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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
收稿日期:2012-08-27,
修回日期:2012-10-19,
网络出版日期:2013-03-20,
纸质出版日期:2013-03-15
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赵敏杰 司福祺 江宇 周海金 汪世美 刘文清. 星载大气痕量气体差分吸收光谱仪的实验室定标[J]. 光学精密工程, 2013,21(3): 567-574
ZHAO Min-Jie SI Fu-qi JIANG Yu ZHOU Hai-Jin WANG Shi-mei LIU Wen-qing. In-lab calibration of space-borne differential optical absorption spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2013,21(3): 567-574
赵敏杰 司福祺 江宇 周海金 汪世美 刘文清. 星载大气痕量气体差分吸收光谱仪的实验室定标[J]. 光学精密工程, 2013,21(3): 567-574 DOI: 10.3788/OPE.20132103.0567.
ZHAO Min-Jie SI Fu-qi JIANG Yu ZHOU Hai-Jin WANG Shi-mei LIU Wen-qing. In-lab calibration of space-borne differential optical absorption spectrometer[J]. Editorial Office of Optics and Precision Engineering, 2013,21(3): 567-574 DOI: 10.3788/OPE.20132103.0567.
采用四通道凸面光栅成像光谱仪设计了星载大气痕量气体差分吸收光谱仪,该光谱仪用天底推扫方式探测地球地表或天空散射光信号,基于痕量气体对不同谱段光信息的指纹吸收和差分吸收光谱算法定量获取大气痕量气体分布。针对该光谱仪的大视场、宽谱段、高分辨率(光谱、空间)等特点,提出了相应的光谱定标和辐射定标方法,建立了定标系统,实现了对载荷的光谱定标和辐射定标,并对其定标的不确定度进行了分析。结果表明,载荷光谱定标不确定度为0.027 nm,辐射定标不确定度为2.96%,满足给定的技术指标要求,为载荷的定量反演提供了保证。
A spaceborne differential optical absorption spectrometer was designed on the basis of a four channel Offer imaging spectrometer with a convex grating. It could acquire high accuracy radiation scattered by earth surfaces or air in a nadir pushbroom mode
and could quantitatively obtain the trace gas distribution based on the fingerprint absorption of the trace gas at different spectral information and the differential optical absorption spectrum algorithm. According to the characteristics of large field
wide wavelength range
high spatial and spectral resolution of the spectrometer
the corresponding methods of spectral calibration and radiometric calibration were presented
and a calibration system was built. Then the spectral and radiometric calibrations of the spectrometer were realized
and the calibration uncertainty was analyzed. Experimental results show that spectral calibration uncertainty of the instrument is 0.027 nm and the radiation uncertainty is 2.96%. The calibration accuracy meets the given requirements and can provide a foundation for quantitatively inversion of the instrument.
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