多源SAR影像监测矿区建筑物三维位移场

发布时间：2019-08-01 08:09

【摘要】：合成孔径雷达差分干涉(差分InSAR)技术仅能获取雷达视线向(LoS)一维形变信息.通过分析LoS向形变的三维空间合成模型,研究了融合多源合成孔径雷达(SAR)影像求解建筑物三维形变的模型与算法.该算法利用具有不同空间几何的SAR影像获取目标在不同LoS向的形变信息,联合求解目标三维形变场.结果表明:三维算法反演的垂直向位移(即下沉)与水准数据相互吻合,均方根误差为士10 mm;东西向水平位移场符合开采沉陷规律.由于卫星采用极轨飞行,使得三维算法对南北向位移不敏感,反演精度差;由三维位移场计算的倾斜值以及东西向水平变形与实测值间的均方根误差分别为±0.21,±0.06 mm/m.
[Abstract]:The differential interferometric (differential InSAR) technique of synthetic aperture radar (SAR) can only obtain the one-dimensional deformation information of radar line-of-sight (LoS). Based on the analysis of the three-dimensional spatial synthesis model of LoS deformation, the model and algorithm of combining multi-source synthetic aperture radar (SAR) images to solve the three-dimensional deformation of buildings are studied. In this algorithm, SAR images with different spatial geometry are used to obtain the deformation information of the target in different LoS directions, and the 3D deformation field of the target is solved jointly. The results show that the vertical displacement (that is, subsidence) inversed by the three-dimensional algorithm is consistent with the leveling data, and the root mean square error is 10 mm; east-west horizontal displacement field in accordance with the law of mining subsidence. Because the satellite flies in polar orbit, the three-dimensional algorithm is insensitive to the north-south displacement and the inversion accuracy is poor. The inclination value calculated by the three-dimensional displacement field and the root mean square error between the east-west horizontal deformation and the measured value are 卤0.21 mm/m. and 卤0. 06 mm/m., respectively.
【作者单位】：中国矿业大学国土环境与灾害监测国家测绘局重点实验室;中国测绘科学研究院;中国矿业大学(北京)地球科学与测绘工程学院;
【基金】：国家高技术研究发展计划(863)项目(2011AA120402) 国家自然科学基金项目(41272389,41071273) 江苏高校优势学科建设工程项目(SA1102) 地理空间信息工程国家测绘地理信息局重点实验室基金项目(201303)
【分类号】：TN957.52

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