In-lab calibration of space-borne differential optical absorption spectrometer

ZHAO Min-Jie; SI Fu-qi; JIANG Yu; ZHOU Hai-Jin; WANG Shi-mei; LIU Wen-qing

doi:10.3788/OPE.20132103.0567

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In-lab calibration of space-borne differential optical absorption spectrometer

更新时间：2020-08-12

- In-lab calibration of space-borne differential optical absorption spectrometer
- Optics and Precision Engineering Vol. 21, Issue 3, Pages: 567-574(2013)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132103.0567
  CLC： O433.1
- Received：27 August 2012，
  
  Revised：19 October 2012，
  
  Published Online：20 March 2013，
  
  Published：15 March 2013
- 稿件说明：
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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.

摘要

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。

Abstract

A spaceborne 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 pushbroom 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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references

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