Analysis of Ground-Based SAR Data With Diverse Temporal Baselines
Analysis of Ground-Based SAR Data With Diverse Temporal Baselines
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DOI：
10.1109/tgrs.2008.916216
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发表时间：
2008-05
影响因子：
8.2
通讯作者：
L. Noferini;T. Takayama;M. Pieraccini;D. Mecatti;G. Macaluso;G. Luzi;C. Atzeni
中科院分区：
文献类型：
--
作者：
L. Noferini;T. Takayama;M. Pieraccini;D. Mecatti;G. Macaluso;G. Luzi;C. Atzeni
在本文中，卫星合成孔径雷达（SAR）干涉测量的算法开发的地面合成孔径雷达（GB-SAR）的配置和用于检测的高山滑坡发生了多年的位移。实际上，GB-SAR干涉测量法基于与卫星SAR技术相同的原理，但得益于GB-SAR的多功能性和每天收集许多图像的能力。在监测每年仅移动几厘米的山体滑坡的应用中，正如本文所报道的那样，GB-SAR传感器在观察期内每隔几个月重复安装一次。虽然重访时间与卫星非常相似，但每次调查持续两三天，可获得十多幅图像。它们被单独分析，并与其他调查的图像相结合，以进行连贯的像素选择。干涉图是通过交叉组合来自不同勘测的图像而形成的。最后，整个调查的变形的演变检索在最小二乘意义上没有任何假设的规律性。所使用的GB-SAR技术在本文中进行了详细的描述，并得到的结果进行了讨论，在意大利阿尔卑斯山，已被监测超过一个为期约三年的滑坡。
In this paper, the algorithms developed for satellite synthetic aperture radar (SAR) interferometry were adapted to the ground-based SAR (GB-SAR) configuration and used for detecting the displacements of an alpine landslide which have occurred over many years. Indeed GB-SAR interferometry is based on the same principles as satellite SAR techniques but benefits from the GB-SAR's versatility and capability of gathering many images per day. In monitoring applications of landslides moving only few centimeters per year, as the case here reported, the GB-SAR sensor is installed at repeated intervals several months apart over the observation period. Although the revisiting time is very similar to the satellite one, for each survey, lasting two or three days, more than ten images are available. They are analyzed separately and in combination with images from other surveys for coherent pixel selection. Interferograms are formed by cross-combining images from different surveys. Finally, the evolution of the deformation across the surveys is retrieved in a least square sense without any assumptions on its regularity. The used GB-SAR technique is described in detail in this paper, and the results obtained with regard to a landslide in the Italian Alps that has been monitored over a period of about three years are discussed.