Light Scattering by Particles with Arbitrary Shape in the Vicinity of the Backward Scattering Direction within Geometrical Optics Approximation

Victor Shishko,Dmitry Timofeev,Alexander Konoshonkin,Anatoli Borovoi,Natalia Kustova,D Liu,B Gross,F Moshary,Y Wang,Y Wu

doi:10.1051/epjconf/202023708012

Victor Shishko, Dmitry Timofeev + Show 8 more

Open Access

https://doi.org/10.1051/epjconf/202023708012

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Abstract

The work presents the solution for the light scattering problem by arbitrarily-shaped particles in the vicinity of the backward scattering direction. The solution was obtained within the framework of the geometrical optics approximation. The refractive index was equal to 1.3116. It was shown that the general contribution of scattering light for arbitrarily-shaped particles in the vicinity of the backscattering direction consists of the specular reflection of the particles and two types of non-specular optical beams. It is shown that the optical characteristics of the ice particles with arbitrary shapes correspond to experimental data.

Highlights

Despite the fact that attempts to solve the inverse problem of laser polarization sensing of ice clouds have been made for a long time [1], this problem has not been solved yet
The main difficulty in interpreting experimentally obtained lidar data is the absence of an effective method for solving the direct problem of light scattering on ice crystal particles typical for real cirrus clouds
Zuev Institute of Atmospheric Optics SB RAS [2]. This method is effective for solving the direct problem of light scattering by crystal particles of cirrus clouds ranging in size from 10 to 1000 μm [3]

Summary

INTRODUCTION

Despite the fact that attempts to solve the inverse problem of laser polarization sensing of ice clouds have been made for a long time [1], this problem has not been solved yet. The main difficulty in interpreting experimentally obtained lidar data is the absence of an effective method for solving the direct problem of light scattering on ice crystal particles typical for real cirrus clouds. Characteristics, which is not observed in experiments. To overcome this discrepancy, some more complicated shapes of the ice crystals should be considered. Some more complicated shapes of the ice crystals should be considered In this contribution, the differential cross sections for arbitrarily shaped particles have been calculated within the geometrical optics approximation

RESULTS

METHODOLOGY

CONCLUSION