Numerical statistical simulation of terahertz radiation propagation in cloudiness
E.G. Kablukova1, B.A. Kargin1,2, A.A. Lisenko3,4, G.G. Matvienko3,4, E.N. Chesnokov5
1Institute of Computational Mathematics and Mathematical Geophysics of the Siberian Branch of the RAS, 6, Ac. Lavrentieva ave., 630090, Novosibirsk, Russia
2Novosibirsk State University, 2, Pirogova Str., Novosibirsk, 630090, Russia
3V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
4National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050,Russia
5V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, 3 Institutskaya str., 3, 630090, Novosibirsk, Russia
Keywords: terahertz range, remote sensing, method Monte Carlo, local estimates
Abstract
The numerical estimates of the time distribution of the terahertz LIDAR based on the Novosibirsk Free Electron Laser radiation reflected by the lower cloudiness boundary are obtained by Monte Carlo method taking into account specific initial and boundary geometrical optical conditions, the cloudiness type, and water vapor attenuation along the sensing path. The location signal structure is analyzed as dependent on the multiple scattering background, wavelengths, water vapor concentration in the atmosphere. It is shown that intensity gradient of the reflected signal grows with the attenuation coefficient. Ratios between the contributions of single and multiple scattering in the echo signal structure are estimated depending on the optical depth of sensing.
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