Method and system for detecting ground fire through low-altitude unmanned aerial vehicle

The invention belongs to the technical field of atmospheric monitoring, and particularly discloses a method and system for detecting ground fire through a low-altitude unmanned aerial vehicle, and the method comprises the steps: obtaining the spectral line intensity and the spectral line shape, carrying out the integral calculation of the spectral line intensity and the spectral line shape, obtaining the absorption coefficient of a spectral line, carrying out the calculation, obtaining the transmittance of H2O and CO2, multiplying the transmittance of H2O by the transmittance of CO2, obtaining the transmittance of atmospheric molecules, calculating the extinction optical thickness tau ([lambda]) of aerosol particles in the atmosphere according to a scattering coefficient ksca and an extinction coefficient kxt of the aerosol particles in the atmosphere, further obtaining the transmittance of the aerosol, and combining the transmittance of the atmospheric molecules to obtain an atmospheric radiation transfer eq