Spaceborne Spotlight SAR Interferometry With TerraSAR-X
Spaceborne Spotlight SAR Interferometry With TerraSAR-X
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DOI：
10.1109/tgrs.2008.2004714
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发表时间：
2009-03
影响因子：
8.2
通讯作者：
M. Eineder;N. Adam;R. Bamler;Nestor Yague-Martinez;H. Breit
中科院分区：
文献类型：
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作者：
M. Eineder;N. Adam;R. Bamler;Nestor Yague-Martinez;H. Breit
近日，卫星在聚光模式下获取的1米分辨率合成孔径雷达（SAR）数据向公众开放。在本文中，我们阐明了带状地图和聚光 SAR 数据的干涉处理之间的差异，并概述了方位多普勒滤波等关键处理步骤的适当算法。我们进一步展示了第一个 TerraSAR-X 聚光干涉图，以及对干涉测量至关重要的参数的评估。我们的结果表明 TerraSAR-X 传感器及其产品具有非常好的几何精度、稳定性和相位保真度。根据干涉图，我们能够在几个例子中确定较大建筑物的高度和毫米级结构变形。成像建筑物的高细节水平和 X 波段城市地区良好的时间相位相干性使聚光干涉测量成为一种令人兴奋的处理技术，可实现测量单个建筑物等新应用。
Recently, synthetic aperture radar (SAR) data with 1-m resolution acquired by satellites in spotlight mode became available to the public. In this paper, we elucidate the differences between interferometric processing of strip map and of spotlight SAR data, and we outline adequate algorithms for key processing steps such as azimuth Doppler filtering. We further present first TerraSAR-X spotlight interferograms, together with an evaluation of the paraeters that are critical for interferometry. Our results indicate a very good geometric accuracy, stability, and phase fidelity of the TerraSAR-X sensor and its products. From the interferograms, we are able to determine the heights of larger buildings and millimeter-scale structural deformation in several examples. The high detail level of imaged buildings and the good temporal phase coherence of urban areas in X-band make spotlight interferometry an exciting processing technique that enables new applications such as surveying individual buildings.