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