星载大气痕量气体差分吸收光谱仪光谱图像校正方法研究  

Spectral Image Correction Method for Space-Born Differential Optical Absorption Spectrometer

作　　者：赵敏杰[1] 司福祺[1] 陆亦怀[1] 王煜[1] 汪世美[1] 江宇[1] 周海金[1] 刘文清[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,安徽合肥230031

出　　处：《光学学报》2015年第12期295-301,共7页Acta Optica Sinica

基　　金：国家自然科学基金(41275037);安徽省杰出青年科学基金(1308085JGD03)

摘　　要：星载大气痕量气体差分吸收光谱仪是一种宽视场、高分辨率的成像光谱仪。光谱弯曲和条纹的存在干扰光谱仪的成像质量,影响光谱数据的反演精度,需要在轨对光谱图像进行校正。为此,在地面对仪器的全视场光谱图像校正算法进行研究。通过图像合并方法获得仪器全视场光谱图像,并对光谱图像的光谱弯曲和条纹进行详细的分析,结合仪器的特点提出相应的光谱弯曲校正算法和均匀性校正算法。光谱图像校正结果表明,光谱图像的光谱弯曲、横条纹和斜条纹得到了较好的校正,验证了光谱校正算法的可行性,为仪器在轨光谱图像校正提供了依据。Space-born differential optical absorption spectrometer is an imaging spectrometer with wide field of view and high resolution. Spectral curve and stripe noise interferes the image quality, influences the inversion accuracy, and thus needs to be corrected on orbit. A study on full field-of-view spectral image correction method is completed on ground. The full field-of-view spectral image is obtained by using image combination, and then the spectral image is analyzed in detail. Based on the spectrometer characteristics, a spectral curve and stripe noise correction method is proposed. The correction results show that the spectral curve, cross stripe and inclined stripe are well corrected, demonstrating the feasibility of the proposed correction method and providing the basis for onorbit spectral image correction.

关 键 词：光谱学 光谱图像 成像光谱仪 光谱弯曲 图像条纹 

分 类 号：O433[机械工程—光学工程]