Advanced Polarimetric Stereo-Sar for Tsunami Debris Estimation and Disaster Mitigation
Advanced Polarimetric Stereo-Sar for Tsunami Debris Estimation and Disaster Mitigation
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用于海啸碎片估计和减灾的先进偏振立体SAR
DOI：
10.1109/igarss.2019.8898619
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Motoyuki Sato
中科院分区：
文献类型：
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作者：
C. Koyama;S. Koshimura;Motoyuki Sato
碎片估计是东日本大地震和海啸等灾难发生后最重要的初始挑战之一。必须尽快向决策者提供对碎片的合理估计。获得这些信息的传统方法远非最佳，通常依赖于对光学图像的人工解释。我们已经开发出一种新的方法来估计海啸碎片堆的高度和体积，以提高应急响应。该方法是基于立体合成孔径雷达（立体SAR）的方法非常高分辨率的机载极化SAR。一个先进的基于梯度的光流估计技术适用于低相干非干涉数据的最佳图像配准。它适合于联合收割机多分辨率数据，允许通过结合两个不同的传感器生成立体合成孔径雷达数据。基于模型分解的PolSAR数据，只有奇数反弹散射的贡献被用来优化回波时间计算。在本文中，我们提出了进一步发展的方法相结合的多分辨率数据从i）空/星载SAR和星载/星载SAR与各种照明几何。所提出的技术进行了验证，使用现场数据的真实的海啸碎片采取的临时碎片管理网站在海啸影响区附近的仙台市，日本。估计的高度误差是在0.7米RMSE的顺序。由于导出的堆高质量良好，因此可以估计碎片体积，其RMSE为2 500 m3，相当于碎片总体积的10%以下。所提出的方法的优点是快速的计算时间，和强大的高度和体积估计的碎片堆，而不需要事件前的数据或辅助信息，如DEM，地形图或GCPs。
Debris estimation is one of the most important initial challenges after a disaster like the Great East Japan Earthquake and Tsunami. Reasonable estimates of the debris must be made available to decision makers as quickly as possible. Classical approaches to obtain this information are far from being optimal, usually relying on manual interpretation of optical imagery. We have developed a novel approach for the estimation of tsunami debris pile heights and volumes for improved emergency response. The method is based on a stereo-synthetic aperture radar (stereo-SAR) approach for very high-resolution airborne polarimetric SAR. An advanced gradient-based optical-flow estimation technique is applied for optimal image coregistration of the low-coherence non-interferometric data. Its suitability to combine multiresolution data allows generating stereo SAR data by combining two different sensors. Based on model-based decomposition of the PolSAR data, only the odd bounce scattering contributions are used to optimize echo time computation. In this paper, we propose the further development of the method by combining multiresolution data from i) air-/spaceborne SAR and spaceborne/spaceborne SAR with various illumination geometries. The proposed technique is validated using in situ data of real tsunami debris taken on a temporary debris management site in the tsunami affected area near Sendai city, Japan. The estimated height error is in the order of 0.7 m RMSE. The good quality of derived pile heights allows estimating debris volume with an RMSE of 2500 m3 corresponding to <10% of the total debris volume. Advantages of the proposed method are fast computation time, and robust height and volume estimation of debris piles without the need for pre-event data or auxiliary information like DEM, topographic maps or GCPs.
使用 Pi-SAR 方形环飞行数据进行偏振 3D 成像重建。
DOI：
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发表时间：
2006
期刊：
Abstract IGARSS2006
影响因子：
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作者：
Tadashi Hamasaki;Motoyuki Sato;L. Ferro-Famil;Eric Pottier
通讯作者：
Eric Pottier