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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >High-Resolution InSAR Building Layovers Detection and Exploitation
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High-Resolution InSAR Building Layovers Detection and Exploitation

机译：高分辨率InSAR建筑物层积检测与开发

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摘要

Layover affects the quality of urban interferometric synthetic aperture radar (InSAR) digital elevation models. Moreover, it is generally difficult to interpret because of the superposition of several contributions in a single SAR pixel. In this paper, a novel technique for the extraction of building layovers is first presented. It makes use of the geocoding stage embedded in the InSAR processor. It is shown that building layovers create a regular pattern in the mapping counter, a map describing the number of occurrences of a SAR pixel in the elevation model. Its exploitation yields a generation of a layover map without the use of external supports. The integration in the processor with a limited additional computational load and the capability to isolate layover signatures are additional benefits. Layover patches are then individually analyzed toward a better understanding of the complex urban signal return. A spectral estimation framework is employed to assess the slopes superimposed in the patches. Fringe-frequency estimation is involved. A set of simulations made for a nonparametric (fast Fourier transform) and a parametric (multiple signal classification) technique is performed prior to testing on real data. It is demonstrated that in X-band, for a single interferogram, just one layover contributor, when it dominates over the others, can be extracted with a sufficient accuracy. The algorithms are tested on a TanDEM-X spotlight acquisition over Berlin (Germany).
机译：停留时间会影响城市干涉合成孔径雷达（InSAR）数字高程模型的质量。此外，由于单个SAR像素中多个分量的叠加，通常很难解释。在本文中，首先提出了一种用于提取建筑物中层的新技术。它利用了InSAR处理器中嵌入的地理编码阶段。结果表明，建筑物的布局会在映射计数器中创建规则的模式，该映射描述了高程模型中SAR像素出现的次数。它的开发无需使用外部支持即可生成一个中转图。在处理器中的集成以及有限的额外计算负载以及隔离中转签名的能力是额外的优势。然后分别对下垂斑块进行分析，以更好地了解复杂的城市信号返回。频谱估计框架用于评估贴片中叠加的斜率。涉及边缘频率估计。在对真实数据进行测试之前，会执行一组针对非参数（快速傅立叶变换）和参数（多信号分类）技术的模拟。结果表明，在X波段中，对于一个干涉图，只有一个停留点占主导地位，而其他干扰点占主导地位，则可以足够的精度提取出来。该算法在柏林（德国）的TanDEM-X聚光灯采集系统上进行了测试。

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