This study presents the IR radiative transport properties of brush fire smoke
clouds computed for a model with finite horizontal dimensions as well as the
more common plane-parallel model. The finite model is a 3-D version of the
two-stream approximation applied to cubic clouds of steam, carbon, and
silicates. Assumptions are made with regard to the shape and size distributions
of the smoke particles. It is shown that 11.5-μm
radiometry can detect fires beneath smoke clouds if the path integrated mass
density of the smoke is ≲3 g/m2.
© 1981 Optical Society of America
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