中文摘要：

为了研究时变湍流对跟瞄过程中动态平移的光斑定位和跟踪精度的影响，采用改进的逆傅里叶变换方法构造了体现大气湍流特性的随机相位屏，模拟仿真分析了不同强度时变湍流影响下光斑动态平移时探测器感受到的光斑质心与光斑实际质心之间的跟踪偏差、定位偏差与光斑在探测器上位置之间的关系，以及湍流强度对光斑质心定位精度的影响，给出了统计偏差曲线。结果表明，在时变大气湍流的影响下，光斑整体动态平移过程中实际质心的移动距离与接收端探测器感受到的光斑质心移动距离存在一个跟大气湍流强度成正比的偏差。动态平移过程中光斑质心的平移跟踪偏差与定位精度、大气湍流强度以及光斑在接收终端探测器上的位置有关。

英文摘要：

In order to study the influence of time-varying turbulence to facular orientation precision when the facula is moving during pointing and tracking process, a random phase screen is generated by using modified inverse Fourier transform to simulate the atmospheric turbulence. And then the orientation deviation of the facular barycenter, the relation between the deviation and the facular position in the detector and the orientation precision of the facula are analyzed under different atmospheric turbulence intensities. The results indicate that there is a deviation between actual translational amount of the facular barycenter and that of the barycenter detected by the charge-coupled device in the presence of time-varying atmospheric turbulence, and it relates with the atmospheric turbulence intensity. And the orientation precision relates with both the atmospheric turbulence intensity and the facular position in the detector.