Acoustic Bottom Reflectivity at 1.5 KC.

Abstract

This memorandum describes the equipment and experimental technique being used in a study of acoustic bottom reflectivity and also presents a small amount of data obtained on the first sea trip. The authors conclude: (1) of the signal types used, the CW pulses gave best results. The FM chirps have some advantages and their use will be continued. The linear FM pulses show promise for long-range deep-water work but have no advantages at the ranges and depths used in this study; and (2) the three-layer model applied to the October data gives a considerably better fit than any of the two-layer models. It is expected that better control of the experiment, better information on the physical properties of the sediment, more data with uniform coverage at all angles, and some changes in the three-layer model assumptions will remedy the disagreement still shown by the three-layer model.

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Document Details

Document Type
Technical Report
Publication Date
May 08, 1963
Accession Number
ADA037367

Entities

People

  • R. R. Garner
  • W. E. Batzler

Organizations

  • Navy Electronics Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Signals
  • Amplitude
  • Coefficients
  • Deep Oceans
  • Deep Water
  • Frequency
  • Grazing
  • Grazing Angles
  • Low Angles
  • Ocean Basins
  • Physical Properties
  • Reflection
  • Reflectivity
  • Sea Water
  • Seabed
  • Silt
  • Water

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation
  • Neural Network Machine Learning.