摆扫式航空遥感器采用线阵时间延迟积分电荷耦合器件(TDI-CCD)作为成像探测器,对运动的目标成像时,在积分时间内,飞行与时间延迟积分扫描二维空间上都存在拖影现象,降低了遥感系统的调制传递函数,导致图像的分辨率下降。针对上述现象,分析了像拖影产生的原因并建立了数学模型,定量分析了像拖影对调制传递函数的影响,通过调制传递函数与图像分辨率之间的关系,建立了像拖影与图像分辨率之间的映射,并采用主动补偿的方法进行像拖影补偿。利用动态目标发生器、平行光管以及三轴摇摆台模拟飞行环境,对理论分析结果进行实验验证。实验结果表明,当控制精度在理论允许的误差范围内时,图像拖影现象得到了明显改善,提高了图像的分辨率。 Swing-swept airborne remote sensor using linear time-delay integrated charge-coupled device (TDI-CCD) as the imaging detector, imaging the target of the movement in the integral time, flight and time delay integral scanning two-dimensional space there is a drag Shadow phenomenon, reducing the modulation transfer function of remote sensing system, resulting in the resolution of the image decreased. In view of the above phenomenon, this paper analyzes the causes of smear and builds a mathematical model to quantitatively analyze the influence of image smear on the modulation transfer function. By modeling the relationship between transfer function and image resolution, Image resolution between the mapping, and the use of active compensation methods such as smear compensation. The dynamic target generator, collimator and three-axis swing table are used to simulate the flight environment, and the theoretical analysis results are verified by experiments. The experimental results show that when the control accuracy is within the theoretical error range, the phenomenon of image smear is obviously improved, and the resolution of the image is improved.