Call number:
ZSP-202-343
In:
Research report
Description / Table of Contents:
CONTENTS: Abstract. - Preface. - Introduction. - Experimental procedure. - Experimental and theoretical equations. - Results and discussion. - Conclusions. - Literature cited.
Description / Table of Contents:
Simultaneous laser extinction measurements were made in warm fog at wavelengths of 0.6238, 1.15 and 10.6 [Mu]. The warm fog was generated in a 4-m^3 environmental chamber. Particle sampling was carried out simultaneously with the laser measurements using an impactor. Using the same size distribution in each case the theoretical extinction coefficients were calculated and compared with the experimental coefficients. Results obtained during this experiment and aprevious one indicate that propagation at 1.15 [Mu] is adversely affected by the presence of atmospheric water vapor. Experimental data obtained simultaneously at 0.6328 and 10.6 [Mu] indicate that virtually no difference exists between the extinction coefficients at these two wavelengths for moderate particle concentrations while at much larger concentrations [Alpha]0.6328 increases indefinitely while [Alpha]10.6 levels off at 0.2.
Type of Medium:
Series available for loan
Pages:
iii, 7 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 343
URL:
https://apps.dtic.mil/sti/tr/pdf/ADA017943.pdf
Language:
English
Branch Library:
AWI Library
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