当载机的理想航迹与实际航迹存在偏差时,方位上分布不同的目标对应的运动误差历程具有方位空变性。结合传统子孔径频域补偿的思想,提出了一种新的方位空变误差精确补偿方法。该方法采用时域卷积替代频域点乘,在回波方位的慢时间域逐点对不同时刻、不同方位角目标的运动误差进行精确补偿。经仿真和实测数据验证表明,本文所提方法可在精确补偿方位空变误差的同时,能有效克服传统补偿方法存在的方位栅瓣问题,并具有运算复杂度低、利于工程实现的优点。 When the ideal trajectory of the carrier is deviated from the actual trajectory, the motion error history corresponding to the target with different azimuth distribution has azimuthal variability. Combined with the idea of ​​traditional sub-aperture frequency domain compensation, a new precise compensation method of azimuth error-free error is proposed. In this method, the time-domain convolution is used instead of the frequency-domain multiplication, and the motion error of the target at different moments and azimuths is accurately compensated point by point in the slow time domain of the echo azimuth. The simulation and measured data show that the proposed method can accurately compensate the azimuthal error of the azimuth and can effectively overcome the azimuth grating flap problem existing in the traditional compensation methods and has the advantages of low computational complexity and good engineering realization.