Experimental estimation of the backscatter enhancement peak
I.A. Razenkov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: atmospheric turbulence, backscatter enhancement effect, lidar
Abstract
The results of an experiment in which the intensity distribution of scattered radiation at the transmitting-receiving aperture of a turbulent lidar was studied are presented. Sounding was performed along a horizontal path in moderate turbulence with a narrow laser beam located in the center of the receiving aperture, the size of which could be changed. As the size of the receiving aperture increased, the relative contribution to the echo signal due to turbulence decreased. It was found that the BSE effect localized in the center of the receiving aperture: the peak of the scattered radiation is located at the axis of the sounding beam, and its size is approximately equal to the beam size; at the periphery, the average intensity of scattered radiation slowly decreased to background values as the distance from the beam axis increased. The result can be used in practice for optimal selection of parameters of the transceiver when designing a turbulent lidar.
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