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Proceedings Paper

Comparison Of Methods Used To Determine The Mass Extinction Coefficient For Phosphorus Smokes
Author(s): W. M. Farmer; K. L. Krist
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Paper Abstract

Fourier transform analysis of data obtained during Smoke Week III indicates that the mass extinction coefficient for phosphorus smokes appears to be similar to a stochastic variable with a nonstationary mean. In the present work, this analysis is extended to examine the temporal dependence of the mass extinction coefficient for 1) selected wavelengths in the 6 - 12 micrometre band over a 5m path, and 2) for 3.4 micrometres over a path approaching 100m. The nonstationary mean values obtained with the Fourier transform analysis are then compared to those obtained using particle size distribution data. The comparison shows reasonably good consistency between the two sets of data and suggests that, in at least some cases, the mass extinction coefficient should not be treated as an "optical constant" of the smoke.

Paper Details

Date Published: 30 December 1981
PDF: 10 pages
Proc. SPIE 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance, (30 December 1981); doi: 10.1117/12.932691
Show Author Affiliations
W. M. Farmer, The University of Tennessee Space Institute (United States)
K. L. Krist, The University of Tennessee Space Institute (United States)


Published in SPIE Proceedings Vol. 0305:
Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance
Richard Gomez, Editor(s)

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