Digital Imaging of Clear-Sky Polarization

Abstract

If digital images of clear daytime or twilight skies are acquired through a linear polarizing filter, they can be combined to produce high-resolution maps of skylight polarization. Here polarization (P) and normalized Stokes parameter (Q) are measured near sunset at one inland and two coastal sites. Maps that include the principal plane consistently show that the familiar Arago and Babinet neutral points are part of broader areas in which skylight polarization is often indistinguishably different from zero. A simple multiple-scattering model helps explain some of these polarization patterns.

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Document Details

Document Type
Technical Report
Publication Date
Mar 20, 1998
Accession Number
ADA530701

Entities

People

  • Raymond L. Lee Jr.

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Cameras
  • Depolarization
  • Digital Images
  • Image Processing
  • Images
  • Light Sources
  • Linear Polarization
  • Measurement
  • Observation
  • Optics
  • Orientation (Direction)
  • Photographs
  • Polarization
  • Polarizers
  • Polarizing Filters
  • Scattering
  • United States Naval Academy

Fields of Study

  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Spectroscopy.
  • Systems Analysis and Design