Laser Pulse Speckle Effects.

Abstract

The fluctuations of a scattered laser pulse resulting from the illumination of uncorrelated, rough-surface areas of a target are examined. Amplitude fluctuations are treated as a random process with stationary increments. LADAR range-Doppler images can n be degraded by these fluctuations. Field structure functions are calculated for conical targets and a normalized structure function is found to be temporally invariant. Range and Doppler smearing of LADAR target signatures is facilitated by the use of the local degree of coherence function which is simply related to the normalized structure function for targets having normalized local homogeneity (such as cones). (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 10, 1977
Accession Number
ADA048598

Entities

People

  • J. C. Leader

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Amplitude
  • Corporations
  • Detection
  • Electromagnetic Scattering
  • Frequency
  • Geometry
  • Homogeneity
  • Laser Pulses
  • Laser Radar
  • Radiation
  • Scattering
  • Spectra
  • Spectrum Signatures
  • Statistics
  • Surface Roughness
  • Target Signatures

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Radar Systems Engineering.
  • Statistical inference.

Technology Areas

  • Directed Energy