Vol. 35, issue 03, article # 4

Abstract:

It is shown that the approximate Vorobyov formula linking the lidar returns with the intensity of optical turbulence, for the case of a statistically homogeneous medium with an accuracy up to a constant coefficient, satisfactorily agrees with the sounding data. The procedure for determining the coefficient in the Vorobyov formula for a specific lidar aperture size is recommended. The construction of a nomogram for the operational determination of the intensity of homogeneous turbulence from lidar readings is proposed. The discrepancy between the experimental results and the theory when sounding inhomogeneous turbulence is established. It is shown that the main contribution to the formation of the turbulent component of a lidar return due to the BSE effect is made by the section of the path in front of the scattering volume. It is proposed to use an approximate formula to restore the structure parameter of the optical turbulence C_n², in which normalized C_n² is directly proportional to the return and inversely proportional to the integral determining the dispersion of intensity fluctuations.

Keywords:

atmospheric turbulence, backscatter enhancement effect, turbulent lidar

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