The generation of ruby lidar depolarization from multiple scattering in marine stratus clouds has been examined systematically from a field site on the southern California coast. Investigated were the effects on the linear depolarization ratio δ of lidar receiver field of view (FOV), elevation angle, and laser alignment error. An approximately linear increase in maximum δ values was observed with increasing receiver FOV, and the importance of accurate transmitter/receiver alignment has been demonstrated. An elevation angle dependence to the δ values was observed as a consequence of the vertical inhomogeneity of water cloud content above cloud base. Time histories of the depolarization characteristics of dissipating stratus clouds revealed significant variability in δ values due to cloud composition variations. Employing a 1-mrad transmiter FOV, maximum δ values of 0.21 and 0.33 were observed with 1- and 3-mrad receiver FOVs, respectively.
© 1986 Optical Society of America
Original Manuscript: January 3, 1986
Published: May 1, 1986
Kenneth Sassen and Richard L. Petrilla, "Lidar depolarization from multiple scattering in marine stratus clouds," Appl. Opt. 25, 1450-1459 (1986)