Application of Two-Dimensional Discrete-Ordinates Methods to Multiple Scattering of Laser Radiation.
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, the authors compute the average intensity of the scattered radiation and correction factors to the Lambert-Beer law arising from multiple scattering. As their results indicate, two-dimensional x-y and r-z 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. The merits of the scaling group and the delta M approximation for the transfer equation are also explored.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1983
- Accession Number
- ADA133258
Entities
People
- A. Zardecki
- J. F. Embury
- S. A. W. Gerstl
Organizations
- United States Army Armament Research, Development and Engineering Center