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基于散射光的被动差分吸收(DOAS)技术利用气体的特性吸收谱线可实现对不同大气污染气体的定量测量,介绍了一种基于成像光谱仪的光学遥感系统,该系统运用被动DOAS原理实现了对大气污染气体的二维成像测量,并报道了该系统对实验室样品池一维测量与城市道路上方NO2组分的成像测量实验.基于成像光谱仪的被动DOAS系统利用太阳散射光可获取垂直方向一维的光谱信息,结合扫描装置,便可实现对污染气体的二维成像解析.
The technology of passive differential absorption (DOAS) based on scattered light makes it possible to quantitatively measure the gas with different atmosphere by using the characteristic absorption line of gas. An optical remote sensing system based on imaging spectrometer is introduced. The system uses the passive DOAS principle Atmospheric imaging gas two-dimensional imaging measurement, and reported the system of laboratory sample cell one-dimensional measurement and urban roads above the NO2 component of the imaging measurement experiments.According to the imaging spectrometer passive DOAS system can be obtained using the sun’s scattered light vertical direction of a Dimensional spectral information, combined with the scanning device, can be realized on the two-dimensional imaging of contaminated gas.