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SAR interferometry: confronting incoherence in phase unwrapping

机译:SAR干涉测量法:相位展开中的不相干性

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摘要

Automated phase unwrapping of a highly incoherent differential interferogram of the Arthur's Pass earthquake of 1994 has illustrated many challenges to the use of interferometric SAR in the New Zealand environment. Though severe decorrelation between interferometric pairs is common in New Zealand, processing of images for differential interferometry is motivated by the geologically active landscape. The weighted full multigrid (WFMG) phase unwrapping method of Pritt has been implemented for its robust, global operation. This paper examines the opposing requirements to block out the distorting effect of incoherence, and yet to retain valuable connections between coherent regions. Using both synthesised examples and the Arthur's Pass differential interferogram to illustrate, we propose a modification to the WFMG algorithm, which improves its performance for highly incoherent interferograms.
机译:1994年亚瑟'口地震的高度不连贯的微分干涉图的自动相位展开表明,在新西兰环境中使用干涉式SAR面临许多挑战。尽管在新西兰,干涉测量对之间存在严重的去相关现象,但差分地质法对图像的处理是受地质活跃景观的推动。 Pritt的加权全多网格(WFMG)相位展开方法已经实现了其强大的全局操作能力。本文研究了相反的要求,以阻止不连贯的扭曲效应,并保持相干区域之间的宝贵联系。使用合成的示例和Arthur的Pass微分干涉图进行说明,我们提出了WFMG算法的一种改进,它改进了其在高度非相干干涉图中的性能。

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