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测绘学报  2014 

机载双天线InSAR联合定标算法

DOI: 10.13485/j.cnki.11-2089.2014.0139, PP. 1259-1265

Keywords: 机载InSAR,三维重建模型,干涉定标参数,重复航迹,高程连接点,联合定标

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Abstract:

为了提高InSAR获取DEM的精度,实际生产作业过程中每一架次均须飞临定标场,这就要求测绘人员需要多次布设角反射器.本文针对外业重复布设角反射器耗费时间和人力的问题,提出一种新的机载双天线InSAR联合干涉参数定标算法,实现了利用一次布设的控制点同时标定多架次干涉参数,减少了野外布设角反射器的工作量.该方法首先基于敏感度方程的定标方法选择适于机载双天线InSAR数据的干涉定标参数,其次将基于局部配准的配准方法和PSInSAR中PS点选取的方法首次引入高程连接点的选取中,实现了多架次同一场景的高程衔接.最后,根据控制点和连接点高程属性的差异,建立了不同的误差方程,组成联合定标模型,并利用中国测绘科学研究院的CASMSAR-X数据进行了联合定标试验,验证了该算法的正确性和有效性.

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