Spectral calibration of atmosphere hyper-spectral resolution infrared sounder

In order to calibrate the full spectrum band and high precision of the atmosphere hyper-spectral resolution infrared sounder, by analyzing the working principle of the interference spectrometer and theoretically deducing the spectral drift factor, it was found that the full spectrum band calibration could be realized by the limited spectral position correction. Based on the wavemeter, the method of spectral calibration with continuously tunable laser as the test light source was adopted, and the cross calibration with high-precision gas cell system was used to verify the calibration accuracy. The experimental results show that the test precision of the spectral calibration by measuring the spectral drift factor is better than 0.004 cm⁻¹, which meets the calibration requirements of the high-precision spectrometer. The drift factor can be applied to the spectral calibration of the interference spectrometer.