Twodimensional modeling of multiply scattered laser radiation in optically dense aerosols
Abstract
The discrete ordinates finite element radiation transport code TWOTRAN is applied to describe the multiple scattering of a laser beam from a reflecting target. For a model scenario involving a 99% relative humidity rural aerosol, we compute the average intensity of the scattered radiation and correction factors to the LambertBeer law arising from multiple scattering. As our results indicate, two dimensional xy and rz geometry modeling can reliably describe a realistic three dimensional scenario. Specific results are presented for the two visual ranges of 1.52 and 0.76 km which show that for sufficiently high aerosol concentrations (e.g., equivalent to V = 0.76 km) the target signature in a distant detector becomes dominated by multiply scattered radiation from interactions of the laser light with the aerosol environment.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 1982
 Bibcode:
 1982STIN...8322590Z
 Keywords:

 Aerosols;
 Computer Programs;
 Finite Element Method;
 Light Scattering;
 Mathematical Models;
 Two Dimensional Models;
 Analysis (Mathematics);
 Colloids;
 Computerized Simulation;
 Dispersions;
 Electromagnetic Scattering;
 Lasers and Masers