Marine Boundary Layer Refractive Effects in the Infrared

Abstract

An experiment was conducted to determine whether ducting phenomena (gradients in refractivity) occur close to the ocean surface at infrared wavelengths. A CO2 laser beam (10.6 microns) was transmitted and received over an 8.5 km path in San Diego Bay. For the cases investigated (sea warmer than the air), the results of the study indicate that for air temperature gradients less than 1 C/meter, the distance to the infrared horizon was only 60% of the normal geometrical horizon.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1994
Accession Number
ADA285717

Entities

People

  • H. G. Hughes
  • H. V. Hitney
  • R. Feinberg

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Air Temperature
  • Amplifiers
  • Barometric Pressure
  • Carbon Dioxide Lasers
  • Computer Programs
  • Computers
  • Detectors
  • Laser Beams
  • Lasers
  • Line Of Sight
  • Measurement
  • Operating Systems
  • Optical Properties
  • Refraction
  • Refractive Index
  • Scattering
  • Temperature Gradients

Readers

  • Oceanography.
  • Spectroscopy.
  • Wave Propagation and Nonlinear Chaotic Dynamics.

Technology Areas

  • Directed Energy