Accession Number:

AD0728261

Title:

Monte Carlo Calculations in Spherical-Shell Atmospheres,

Descriptive Note:

Corporate Author:

RADIATION RESEARCH ASSOCIATES INC FORT WORTH TEX

Report Date:

1971-06-01

Pagination or Media Count:

84.0

Abstract:

The FLASH procedure was modified so that a printout of both the scattered intensity and the polarization parameters could be obtained as a function of the receiver polar and azimuthal angles. Calculations were run with FLASH for Rayleigh atmospheres with optical thicknesses of 0.25 and 1.0 for comparison with the data reported by Coulson, Dave and Sekera, and for a homogeneous Mie-Rayleigh atmosphere with a turbidity factor of 2 for comparison with the data reported by Bullrich, Eschelbach, et al. The FLASH procedure was modified so as to incorporate several methods of improving the accuracy of both single and higher order scattering calculations for twilight studies. The procedure was then used in a study to determine the effect of several assumed dust profiles on both the single and multiple scattered radiation under twilight illumination for 0.5 and 0.7 micrometer wavelength light. Results are presented which show how the color ratio ILambda0.7 micrometerILambda0.5 micrometer varies with the sun depression angle for a number of different dust profiles. Author

Subject Categories:

  • Atmospheric Physics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE