VARIANCE OF SCATTERED RADIATION INTENSITY FLUCTUATIONS OF A FOCUSED LASER BEAM (0.63 ΜM) IN THE ATMOSPHERIC GROUND LAYER DURING PRECIPITATION
Authors:
1.
V E Zuev Institute of Atmospheric Optics SB RAS
Type:
Сonference article
Pages:
from 71
to 74
Published:
17.08.2026
Subject area:
UDC 504.3
UDC 533.9.082.5
UDC 551.577
UDC 533.9.082.5
UDC 551.577
Language:
Russian
Keywords:
normalized variance of intensity fluctuations, scattered radiation, focused beam, wind speed, scattering coefficient
Funding:
The work was carried out within the framework of the state task of the IOA SB RAS.
Abstract:
An experimental study was conducted to examine the influence of wind speed, its perpendicular component to the path, and the scattering coefficient on the normalized variance of scattered radiation intensity fluctuations of a focused laser beam during precipitation. It was found that the normalized variance of intensity fluctuations of scattered radiation from a focused laser beam decreases with increasing scattering coefficient in rain and increases in fine and coarse (flake) snowfalls. In drizzle, there is no dependence on the scattering coefficient. The normalized variance does not depend on wind speed or its component perpendicular to the path in rain or coarse snowfalls. In drizzle, the variance decreases with increasing wind speed and its component perpendicular to the path. In fine snowfalls, the normalized variance increases with increasing wind speed and decreases with increasing component perpendicular to the path.
An experimental study was conducted to examine the influence of wind speed, its perpendicular component to the path, and the scattering coefficient on the normalized variance of scattered radiation intensity fluctuations of a focused laser beam during precipitation. It was found that the normalized variance of intensity fluctuations of scattered radiation from a focused laser beam decreases with increasing scattering coefficient in rain and increases in fine and coarse (flake) snowfalls. In drizzle, there is no dependence on the scattering coefficient. The normalized variance does not depend on wind speed or its component perpendicular to the path in rain or coarse snowfalls. In drizzle, the variance decreases with increasing wind speed and its component perpendicular to the path. In fine snowfalls, the normalized variance increases with increasing wind speed and decreases with increasing component perpendicular to the path.
Keywords:
normalized variance of intensity fluctuations, scattered radiation, focused beam, wind speed, scattering coefficient
normalized variance of intensity fluctuations, scattered radiation, focused beam, wind speed, scattering coefficient
1. Vostrecov N. A., Zhukov A. F. Fluktuacii intensivnosti rasseyannogo izlucheniya fokusirovannogo lazernogo puchka v prizemnom sloe atmosfery. Ch. 1. Snegopad. Optika atmosfery i okeana. 1999. T. 12. № 08. S. 689-693.
