Computer Procedure for Calculating Time Dependent Light Scattering in Spherical-Shell Atmospheres
Abstract
The report describes three Monte Carlo procedures that were developed for the purpose of providing calculational tools that could be used to study the transport of visible and infrared light in spherical-shell atmosphere. These procedures, designated as FLASH, treat atmospheric scattering problems for plane-parallel, point, volume and spherical surface sources. The FLASH procedures consider the effect of Rayleigh and aerosol scattering and ozone, water vapor, CO2, and aerosol particle absorption on the transport of light. The procedures also consider the changes in polarization that occurs at each scattering event. The input formats of the codes allows one to describe the scattering and absorption properties of the atmosphere as a function of altitude. Provisions are incorporated for treating the reflection of light from ground and cloud surfaces with an albedo method. Also described are the MIE-II and SHINE procedures. The MIE-II procedure uses Mie theory to generate aerosol particle scattering and absorption coefficients and the four elements of the aerosol phase matrix for use as input data to the FLASH procedures. The SHINE procedure was developed to integrate the results of FLASH CALCULATIONS FOR POINT MONOCHROMATIC SOURCES OVER AN ARBITRARY WAVELENGTH AND TIME DEPENDENT SOURCE SPECTRUM.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1971
- Accession Number
- AD0722713
Entities
People
- Dave G. Collins
- Michael B. Wells