Measurement of Low-Altitude Infrared Transmission.

Abstract

Infrared propagation at low altitudes is determined by extinction caused by molecules, aerosol particles, and ray bending by refraction, three effects that control the mean value of the signal (the transmission). Interference induces fluctuations of the signal (scintillation) about that mean value. This report discusses the design, calibration, and limitations of a field instrument for measuring transmission and scintillation inside the midwave and longwave infrared atmospheric passbands. The instrument, which is accurate to +/- 10% has been used to investigate aerosol, refractive, and scintillation phenomena in the marine boundary layer.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1999
Accession Number
ADA365507

Entities

People

  • B. D. Nener
  • C. R. Zeisse
  • R. V. Dewees

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Boundary Layer
  • Calibration
  • Detectors
  • Electronics
  • Elevation
  • Forward Scattering
  • Low Altitude
  • Measurement
  • New York
  • Optical Phenomena
  • Optical Properties
  • Optics
  • Particles
  • Refractive Index
  • Temperature Gradients

Fields of Study

  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Wave Propagation and Nonlinear Chaotic Dynamics.