Emissivity as a Function of Surface Roughness: A Computer Model.

Abstract

Surface geometry plays an important role in modelling backgrounds in the infrared. In particular, surface roughness of the ocean varies as a function of wind speed, and therefore it is important to realize the impact of surface roughness on self-emissions over a wide range of wavelengths and wind speeds. This paper describes the results of a computer model used to generate a synthetic surface as a function of wind speed on the average emissivity of the given surface. Surfaces generated with varying spectral content are compared. Capillary waves are shown to have a measurable effect on the average emissivity of the ocean surface, and therefore should not be ignored when constructing a model of the ocean surface. Keywords: Emissivity; Infrared; Surface roughness; Sea surface modelling.

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Document Details

Document Type
Technical Report
Publication Date
Aug 29, 1986
Accession Number
ADA172230

Entities

People

  • David Hon
  • Ira B. Schwartz

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Capillary Waves
  • Classification
  • Computers
  • Emission
  • Emissivity
  • Geometry
  • Microvessels
  • Optical Properties
  • Optics
  • Power Spectra
  • Reflectance
  • Roughness
  • Sea Surface Temperature
  • Security
  • Surface Roughness
  • Surface Temperature
  • Wind Velocity

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Image Processing and Computer Vision.