利用局部先验知识的InSAR基线估计方法

针对干涉合成孔径雷达中产生高精度的数字高程图需要精确测量或估计基线参数的问题，提出了一种利用局部先验知识的干涉合成孔径雷达基线估计方法．利用去平地后的干涉数据进行基线估计，对去平地后的干涉相位图进行相位解缠绕，再利用局部先验知识选取两个高度相同的点进行基线估计，根据基线和高程之间直接的转换关系，无须知道两点真实的干涉相位，可以有效地在无强散射点的区域进行基线估计．仿真数据验证了该算法的有效性，基线估计的精度不低于厘米级．

Locally knowledge-based InSAR baseline estimation method

The accuracy of InSAR baseline measurement or estimation is the key factor of digital elevation model(DEM) generation.In this paper,a locally knowledge-based InSAR baseline estimation method is proposed,which estimates the InSAR baseline using the interferogram with the flattened earth removal.Choosing two points with the same height after unwrapping the interferogram,and according to the relationship between the baseline and the target point height without knowing the absolute InSAR phase value or the rela...