Renshi LI, Hao DENG, Ruifeng KAN, Chenguang YANG, Hao LIU, Zhenyu XU, Xianyi ZHANG. Inversion method of atmospheric CO2 vertical profiles based on near-infrared laser heterodyne spectroscopy[J]. Journal of Atmospheric and Environmental Optics, 2025, 20(2): 158

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- Journal of Atmospheric and Environmental Optics
- Vol. 20, Issue 2, 158 (2025)

Fig. 1. The schematic diagram of principle of laser heterodyne detection

Fig. 2. High resolution laser heterodyne detection system for solar radiation

Fig. 3. Interference spectrum of F-P etalon and linear function of system instrument. (a) Interference spectrum of etalon;(b) instrument linear function

Fig. 4. The flow chart of retrieving atmospheric CO2 profiles

Fig. 5. The prior profiles of atmospheric pressure and temperature at various altitude

Fig. 6. The fitting results of atmospheric CO2 heterodyne spectra (a) and corresponding fitting residuals (b)

Fig. 7. The prior vertical profiles and retrieved vertical profiles of CO2

Fig. 8. Sum of average kernel functions for CO2 (a) and total error of profile retrieval (b)

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