Turbulence Simulation: On Phase and Deflector Screen Generation

Abstract

This report examines the topic of phase screen generation and introduces an alternative method of modeling propagation through turbulence based on an extended raytrace method involving passage through three-dimensionally varying refractive turbulence. The mathematics of propagation through turbulence are thoroughly detailed, including several derivations often left as exercises for the reader in other documentation. Chapter 2 contains an analysis of the interrelationships between Fourier transforms, Fourier series, and Fast Fourier Transform (FFT) methods. These methods are used in chapter 3 to describe means of transforming between common mathematical forms of turbulence spectra used in the literature and standard engineering forms for employing FFTs. Chapter 4 concludes with an analysis of phase screen and deflector screen generation and usage.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2001
Accession Number
ADA397150

Entities

People

  • David H. Tofsted

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computational Science
  • Diffraction
  • Engineering
  • Fast Fourier Transforms
  • Fourier Analysis
  • Fourier Series
  • Information Science
  • Integral Transforms
  • Integrals
  • Mathematical Analysis
  • Mathematics
  • Periodic Functions
  • Power Spectra
  • Simulations
  • Three Dimensional
  • Two Dimensional
  • Wave Propagation

Readers

  • Approximation Theory.
  • Business Analytics
  • Wave Propagation and Nonlinear Chaotic Dynamics.