Accession Number : AD0681122

Title :   COMPARISON OF ATMOSPHERIC PATH RADIANCE CALCULATIONS FOR MODEL CLEAR AND HAZY ATMOSPHERES,

Corporate Author : RADIATION RESEARCH ASSOCIATES INC FORT WORTH TEX

Personal Author(s) : Collins,Dave G. ; Wells,Michael B.

Report Date : 15 JUN 1968

Pagination or Media Count : 36

Abstract : The LITE-IV Monte Carlo Program was used to calculate ground reflectances and path radiances as a function of altitude and direction for a model atmosphere with a haze layer between the ground and an altitude of 3 km. Broad beam monodirectional monochromatic light sources ranging in wavelength from 0.35 to 0.95 microns were assumed incident to the model atmosphere at zenith angles ranging from 0 to 87.5 degrees. The atmosphere was assumed to be bounded on the lower surface by a Lambert type reflection surface having an albedo ranging from 0.0 to 0.9. The haze layer was defined by adding aerosols below three km altitudes to a model clear atmosphere so that the ground level meteorological range was reduced from 25 to 3 km. Several comparisons of the calculated ground reflectances and path radiances for the model hazy atmosphere are made with previously reported data for a model clear atmosphere illustrating some of the effects of adding a haze layer to the atmosphere. The effects of ground albedo, angles of observations, and angle of incidence on the calculated path radiances are shown for the hazy atmosphere. (Author)

Descriptors :   (*ATMOSPHERE MODELS, *LIGHT TRANSMISSION), VISIBILITY, POLARIZATION, HAZE, AEROSOLS, SCATTERING, MONTE CARLO METHOD, REFLECTION, ALBEDO, PARTICLE SIZE, DISTRIBUTION, INTENSITY, MONOCHROMATIC LIGHT

Subject Categories : Atmospheric Physics
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE