Fast "stretched-space" method for generating synthetic vertical sheets of nonstationary stochastic atmospheric structure for infrared  background scene simulation

James H. Brown; Neil J. Grossbard

doi:10.1117/1.601038

1 April 1996 Fast "stretched-space" method for generating synthetic vertical sheets of nonstationary stochastic atmospheric structure for infrared background scene simulation

James H. Brown, Neil J. Grossbard

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Optical Engineering, Vol. 35, Issue 4, (April 1996). https://doi.org/10.1117/1.601038

Images of atmospheric airglow emissions 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 random arrays by passing stochastic data through filters that provide a desired correlation structure and power spectral dependency. A 2-D array, or vertical sheet, of nonstationary synthetic structure is produced by means of a nonlinear ‘‘stretched space’’ transformation. Since computations that apply multidimensional transforms to large data arrays consume enormous computer resources and run times, an alternative autoregressive method is employed to reduce the heavy computational burden. Future editions of the Phillips Laboratory Strategic High Altitude Atmospheric Radiance Code (SHARC) will feature an ability to compute structured radiance. The method explored provides a process for rapidly generating large arrays of 2-D nonstationary structure.

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James H. Brown and Neil J. Grossbard "Fast "stretched-space" method for generating synthetic vertical sheets of nonstationary stochastic atmospheric structure for infrared background scene simulation," Optical Engineering 35(4), (1 April 1996). https://doi.org/10.1117/1.601038

Published: 1 April 1996

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