CMOS APS噪声对星斑质心定位精度的影响  

CMOS APS Noise Effect on Position Accuracy of Star Tracker

作　　者：史少龙 尹达一[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]中国科学院大学,北京100049

出　　处：《光电工程》2013年第6期11-16,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(40776100)

摘　　要：CCD作为星敏感器探测器的技术已经比较成熟,但其瓶颈限制也日渐显露。本文以IBIS5-B-1300A探测器为例,具体分析CMOS APS各种噪声对星敏感器星像质心定位精度的影响,在理论上分析CMOS探测器所能达到的质心定位精度上限,并通过建模仿真验证理论分析结果,得出弥散斑束腰宽度为0.7,开窗大小为5×5时质心算法精度最高,固定模式噪声(FPN)对质心定位精度影响最大等结论,为星敏感器探测器的选型以及提高系统星点定位精度的潜力提供理论上的依据和支持。The technology of CCD as a star sensor starlight detector has been very mature,but the bottleneck is becoming exposed.On the basis of parameters of IBIS5-B-1300A,the article analyzes CMOS APS noise effects on position accuracy of star sensor,obtains the maximum star position accuracy which a CMOS APS sensor can achieve and verifies the theoretical analysis results through modeling and simulation.Then two conclusions are drawn.First,when gauss dispersion radius is 0.7 and the windows size is 5×5,we can obtain optimized subpixel accuracy;Second,Fixed Pattern Noise （FPN） has the greatest effect on the accuracy of centroid algorithm.This article provides a theoretical basis and support for the selection of the starlight detector for a star sensor system.

关 键 词：星敏感器 CMOS APS IBIS5-B-1300A 质心算法 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]