利用单脉冲激光雷达跟踪象的质心,可以实现对目标的角跟踪。使用不相干的光计数探测器阵列来传感象的辐照度的分布,这种运算提供了象质心、大小和取向的估计值。对于光学上粗糙和光滑的大目标,得出质心的平均值及其变化和第二矩与相干性、目标范围、分辨率和积分时间有关。本文讨论了由象与背景辐照度产生的散粒噪声,和激光光斑对精度的限制。 Using monopulse Lidar to track the centroid of the image, angular tracking of the target can be achieved. The use of an incoherent light-counting detector array to sense the distribution of irradiance of an image provides an estimate of centroid, size, and orientation. For optically coarse and smooth large targets, the average of the centroid and its variation are derived as a function of the second moment and coherence, target range, resolution, and integration time. This article discusses shot noise caused by image and background irradiance, and the limitations of laser spot accuracy.