Fog and Haze in Europe and their Effects on Performance of Electro-Optical Systems,

Abstract

It is generally agreed that propagation of electromagnetic energy is affected by fog drops and water vapor, but climatological probabilities of attenuation do not exist except for the visible range which has wavelengths from about 0.4 to 0.7 micrometer. Unfortunately, attenuation in the visible portion of the spectrum does not uniquely determine attenuation of other wavelengths. The ratio of middle infrared attenuation to visible attenuation is determined mainly by the sizes of the drops in a fog because water vapor attenuation is small in the middle infrared and negligible in the visible. Water vapor is an important factor to be considered near one millimeter.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1978
Accession Number
ADA056431

Entities

People

  • Dorothy A. Stewart
  • Oskar M. Essenwanger

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Attenuation
  • Central Europe
  • Cloud Cover
  • Clouds
  • Computer Programs
  • Computers
  • Dew Point
  • Electromagnetic Radiation
  • Europe
  • Frequency
  • Measurement
  • Radiation
  • Refractive Index
  • Transition Temperature
  • Vapors
  • Water Vapor
  • Wave Propagation

Readers

  • Aerosol Science/Aerosol Physics
  • Atmospheric Science/Meteorology
  • Microwave Engineering.