DIRECTIONAL REFLECTANCE OF ATMOSPHERIC PATHS OF SIGHT,

Abstract

The contrast reducing properties of any path of sight inclined downward through the atmosphere can be specified by a single dimensionless number analogous to a reflectance and called the directional reflectance of the path of sight R*. The contrast transmittance of the path depends solely upon the ratio of the directional path reflectance to the inherent directional reflectance of the background. Previously published optical atmospheric data derived from in-flight measurements have been used to produce tables of R* for two clear-weather conditions. A simple nomograph and numerical examples are included.

Document Details

Document Type
Technical Report
Publication Date
May 01, 1969
Accession Number
AD0688265

Entities

People

  • Seibert Q. Duntley

Tags

DTIC Thesaurus Topics

  • Atmospheres
  • Contrast
  • Directional
  • Measurement
  • Nomographs
  • Optical Properties
  • Physical Properties
  • Reflectance
  • Transmittance

Readers

  • Calculus or Mathematical Analysis
  • Fluid Dynamics.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.