Abstract

The line shape of backscattered laser power is Doppler broadened by backscattering of air molecules. This paper presents a theoretical analysis of the influence of Doppler broadening of the Rayleigh backscattered laser line on the measurement of the water vapor density $\text{N}\left(\overline{\text{R}}\right)$ in the atmospheric layer at $\overline{\text{R}}=\left({\text{R}}_1+{\text{R}}_2\right)/2$ with thickness dR = R₂– R₁using the Dial approximation where ${\sigma }_1\left(\overline{\text{R}}\right)$ is the calculated on line absorption cross section and P_ijwith i=1: on line, i=2: off line and j=1, 2 are the detected lidar signals for R₁anti R₂. In order to determine these effects quantitatively, results of simulation studies are presented.

© 1985 Optical Society of America