【摘要】 近场干涉SAR测高时由于球面波影响，雷达不同高度获得的SAR图像发生形变，且在场景的不同区域形变不一致，这为干涉测高时的亚像素级图像配准及相位解模糊带来困难。本文从寻找图像不变形及相位不模糊的边界基线长度出发，分别找到图像不变形及相位不模糊的边界基线，利用近场成像导轨装置实现多航过同一场景的数据录取，解算得到目标的高度信息。更多还原

【Abstract】 During near-field interferometric SAR height measurement, the SAR images obtained at different heights are deformed due to the spherical wave effect, and the deformation varies in different regions of the scene. This poses challenges for sub-pixel level image registration and phase unwrapping during interferometric height measurement. This paper starts by finding the boundary baseline lengths that are free from image deformation and phase ambiguity. It identifies the boundary baselines for both image deformation and phase ambiguity. A near-field imaging rail device is used in a test to acquire data for a same scene over multiple passes, thereby calculating the height information of the targets.更多还原