A parameter inversion for sea bridge based on high-resolution polarimetric synthetic aperture radar
A parameter inversion for sea bridge based on high-resolution polarimetric synthetic aperture radar
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DOI：
10.1007/s13131-016-0912-z
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发表时间：
2016-07
影响因子：
1.4
通讯作者：
Genwang Liu;Jie Zhang;Xi Zhang;J. Meng;Guoyu Wang
中科院分区：
文献类型：
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作者：
Genwang Liu;Jie Zhang;Xi Zhang;J. Meng;Guoyu Wang
水上桥梁的每次反射回波在高分辨率合成孔径雷达（SAR）图像中显示为宽条纹，这给参数反演带来了困难。因此，提出了一种用于高分辨率全极化SAR（PolSAR）的桥梁参数反演方法。首先，电桥每个部件的单次、两次和三次反射返回通过偏振散射特征进行区分。然后利用微波反射原理以及各反射回波的提取方法，分析了水面桥梁后向散射回波显示为条纹的原因，得到了参数反演方法。最后，利用全偏振AIRSAR数据反演桥梁的参数，包括高度（跨海大桥的顶面和底面）、宽度、厚度、跨度和桥塔高度。实测数据对比表明，该方法反演参数精度较高，桥高（底面）反演误差仅为1.3%。此外，结果还表明，对于高分辨率SAR，C和L波段图像在参数反演方面具有相同的能力。
Each reflection return of a bridge over water is displayed as wide stripe in a high-resolution synthetic aperture radar (SAR) image, which lead to difficulties in a parameter inversion. Therefore, a method of bridge parameter inversion is proposed for high-resolution full polarimetric SAR (PolSAR). First, the single, double and triple-bounce returns from each component of the bridge are distinguished by the polarization scattering features. Then the reasons which lead to the backscatter echoes of the bridge over water being displayed as stripes are analyzed, using a principle of microwave reflection, as well as an extraction method for each reflection return, and a parameter retrieval method is obtained. Finally, the parameters of the bridge, including the height (top and bottom surfaces of the sea bridge), width, thickness, span, and height of the bridge tower, are retrieved using full polarimetric AIRSAR data. When a comparison of the measured data is completed, the results indicate that the proposed method can invert the parameters with a high accuracy, and that the inversion error of the bridge height (bottom surface) is only 1.3%. Moreover, the results also show that for the high-resolution SAR, the C and L-band images have the same ability in regards to parameter retrieval.