Color and Luminance Asymmetries in the Clear Sky

Abstract

A long-standing assumption about the clear sky is that its colors and luminances are distributed symmetrically about the principal plane. As useful as this approximation is, our digital-image analyses show that clear-sky color and luminance routinely depart perceptibly from exact symmetry. These analyses reconfirm our earlier measurements with narrow field-of-view spectroradiometers, and they do so with much higher temporal and angular resolution across the entire sky dome.

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Document Details

Document Type
Technical Report
Publication Date
Jan 20, 2003
Accession Number
ADA525411

Entities

People

  • Javier Hernandez-andres
  • Javier Romero
  • Raymond L. Lee Jr.

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Asymmetry
  • Cameras
  • Color Temperature
  • Daylight
  • Digital Images
  • Light Sources
  • Luminance
  • Measurement
  • Measuring Instruments
  • Optical Phenomena
  • Optical Properties
  • Optics
  • Photographs
  • Scattering
  • Symmetry
  • United States Naval Academy

Fields of Study

  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Educational Psychology
  • Structural Dynamics.