【作者】 李芳芳； 胡东辉； 丁赤飚； 仇晓兰；

【Author】 Fangfang Li;Donghui Hu;Chibiao Ding;Xiaolan Qiu;Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Institute of Electronics, Chinese Academy of Sciences;Institute of Electronics, Chinese Academy of Sciences;

【机构】 中国科学院空间信息处理与应用系统技术重点实验室； 中国科学院电子学研究所；

【摘要】 In SAR技术具有高精度的地形测绘能力。然而在山区地形条件下,受SAR侧视成像的影响,存在较多的几何畸变区域,干涉相位表现为不连续或者缺少有效信息的情况,对单一的干涉图像对处理难以得到精确的DEM。融合两个或多角度的干涉数据可以用于解决这一问题。本文根据这一思路利用机载双天线In SAR对飞数据进行实验,针对山区地形条件下运动补偿、相位解缠两个方面提出高精度的处理方法,从而尽可能降低单一角度数据的DEM误差,以达到消除对飞数据重叠区域三维定位不一致的目的,拼接实验结果验证了处理方法的有效性。更多还原

【Abstract】 Interferometric synthetic aperture radar(In SAR) is a powerful technique for precise topographic mapping. However, due to the side-looking SAR imaging geometry, the geometry distortion phenomenon arises in the mountainous scenarios. Because of phase discontinuities or the absence of valid phase, for single aspect In SAR data, it is difficult to recover accurate DEM in such areas. Fusion of two or more different aspects of In SAR data is practicable to deal with this problem. In this paper, experiments using two anti-parallel aspects of airborne In SAR data are carried out based on this idea. In order to decrease the processing error of every single aspect data and fuse them seamlessly, motion compensation and phase unwrapping methods for the mountainous area are presented. Experimental results verified the effectiveness of the processing methods.更多还原