Gating and Contrast-Modulation Related to Active Covert Night Photo Systems

Abstract

An investigation was made to compare the improvement of contrast modulation for different degrees of gated and non-gated Active Night Photo Systems. Illumination sources and sensor are near the same location. The effects of the atmospheric backscatter on the contrast modulation received by the imaging sensor was determined in steps from a fully gated to a non-gated situation. Characteristic curves were derived for several flight altitudes from 2,000 to 23,000 feet and atmospheric conditions of meteorological visibility of 23 Km and 5 Km representing an upper and a lower limit for the most frequently occurring conditions. Specific regions where the contrast modulation decreases at higher rates are shown.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1975
Accession Number
ADA011771

Entities

People

  • Bruno K. Wernicke

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Altitude
  • Atmospheres
  • Avionics
  • Backscattering
  • Classification
  • Ground Level
  • Illumination
  • Materials
  • Modulation
  • Optical Properties
  • Reconnaissance
  • Scattering
  • Security
  • Visibility

Readers

  • Atmospheric Remote Sensing.
  • Image Processing and Computer Vision.
  • Radar Systems Engineering.