干涉合成孔径雷达基线误差最优化校正方法

Optimal correction method for baseline error of interferometric synthetic aperture radar

针对传统干涉合成孔径雷达基线校正方法没有遍历最大可能误差范围内的全部坐标,导致最大偏差值和均方根误差大的问题,提出干涉合成孔径雷达基线误差最优化校正方法。根据合成孔径雷达与基线的定义,构建基线模型,获取初步基线值;确定校正对象并计算相位差,遍历最大可能误差范围内的全部坐标,得到与真实阵列坐标重合的坐标值,获取固定的相位差,校正干涉合成孔径雷达基线误差。实验结果表明,所提方法能够有效地降低最大偏差值和均方根误差,完成干涉合成孔径雷达基线误差的最优化校正。

Aiming at the problem that the traditional interferometric synthetic aperture radar baseline correction method does not traverse all coordinates within the error range,resulting in large maximum deviation and root mean square error,an optimal correction method for interferometric synthetic aperture radar baseline error is proposed in this paper.According to the definition of synthetic aperture radar and baseline,the baseline model is constructed to obtain the preliminary baseline value;Determine the correction object and calculate the phase difference,traverse all coordinates within the maximum possible error range,obtain the coordinate value coincident with the real array coordinates,obtain the fixed phase difference,and correct the baseline error of InSAR.Experimental results show that the proposed method can effectively reduce the maximum deviation and root mean square error,and complete the optimal correction of InSAR baseline error.