Algorithm of absorption spectrum for remote sensing on gaseous contaminant by FTIR spectrometer

Fourier transform infrared technology has been widely used for remote sensing, which can monitor the target without disturbing, measure different elements at the same time and in large-scale. Because of the advantages of the technology, FTIR spectrometer has been developed for remote sensing. For remote sensing on the target, the three radiant models are established according to whether the target is full of eye field. Based on the three models, a portable FTIR spectrometer developed by D&P is used for detecting target (cloud and background) on real-time. The detecting results with different spectrum algorithm and spectral emissive algorithm are analyzed, and the absorption spectrum of the cloud without background is obtained. The results of the experiments are given, and it indicates that different spectrum algorithm is more accurate than spectral emissive algorithm.