ScanSAR focusing and interferometry
ScanSAR focusing and interferometry
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DOI：
10.1109/36.508420
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发表时间：
1996-07
期刊：
影响因子：
--
通讯作者：
A. M. Guarnieri;C. Prati
中科院分区：
文献类型：
--
作者：
A. M. Guarnieri;C. Prati
作者讨论了一种用于 ScanSAR 聚焦的有效相位保持技术，用于获取适合 ScanSAR 干涉测量的图像。给定同一区域的两个复杂聚焦 ScanSAR 图像，可以像传统的重复通过 SAR 干涉测量一样生成干涉图。然而，由于 ScanSAR 图像的非平稳方位谱，干涉对的相干性和干涉图分辨率受到影响，这既受到两次通过之间可能的扫描重合失调的影响，也受到沿方位角的地形坡度的影响。如果满足扫描失准的某些条件，则可以通过方位角变化滤波器来显着减少所产生的去相关。最后，提出了SAR-ScanSAR干涉测量：这里总是可以去除去相关。通过所提出的技术没有分辨率损失。
The authors discuss an efficient phase preserving technique for ScanSAR focusing, used to obtain images suitable for ScanSAR interferometry. Given two complex focused ScanSAR images of the same area, an interferogram can be generated as for conventional repeat pass SAR interferometry. However, due to the nonstationary azimuth spectrum of ScanSAR images, the coherence of the interferometric pair and the interferogram resolution are affected, both by the possible scan misregistration between two passes and by the terrain slopes along the azimuth. The resulting decorrelation can be significantly reduced by means of an azimuth varying filter, provided that some conditions on the scan misregistration are met. Finally, the SAR-ScanSAR interferometry is proposed: here the decorrelation can always be removed. With no resolution loss by means of the technique presented.