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Proceedings Paper

Realistic model for battlefield fire plume simulation
Author(s): Dorothy Bruce
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Paper Abstract

Real battlefields are very messy places which may contain burning vehicles, vegetation, or buildings and with atmospheres containing dust and smoke clouds. Realistic scene simulation for system evaluation must therefore also contain these same elements. A model has been developed to generate realistic images of fire plumes from burning military vehicles. Model output includes transmittance through the plume and radiance from the fire and hot effluents for a selected image matrix. The simulated image varies with time based on simulated wind fluctuations. The plume centerline fluctuates about a curve in the wind-aligned plane. The effluent gas and aerosol concentrations and the plume temperature vary throughout the plume. The variation is a fractional change from a Gaussian distribution and is based on measurements of temperature and short-path transmission in fire plumes. The model can be used to generate both visible and infrared fire plume images. The images can be combined with background images by multiplying elements of the background image by the transmittance matrix elements and then adding the elements of the radiance matrix. The order in which these operations are performed is as critical as the order of steps taken in data analysis. The image matrix elements can be tailored to correspond to pixels from an imager by choosing appropriate values for the waveband, the distance from the imager to the fire, and the angular resolution per pixel. Spatial averaging is used to obtain realistic results when the fire is small compared with pixel size.

Paper Details

Date Published: 1 July 1991
PDF: 6 pages
Proc. SPIE 1486, Characterization, Propagation, and Simulation of Sources and Backgrounds, (1 July 1991); doi: 10.1117/12.45765
Show Author Affiliations
Dorothy Bruce, U.S. Army Atmospheric Sciences Lab. (United States)

Published in SPIE Proceedings Vol. 1486:
Characterization, Propagation, and Simulation of Sources and Backgrounds
Wendell R. Watkins; Dieter Clement, Editor(s)

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