色散型推扫成像光谱仪在轨动态成像建模与分析  

Modeling In-Orbit Dynamic Imaging of Dispersive Push-Broom Spectrometer and Analyzing the Effect of Satellite Vibration on Imaging Spectrum

作　　者：王晓燕[1] 唐义[1] 唐秋艳[1] 倪国强[1] 

机构地区：[1]北京理工大学光电成像技术与系统教育部重点实验室,北京100081

出　　处：《北京理工大学学报》2012年第3期291-295,共5页Transactions of Beijing Institute of Technology

基　　金：国家"九七三"计划项目(2009CB724005);国家自然科学基金资助项目(40804048);国家"八六三"计划项目(2007AA12Z101;2009AA01Z225)

摘　　要：为研究卫星振动对色散型推扫成像光谱仪工作的影响,根据仪器的光学原理和在轨工作过程,建立了其在轨动态光谱成像模型.通过对成像过程的分解分析,导出了色散型光谱仪光谱成像与卫星姿态角振动的映射关系和各个掺杂光谱在混合光谱中的权重系数,并根据该映射关系进行了仿真.结果表明卫星振动使得原始光谱在混合光谱中所占的权重最小达到0.2以下,光谱混叠严重.To investigate the effect of satellite vibration on dispersive push-broom imaging spectrometer,on the basis of its optical principle and operational process,the in-orbit dynamic spectral imaging model of the spectrometer was established.By the aid of decomposing imaging process,the mapping relation between imaging spectrum of spectrometer and satellite attitude vibration could be found.Also the weight coefficients of all spectrums doping in mixed spectrum were obtained.The simulation results show that,caused by satellite vibration,the weight coefficient of original spectrum doping in mixed spectrum would reduce to less than 0.2,which implies the spectral aliasing is very serious.

关 键 词：色散光谱仪 卫星姿态 权重系数 光谱 

分 类 号：O436[机械工程—光学工程]