Research on calibration method of instrument line shape for infrared radiometer
نویسندگان
چکیده
针对大口径干涉型红外光谱辐射计, 分析了不平行于主光轴的入射光, 对理想仪器线型函数的影响. 本文系统介绍了对仪器线型函数产生影响的截断效应、有限视场效应、离轴效应和离焦效应, 并通过HITRAN数据库对理想的水汽吸收光谱进行仿真, 建立了仪器线型函数误差与光谱畸变的定量关系. 根据仿真结果, 提出了因子权重校正算法. 利用水汽吸收的仿真数据对因子权重校正算法进行验证, 光谱漂移从0.51 cm–1降低到0.01 cm–1以下. 通过自研干涉型红外光谱辐射计对标准黑体的观测实验, 验证因子权重校正算法的准确性, 实测数据的光谱漂移从0.226 cm–1降低到0.012 cm–1, 校正后的光谱数据更为准确.
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ژورنال
عنوان ژورنال: Chinese Physics
سال: 2021
ISSN: ['1000-3290']
DOI: https://doi.org/10.7498/aps.70.20210302