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Proceedings Paper

Correct weighting of atmospheric transmittance and target temperature applied to IR airborne reconnaissance systems
Author(s): Yair Z. Lauber; David Braun
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Paper Abstract

The development of IR airborne reconnaissance systems at ELOP involves numerous analyses and optimizations. It has been found that contradictions arise, the results based on SNR calculations for a particular system were better in a specific spectral band, while in the overall performance prediction (MRT and GRD) a different spectral band appeared to be preferable. In many calculations, it is common practice to convert a detailed and accurate function into a single averaged parameter to simplify calculations. The accuracy and reliability of the prediction, no matter which model is in use, depends on correct averaging. In IR imaging system analysis, weighting according to Planck's equation is appropriate, but sometimes is omitted for the sake of simplicity. This paper shows how ignoring this weighting causes misleading results, both in performance prediction and design decision making such as choosing spectral band. Examples of the differences between the approaches will be shown.

Paper Details

Date Published: 24 July 2000
PDF: 8 pages
Proc. SPIE 4029, Targets and Backgrounds VI: Characterization, Visualization, and the Detection Process, (24 July 2000); doi: 10.1117/12.392536
Show Author Affiliations
Yair Z. Lauber, ElOp Electrooptics Industries Ltd. (Israel)
David Braun, ElOp Electrooptics Industries Ltd. (Israel)


Published in SPIE Proceedings Vol. 4029:
Targets and Backgrounds VI: Characterization, Visualization, and the Detection Process
Wendell R. Watkins; Dieter Clement; William R. Reynolds, Editor(s)

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