The principle and state research on gas identification method for long-wave infrared hyperspectral imaging

The principle of Gas Identification Method for Long-Wave Infrared Hyperspectral Imaging based FTIR was described in detail． The method of spectral data preprocessing and calibration，radiation transfer mode， algorithm of identifying and concentration retrieving of chemical gas，the detection limit and detection distance were analyzed． The development situation of passive IR remote sensing for chemical gas cloud detection technique was investigated，as well as the key parameters of them．