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Multiple scattering depolarization in marine stratus clouds: lidar experiments
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sassen, K. Petrilla, R. L. |
| Copyright Year | 1986 |
| Description | The depolarization of ruby lidar backscattering caused by multiple scattering in marine stratus clouds was examined systematically from a field site on the southern California coast. Investigated were the effects on the linear depolarization (delta) of lidar receiver field of view (FOV), elevation angle and laser beam pointing errors. An approximately linear increase in maximum delta values was observed with increasing receiver FOV, and the importance of accurate transmitter/receiver beam alignment was demonstrated during experiments in which the laser axis was deliberately misaligned. An elevation angle dependence to the delta values was observed as a consequence of the natural vertical inhomogeneity of water cloud content above the cloud base. Time histories of the depolarization characteristics of dissipating stratus clouds revealed significant spatial and temporal variability in delta values attributed to cloud composition variations. Employing a 1 mrad transmitter FOV, maximum delta values of 0.21 nd 0.33 were observed with 1 and 3 mrad receiver FOVs, respectively, from the low stratus clouds. The fundamental causes and effects on the lidar equation of multiple scattering are also discussed. |
| File Size | 42242 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870000917 |
| Archival Resource Key | ark:/13960/t41s1pk4b |
| Language | English |
| Publisher Date | 1986-08-01 |
| Access Restriction | Open |
| Subject Keyword | Communications And Radar Temporal Distribution Stratus Clouds Spatial Distribution Backscattering Marine Meteorology Optical Depolarization Ruby Lasers Optical Radar Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
