干涉成像光谱仪受卫星振动影响的仿真与分析  

Simulation and Analysis of Interference Imaging Spectrometer Influenced by Satellite Vibration

作　　者：唐义[1] 唐秋艳[1] 王晓燕[1] 曹玮亮[1] 王静[1] 

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

出　　处：《光谱学与光谱分析》2011年第11期3149-3153,共5页Spectroscopy and Spectral Analysis

基　　金：国家重点基础研究发展计划(973)项目(2009CB724005);国家自然科学基金项目(40804048);国家高技术研究发展计划(863)项目(2007AA12Z101)资助

摘　　要：在干涉成像光谱仪扫描过程中,卫星姿态的不稳定性将严重影响光谱成像质量。针对该问题,在分析干涉成像光谱仪光谱成像退化机理的基础上提出了一种微分动态成像仿真方法,以此来模拟光谱成像退化过程。并提出了平均掺杂比的概念,通过它建立起卫星姿态俯仰、侧滚和偏航的运动参数与其对光谱成像影响之间的桥梁,详细推导了这两者之间的定量关系。以环境资源卫星提供的遥感数据为例进行了退化仿真,结果表明平台振动不仅影响光谱成像的空间分辨率,更会带来光谱失真,且相邻像元光谱差异较大的区域影响较大。通过仿真数据分析,对卫星姿态稳定精度提出了要求,给出了必须重视振动影响并需要采取相应补偿措施的姿态稳定度条件。During the spectral imaging course of interference imaging spectrometers,satellite platform＇s instability will bring serious impact on the imaging quality.Based on studying the degradation mechanism,a differential dynamic imaging simulation method is proposed here to simulate the process of spectral imaging degradation.And in this method,the mean ratio of doping is put forward,which combines the satellite motion parameters with the impacts on spectral imaging.And the quantitative relationship between them is deduced in detail.With environmental resources satellite as an example,the degraded result is simulated,showing that the vibration affects the spectral imaging not only in the spatial resolution but also in spectrum,with the region of rich species having more serious influence.And through the simulation and analysis,the satellite attitudes＇ stability is requested accurately,below which the impacts of satellite vibration on spectral imaging should be significant and it＇s necessary to adopt corresponding compensation measures.

关 键 词：仿真 干涉成像光谱仪 卫星振动 平均掺杂比 

分 类 号：TH744.1[机械工程—光学工程]