光学遥感器光谱响应特性在轨评估中的光谱靶标设计  

Design of Spectral Target Used to Assess the Degradation of Multi-Spectral Sensor in Flight

作　　者：李鑫[1,2] 张黎明[1,2] 陈洪耀[1,2] 徐伟伟[1,2] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学院通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《光学学报》2014年第7期253-260,共8页Acta Optica Sinica

基　　金：国家863计划(2012AA12A302-2);安徽省自然科学基金(12080805Qd74)

摘　　要：光学遥感器在轨运行期间,受温度变化、空间辐射等因素的影响,其光谱响应特性会产生变化,进而使目标物理量的测量值产生退化。以光谱靶标为检测参照,通过建立合适的退化模型,可以实现对遥感器光谱响应特性的在轨评估。为达到这一目的,需要针对遥感器的光谱响应函数设计出合适的光谱靶标,通过仿真模拟计算,得出了光谱反射率呈高斯模式的光谱靶标最适合进行在轨评估的结论,在轨实验结果初步验证了设计结果的正确性。When the multi-spectral sensor works in the space, it is affected by temperature variations, space radiation and other factors, which may produce changes in the spectral response characteristics. As a result, bias occurs in the physical measurements which cannot be corrected by radiometric calibration methods. With the help of spectral targets and appropriate degradation models, the degradation characteristics of the multi-spectral sensor can be assessed. To achieve this purpose, suitable spectral targets should be designed. Based on simulation experiments, it can be concluded that the targets with Gauss model spectral reflectance are the most suitable for on-orbit assessment, and the on-orbit experiment result verifies the conclusion above.

关 键 词：遥感 光谱定标 多光谱相机 退化效应 光谱靶标 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] O433.4[自动化与计算机技术—控制科学与工程]