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Proceedings Paper

Development of high resolution statistically nonstationary infrared earthlimb radiance scenes
Author(s): Lisa A. Strugala; Jerry E. Newt; Walter I. Futterman; Eric L. Schweitzer; Bruce J. Herman; Robert D. Sears
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Paper Abstract

This paper describes the development of a 3-D statistically non-stationary earthlimb stochastic structure representation and its application to the implementation of earthlimb infrared (IR) structured scenes. The stochastic structure overlay is constructed from a 2-D diagonal cut through a 3-D matrix of correlated Gaussian deviates: each plane of the matrix represents a statistically constant representation of the two-dimensional correlation lengths at a given altitude above the earth. Each matrix plane is generated by using successive 2-D FFT routines that have empirical values of vertical and horizontal correlation lengths as input. The total deviate variance versus altitude is then scaled from empirical measurements of fluctuations in atmospheric density, temperature, and/or emissivity. Scene correlation lengths are validated by performing diagnostics on the overlays. These structures generators have been used both as perturbations on input atmospheric data to earthlimb IR radiance codes and as high resolution overlays to earthlimb IR mean radiance 2-D scenes. Examples of modeling results are presented and discussed.

Paper Details

Date Published: 1 July 1991
PDF: 12 pages
Proc. SPIE 1486, Characterization, Propagation, and Simulation of Sources and Backgrounds, (1 July 1991); doi: 10.1117/12.45760
Show Author Affiliations
Lisa A. Strugala, Lockheed Palo Alto Research Lab. (United States)
Jerry E. Newt, Lockheed Palo Alto Research Lab. (United States)
Walter I. Futterman, Lockheed Palo Alto Research Lab. (United States)
Eric L. Schweitzer, Lockheed Palo Alto Research Lab. (United States)
Bruce J. Herman, Lockheed Palo Alto Research Lab. (United States)
Robert D. Sears, Lockheed Palo Alto Research Lab. (United States)


Published in SPIE Proceedings Vol. 1486:
Characterization, Propagation, and Simulation of Sources and Backgrounds
Wendell R. Watkins; Dieter Clement, Editor(s)

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