An algorithm based on a model of constancy of temperatures on the path and in a cloud of contaminants is proposed for solving the problem of identifying and determining contaminant concentrations by means of a Fourier spectroradiometer. The main problems of the procedure for processing the initial interferograms and the experimental spectra are considered, including those with small radiance contrasts of the paths. The experimental results of field tests of a spectroradiometer based on the proposed algorithm are presented.
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