Emissive Versus Attenuating Smokes

Abstract

Emissive smoke clouds reduce visibility by attenuating the image that is being viewed along with superimposing scattered and emitted radiation onto that image. Thus, contrast and signal to noise ratio are reduced by a combination of attenuation (governed by the extinction coefficient), scatter (governed by the single scatter albedo), and emission (governed by single scatter albedo and cloud temperature). Two alternate approaches are investigated. First, the entire cloud including air is heated. Secondly, flare particles are placed within a scattering smoke. The first approach is found to be impractical because of energy requirements and cloud buoyancy while the second approach appears to significantly reduce contrast and signal to noise.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2002
Accession Number
ADA400816

Entities

People

  • Jason Embury

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Buoyancy
  • Chemical Reactions
  • Coefficients
  • Contrast
  • Emission
  • Exothermic Reactions
  • Extinction
  • Fluid Mechanics
  • Heat Transfer
  • High Temperature
  • Losses
  • Optical Properties
  • Particle Size
  • Particles
  • Radiative Transfer
  • Reynolds Number
  • Scattering

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Radar Systems Engineering.
  • Rocket Propulsion.