Vol. 14, issue 09, article # 6

Kataev M. Yu. Methodical principles of processing the data of laser open-path gas analysis. // Atmospheric and oceanic optics. 2001. V. 14. No. 09. P. 712-717. PDF
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Principal methodical problems associated with reconstruction of gas composition of the atmosphere from the data of laser open-path gas analysis by the differential absorption lidar (DIAL) method are considered. Main factors affecting the accuracy of the gas concentration reconstruction, such as inadequate knowledge of absorption coefficients, aerosol extinction coefficients, continuum absorption models, etc., are determined. The problems of selection of optimal spectral sensing channels and detection of gases are examined as well. The methods of taking into account the finite width of a laser radiation line and its effect on the accuracy of reconstruction of gas concentration are demonstrated. Specialized software for solution of these problems is described.