JIANG Guoyan1 XU Caijun1 LI Mingfeng2 WEN Yangmao1 (1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China) (2 College of Civil Engineering,Nanjing University of Technology,200 North Zhongshan Road,Nanjing 210009,China) |
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| Abstract: | Phase unwrapping is one of the most important cases in PS-DInSAR.As it is similar with the GPS ambiguity resolution,the process to solve the ambiguities and deformation parameters by the algorithm of LAMBDA is presented based on the function models of PS-DInSAR.Two algorithms of LLL and inverse integer Cholesky are applied to decorrelate,which is the also named as z transformation in LAMBDA.With the criterions of iterative numbers of z transformation,condition number of variance-covariance matrix and mean c... |
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| Keywords: | GPS algorithms of decorrelation PS-InSAR phase unwapping |
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