Modeling of laser pulse propagation in clouds taking into account multiple scattering

Tatiana Russkova; Nadezhda Kan

doi:10.1117/12.2645067

7 December 2022 Modeling of laser pulse propagation in clouds taking into account multiple scattering

Tatiana Russkova, Nadezhda Kan

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123411J (2022) https://doi.org/10.1117/12.2645067
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

The work proposes an original algorithm of the Monte Carlo method for simulating the propagation of laser pulses in a cloudy atmosphere taking into account all scattering orders. The results of studying the features of echo signal propagation through the cloud represented by semi-infinity homogeneous layer are discussed. The contribution of multiple scattering to a ground-based and a spaceborne monostatic lidar returns from clear atmosphere obscured by cumulus, stratus or cirrus clouds is assessed at the wavelength of 0.532 μm. The significant presence of multiple scattering in lidar returns and its dependence on the characteristics of the sounded clouds are demonstrated. High anisotropy of scattering in the forward direct ion by polydispersions of large nonspherical ice crystals is the basis of a tangible effect of multiple scattering for small values of the lidar receiver field of view. The radiation scattered by the crystal particles within a narrow cone around the forward direct ion is predominant and is greater than the corresponding values for scattering on water droplets. For cumulus and stratus clouds, the contribution of triple-scattered photons and higher to the total echo signal increases with increasing field of view of the receiver. The magnitude of multiple scattering effects is also seen to be largely determined by the optical depth across the receiver field of view at the cloud.

Citation Download Citation

Tatiana Russkova and Nadezhda Kan "Modeling of laser pulse propagation in clouds taking into account multiple scattering", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123411J (7 December 2022); https://doi.org/10.1117/12.2645067

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