地基干涉合成孔径雷达的大气相位补偿研究

Research on atmospheric phase compensation for ground-based interferometric synthetic aperture radar

针对地基干涉合成孔径雷达在监测有较大形变发生场景时,采用常规大气相位补偿方法存在较大误差的问题,提出了一种GB-InSAR在形变场景下的大气相位补偿方法。利用模糊C均值聚类算法并参考“3σ”法则选出稳定PS点;通过误差逆传播网络来预测所有PS点的大气相位,进而得到补偿之后的相位。实验结果表明:在形变场景下,采用本文所提方法可以准确地选出稳定PS点,有效补偿稳定PS点的大气相位并保留形变PS点的形变信息,提高了形变场景下大气相位的补偿精度。

For the ground-based interferometric synthetic aperture radar(GB-InSAR)when monitoring the scene with large deformation,the conventional atmospheric phase compensation method has the problem of large error,this paper proposes an atmospheric phase compensation method for GB-InSAR in deformation scenarios.First,the fuzzy C-means(FCM)clustering algorithm is used to select stable PS points with reference to the“3σ”rule;then the error back propagation(BP)network is used to predict all atmospheric phase of PS point,and then the phase after compensation is obtained.The experimental results show that in the deformation scene,the method proposed in this paper can accurately select the stable PS point,effectively compensate the atmospheric phase of the stable PS point and retain the deformation information of the deformed PS point,improving the compensation accuracy of atmospheric phase in deformation scenarios.