Experimental study on remote sensing observation of extinction coefficient of smoke aerosols

Forest fires and other combustions produce many particulate matter smoke aerosols. The study of optical properties is significant for smoke recognition, remote sensing image correction, etc. To obtain the extinction coefficient of biomass combustion, this study adopts the remote sensing simulation experimental observation method, based on scattering-absorption theory and Bouger-Lambert’s law, establishes the correlation between the extinction coefficient and transmittance of smoke aerosols, and conducts experimental observations under different background objects and different field angles of view, realizes the inversion of the extinction coefficient based on the least-squares regression analysis method, and determines the value and change law of the extinction coefficient of smoke aerosol. The results show that the relationship between the transmittance and concentration of smoke aerosols in the visible light-near-infrared band is in line with the Bouger-Lambert law. The extinction coefficients of different observation field angles and material backgrounds have consistent value rules. The extinction coefficient of the visible light band is more significant in general, and the peak occurs near 700nm.