光学学报, 2014, 34 (7): 0728002, 网络出版: 2014-06-13
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
遥感 光谱定标 多光谱相机 退化效应 光谱靶标 remote sensing spectral calibration multi-spectral camera spectral response function degradation effect spectral targets
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。
Abstract
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.
李鑫, 张黎明, 陈洪耀, 徐伟伟. 光学遥感器光谱响应特性在轨评估中的光谱靶标设计[J]. 光学学报, 2014, 34(7): 0728002. Li Xin, Zhang Liming, Chen Hongyao, Xu Weiwei. Design of Spectral Target Used to Assess the Degradation of Multi-Spectral Sensor in Flight[J]. Acta Optica Sinica, 2014, 34(7): 0728002.