A Real Time Evaluating Method of Aerosol Extinction Coefficients For Multi Laser Wavelengths

Abstract

Abstract A new real-time evaluatting method is proposed for multi laser wavelengths’ extinction coefficients of atmospheric aerosol. The back scattered signal measured by single wavelength lidar is utilized together with complex aerosol model of Fascode. The unique features of this method are discussed in detail. Atmospheric aerosol extinction coefficients inversely calculated by this method are compared with real time measurements’ data. The results show that it is feasible to evaluate the signatures of infrared atmospheric propagation with reasonable accuracy. The real time atmospheric correcting model is established by the method for aerosol extinction coefficients at different wavelengths without absorption of water vapor. The profile of atmosperic aerosol extinction coefficients for many special wavelengths selected between the spectrum from visible to infrared is evaluated by using both the inversion methd and the data measured by 0.532 colon lidar. The results can be used for atmospheric correction for the laser applications from ground to high-level or vice versa.