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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Range resolution improvement of airborne SAR images
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Range resolution improvement of airborne SAR images

机译：机载SAR图像的距离分辨率提高

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摘要

This letter proposes an algorithm to improve the range resolution in airborne synthetic aperture radar (SAR) data by coherently combining an interferometric image pair, i.e., two images acquired with slightly different viewing angles. This algorithm is based on the wavenumber shift principle. In contrast to other methods, developed for application to spaceborne SAR data, the proposed algorithm takes the nonlinear effects due the strong variations in incidence angle in airborne SAR data into account. The proposed method is applied to SAR data of German Aerospace Center (DLR)'s E-SAR sensor. Quantitative verification results are obtained by measuring the resolution of several corner reflectors placed in the area under study, as well as the resolution of speckle of different areas. It is demonstrated that a resolution improvement of almost a factor of two can be achieved by incorporating a second interferometric image, which can be acquired easily with an airborne sensor.
机译：这封信提出了一种算法，通过相干地组合干涉图像对，即以稍微不同的视角获取的两个图像，来提高机载合成孔径雷达（SAR）数据的距离分辨率。该算法基于波数移位原理。与开发用于星载SAR数据的其他方法相比，该算法考虑了机载SAR数据入射角的强烈变化引起的非线性影响。该方法适用于德国航空航天中心（DLR）的E-SAR传感器的SAR数据。通过测量放置在研究区域中的几个角反射器的分辨率以及不同区域的斑点的分辨率，可以获得定量验证结果。已经证明，通过结合第二干涉图像可以实现几乎两倍的分辨率提高，该第二干涉图像可以通过机载传感器容易地获取。

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