Saturation Effect at Passive Location of Gas-Aerosol Cloud

Authors: Sadovnikov R.N., Kudymova I.V. Published: 12.04.2017
Published in issue: #2(71)/2017  
DOI: 10.18698/1812-3368-2017-2-60-69

Category: Physics | Chapter: Optics  
Keywords: emergency emission, identification of dangerous substance, gas-aerosol cloud, absorption spectrum, spectro-radiometer

The study tested a two-component cloud containing an aerosol and gas component, which is necessary to identify by spectroradiometric method. We analyzed the joint disturbing action on identification of aerosol radiation scattering and the transmission spectrum saturation outside of the characteristic absorption lines. We obtained analytical solutions for specific equations of the passive cloud location in the infrared wavelength range. The study shows that each equation can have two solutions. The solutions give the minimum and maximum concentrations of the gaseous component, when it is possible to identify it in the presence of the available aerosol concentrations. We obtained an asymptotic solution corresponding to the case when at the concentration of gas components there occurs saturation of only characteristic absorption lines. The solution shows the limit value of the aerosol concentration, when it is possible to identify the gas component for the existing signal/noise ratio of the used spectroradiometer.


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