Coregistration of Interferometric Stacks of Sentinel-1 TOPS Data
Coregistration of Interferometric Stacks of Sentinel-1 TOPS Data
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DOI：
10.1109/lgrs.2017.2691398
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发表时间：
2016-06
影响因子：
4.8
通讯作者：
Nestor Yague-Martinez;F. De Zan;P. Prats-Iraola
中科院分区：
文献类型：
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作者：
Nestor Yague-Martinez;F. De Zan;P. Prats-Iraola
合成孔径雷达图像的共配准是干涉图生成的基础。由于TOPS采集模式的高方位共配要求，由于时间去相关效应，需要采用一种先进的方法对叠加时间序列图像进行共配。在某些情况下，相对于同一主节点两两估计位移的传统方法可能会导致不足。因此，本文提出了一种联合估计方法，将所有干涉图联合利用，以获得更准确的结果。模拟数据和在IW模式下获得的Sentinel-1A图像用于验证该程序，证明与标准单主方法相比，联合方法具有更好的性能。
The coregistration of synthetic aperture radar images is of fundamental importance for the generation of interferograms. The high azimuth coregistration requirements imposed by the TOPS acquisition mode imply that an advanced approach for the coregistration of stacked time series images is needed due to temporal decorrelation effects. In some scenarios, the conventional approach of estimating the shifts pairwise with respect to the same master might result insufficient. Therefore, a joint estimation is proposed here, which exploits jointly all interferograms in order to retrieve more accurate results. Simulated data and Sentinel-1A images acquired in IW mode are used to validate this procedure, demonstrating the better performance of the joint approach when compared to the standard single-master approach.