摘要
为了满足地球同步轨道(Geosynchronous Orbit,GEO)空间目标的探测要求,克服长时间曝光CCD像元出现饱和溢出的情况,提出使用多帧连续曝光图像叠加的方法,增加图像的存储范围,同时提升目标的信噪比,保证系统的探测能力.实验结果表明,利用10帧连续图像叠加的方法,可以有效消除像元饱和的情况,提升目标信噪比约3.2倍,提升探测能力近似2.5星等,且序列图像的底片常数精度可靠,用底片常数的均值计算目标位置,精度符合要求.结果验证了使用图像叠加方法探测GEO目标的可行性.
To meet the needs of detecting GEO（Geosynchronous Orbit）space objects, and prevent the saturation of CCD pixels with long exposure time,a method of stacking series of images with short exposure time is presented.Using the method,the store range of images is enlarged,and the signal to noise ratio（SNR）is promoted,and hence the detection ability of the whole system is improved.The results of experiments demonstrate that the saturation of pixels is eliminated effectively,and the SNR is increased by 3.2 times,and the detection ability is increased by 2.5 magnitude when 10 seriate images are stacked.The location accuracy of stars satisfies the requirement,and using the mean plate parameters for astronomical orientation is reliable.At last the efficiency of the method is proved.
出处
《天文学报》
CSCD
北大核心
2012年第3期249-258,共10页
Acta Astronomica Sinica
基金
国家自然科学基金项目(11033009,10903030)资助
关键词
航天器
技术:图像处理
space vehicles
techniques：image processing
