大气痕量气体差分吸收光谱仪地面数据评价软件设计

Design of Ground Data Evaluation Software for Atmospheric Trace Gas Differential Absorption Spectrometer

大气痕量气体差分吸收光谱仪通过探测地球大气或地表反射、散射的紫外/可见光,利用差分吸收光谱技术来反演大气中痕量气体的分布和变化.在地面对大气痕量气体差分吸收光谱仪完成实验室定标以验证其性能和可靠性,为大气痕量气体差分吸收光谱仪的数据处理提供支持.为快速处理光谱仪定标数据,研制了相关的光谱辐射定标软件.定标软件基于C++语言,在Windows平台上开发,实现数据定标和多维度展示定标数据.其中光谱定标采用多项式拟合算法,光谱分辨率采用Gauss拟合算法.辐射定标包括绝对辐射定标和相对辐射定标,绝对辐射定标求取辐射定标非稳定性和非线性,相对辐射定标求取相对辐射校正系数和不确定度.结果表明软件运行良好,能够完成大气痕量气体差分吸收光谱仪地面光谱定标、辐射定标数据的处理.

Through acquiring high accurate UV/Vis radiation scattered or reflected by air or earth surface,atmospheric trace gas differential absorption spectrometer can monitor distribution and variation of trace gases based on differential optical absorption spectrum algorithm. The laboratory calibration of the load is performed on the ground to verify the performance and reliability of the load and support the data processing of the load. In order to quickly process load calibration data, spectral calibration and radiation calibration software was developed. Calibration software is based on C++ language and developed on Windows platform to achieve data calibration and multi-dimensional display calibration data. Polynomial fitting algorithm is used in spectral calibration, while Gauss fitting algorithm is used in spectral resolution. Radiation calibration includes absolute radiation calibration and relative radiation calibration. Absolute radiation calibration is used to determine the instability and non-linearity of radiation calibration. Relative radiation calibrationis used to obtain relative radiation correction coefficients and uncertainty. The results show that the software runs well and is competent for the processing the load ground spectrum calibration and radiation calibration data.