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Atmospheric particulate analysis using angular light scatteringUsing light scattering matrix elements measured by a polar nephelometer, a procedure for estimating the characteristics of atmospheric particulates was developed. A theoretical library data set of scattering matrices derived from Mie theory was tabulated for a range of values of the size parameter and refractive index typical of atmospheric particles. Integration over the size parameter yielded the scattering matrix elements for a variety of hypothesized particulate size distributions. A least squares curve fitting technique was used to find a best fit for the experimental measurements. This was used as a first guess for a nonlinear iterative inversion of the size distribution. A real index of 1.50 and an imaginary index of -0.005 are representative of the smoothed inversion results for the near ground level atmospheric aerosol in Tucson.
Document ID
19800069085
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hansen, M. Z.
(NASA Goddard Space Flight Center Laboratory for Atmospheric Sciences, Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
October 15, 1980
Publication Information
Publication: Applied Optics
Volume: 19
Subject Category
Environment Pollution
Accession Number
80A53255
Funding Number(s)
OTHER: N00014-75-C-0208
PROJECT: NSF PROJECT 35021004
Distribution Limits
Public
Copyright
Other

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