Accession Number : ADA304814

Title :   A Fast 'Stretched Space' Method for Generating Synthetic Vertical Sheets of Non-Stationary Stochastic Atmospheric Structure.

Descriptive Note : Environmental research paper, 1 Jun 94-31 Jan 95,

Corporate Author : PHILLIPS LAB HANSCOM AFB MA

Personal Author(s) : Brown, James H.

PDF Url : ADA304814

Report Date : 17 MAR 1995

Pagination or Media Count : 19

Abstract : Geophysical phenomena are often characterized by known or assumed power spectral density functions that have an asymptotic negative power law slope dependency. Various filter synthesis methods are routinely employed to generate synthetic scenes from pseudorandom arrays by passing stochastic data through filters having a desired correlation structure and power spectral dependency. This report examines the possibility of producing a two dimensional Vertical sheet of nonstationary synthetic structure by means of a 'stretched space' transformation. Since computations that apply multidimensional transforms to large data arrays consume enormous computer resources and run times, the goal of his study is to find an alternate method to reduce the heavy computational burden. Future editions of the Phillips Laboratory Strategic High Altitude Atmospheric Radiance Code (SHARC) will feature an ability to calculate structured radiance.

Descriptors :   *MATHEMATICAL ANALYSIS, *ATMOSPHERIC PHYSICS, COMPUTATIONS, STOCHASTIC PROCESSES, SYNTHESIS, POWER SPECTRA, CORRELATION, MATHEMATICAL FILTERS, RADIANCE, GEOPHYSICS, PSEUDO RANDOM SYSTEMS.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE