Laser Transmission Model, Balloon Experiment, and Satellite Remote Sensing for Thin Cirrus to Support ABL
Abstract
A three-dimensional (3-D) model has been developed for the transmission and backscattering of a high-energy laser beam through inhomogeneous high-level clouds in plane-parallel and spherical geometries. The formulations of laser transmission and backscattering are based on the successive-order-of scattering approach in which multiple scattering by cloud and aerosol particles can be effectively accounted for. Effects of the cloud inhomogeneity on 3-D laser transmission and backscattering have been examined by using 3-D cirrus cloud fields inferred from a combination of satellite data and a parameterization of the vertical cloud profile involving temperature from sounding and /or analysis. The model simulation results for 3D direct transmission, forward-scattered transmission, and backscattering differ substantially from those for the 2-D model developed previously. The Earth's curvature effect becomes increasingly significant for laser transmission as the distance between the aircraft and the target increases. The 3-D laser transmission and backscattering model can be directly linked to cloud data derived from satellite remote sensing and numerical forecasting models for tactical application.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 2006
- Accession Number
- ADA455730
Entities
People
- K. N. Liou
- S. C. Ou
- Y. Takano
Organizations
- University of California, Los Angeles