An Evaluation of the LOWTRAN 6 Navy Maritime Aerosol Model Using 8- to 12-Micrometers Sky Radiances.

Abstract

Measurements of infrared (8-12 micrometers) sky radiances over the ocean are compared with those calculated by LOWTRAN 6 by means of the Maritime Aerosol Model along with simultaneously measured (radiosonde) meteorological parameters and atmospheric radon concentrations. For a low wind-speed condition, the measured and calculated radiances agreed within 2% at the optical horizon. However, during moderate wind-speed conditions, the current wind speed component of the aerosol model had to be lowered by factors near 20 in order to produce agreement of the calculated and measured radiances. The adjusted model is then found to agree closely with published results of large particle size distribution measurements in the North Atlantic. Keywords: Optical scattering; Atmospheric modeling; Aerosol size distribution; Radiance algorithm; Infrared radiance; Thermal imaging.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA179817

Entities

People

  • Herbert G. Hughes

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Abstracts
  • Agreements
  • Air Masses
  • Altitude
  • Blackbody Radiation
  • Clouds
  • Data Sets
  • Humidity
  • Measurement
  • Military Research
  • Particle Size
  • Particles
  • Radiation
  • Scattering
  • Water Vapor

Fields of Study

  • Environmental science

Readers

  • Aerosol Science/Aerosol Physics
  • Astronomy and Astrophysics.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers