Intensity Calculations Using a Geometrical Model of Snell's Law.

Abstract

In USL Memorandum serial 1110-83 of 1 December 1953, a geometrical model of Snell's Law was presented. It was further shown how the formula for the horizontal range increment, R sub n, in a layer of water of a constant velocity gradient can be expressed in terms of velocities as prescribed by this model. The justification for this form of expression was argued to consist in the simplification of the programming of ray calculations. In a further memorandum (USL Confidental Technical Memorandum No. 1110-01-58) the geometrical model was also applied to the formula for incremental travel time, with the expectation of unifying the methods of calculation of both R sub n and t sub n solely in terms of the velocity structure. It is the purpose of this report to extend these methods of computation and include the formula for the intensity ratio (I sub o/I, where I sub o is the index intensity) at any point along the ray path in the above set.

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Document Details

Document Type
Technical Report
Publication Date
May 21, 1958
Accession Number
ADA072189

Entities

People

  • Olgerts Puravs

Organizations

  • Navy Underwater Sound Laboratory

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Computer Programming
  • Deep Water
  • Equations
  • Intensity
  • Military Research
  • Reflection
  • Shallow Water
  • Travel Time
  • Underwater Sound
  • Water

Readers

  • Fluid Dynamics.
  • Theoretical Analysis.
  • Wave Propagation and Nonlinear Chaotic Dynamics.