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Accession Number:
ADA455730
Title:
Laser Transmission Model, Balloon Experiment, and Satellite Remote Sensing for Thin Cirrus to Support ABL
Descriptive Note:
Final rept. 1 Apr 2004-31 Dec 2005
Corporate Author:
CALIFORNIA UNIV LOS ANGELES
Report Date:
2006-03-31
Pagination or Media Count:
14.0
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 Earths 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.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE
