Lidar Multiple Scattering/Depolarization in Stratus Clouds.
Abstract
The contributions of multiple scattering to backscattered depolarization ratios in stratus clouds were investigated using a linearly-polarized ruby lidar system from a site on the southern Californis coast. The effects of the receiver field of view, lidar elevation angle, the transmitter/receiver beam misalignment on depolarization ratios were investigated. Results for a 1 mrad transmitter beam width indicate that a receiver field of view of 3 mrad returns an almost threefold increase in backscattered depolarization ratios as opposed to a 1 mrad field of view. The effects caused by changing the elevation angle appear to be related to the cloud base. Deliberate beam alignment produces significant alterations in the lidar returns, demonstrating the importance of maintaining proper alignment. In the future, the lidar should be used in conjunction with in situ microphysical observations and a program of theoretical studies to assess the degree to which the lidar data can be related to specific stratus cloud properties. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1985
- Accession Number
- ADA160899
Entities
People
- R. L. Petrilla
Organizations
- Air Force Institute of Technology