摘要
针对在以太阳散射光为光源的被动差分吸收光谱(DOAS)系统中,由于Ring效应的影响,而导致被动DOAS的解析误差。根据Ring效应的产生机理,本文提出把散射光分为弹性散射与非弹性散射两部分,导出Ring光谱的计算公式。利用该公式提取Ring效应吸收光谱,并把其和痕量气体一道参与拟合,去除Ring效应的影响。实验结果表明该方法有效地去除了Ring效应的影响,提高了被动DOAS技术反演精度,进一步促进了该技术的发展与应用。
The passive Differential Optical Absorption Spectroscopy（DOAS） using sun scattered light can perform observation of local total volume of trace gases.To reduce the effect of Ring effect on passive DOAS system,the mechanisms of Ring effect were analyzed in this paper,and the scattered light was divided into elasticity and non-elasticity scattering.The expressions of Ring effect are educed.The calculated Ring is retrieved together with other atmospheric components.Therefore,its effect on the measurement could be restricted to minimum in DOAS system.The experimental result shows that the accuracy of DOAS system is improved.
出处
《光电工程》
CAS
CSCD
北大核心
2010年第7期49-52,共4页
Opto-Electronic Engineering
基金
安徽省自然科学基金(090412028)
教育部科学技术研究资助项目(209057)
