spot-size error

基本解释

The spot shape and size are determined to minish the sub-pixel centroiding error caused by the distortion of the point spread function due to the pixel sampling effect of the CMOS APS.
确定光斑形状和大小的依据是，减小由于探测器像元对光斑能量分布的采样导致点扩散函数变形，从而引起的利用亚像元技术求星像中心的计算误差。
Based on the model of star point and error calculation mode, the deviation of sub-pixel centroiding due to the size of window, the variance of spot and the noises of APS are analyzed theoretically.
根据星点模型和质心误差计算模型量化分析了窗大小、星点模型方差、噪声源对APS亚像素质心定位的影响。