摘要
波段选择是导弹助推段天基红外探测系统设计首先需要解决的问题.无论是中心波长的确定,还是波段宽度的设定,都应有合理的依据.本文提出了导弹助推段天基探测的像面照度模型,并根据模型得到导弹助推段天基红外探测系统的目标与背景信杂比作为目标函数,利用信杂比的最大化作为波段宽度选择的依据,进行探测波段的选择.分析结果表明,以H2O,CO2吸收带2.7μm和4.3μm为作为红外探测系统的中心波长有其固有的合理性,不同的波段宽度选择将使信杂比产生显著变化.本文所建立的像面照度模型对遥感器设计和性能估计亦有重要意义.
Infrared band selection for boost-phase missile detection is fundamental to space based infrared system. Decision of central wavelength and band width of the infrared detecting band should be subject to some reasonable rules. A model for calculating the illumination of the image plane caused by missile and other various infrared radiations was proposed, and then the right waveband and the related central wavelength was got by using an object function of signal to clutter rate （SCR） in missile＇ s boost-phase. Results shows that absorption band of H2O, CO2 at 2. 7μm and 4. 3μm are suitable to be selected as detecting band, and SCR varies largely with the width of detecting band. The radiometry model can also be used as the design and performance evaluation for many infrared remote instruments.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第6期425-428,共4页
Journal of Infrared and Millimeter Waves
基金
863创新基金(2003AA005029)资助项目
关键词
吸收带
红外探测
像面照度
absorption band
infrared detecting
image plane illumination
