Correct weighting of atmospheric transmittance and target temperature applied to IR airborne reconnaissance systems

Yair Z. Lauber; David Braun

doi:10.1117/12.392536

24 July 2000 Correct weighting of atmospheric transmittance and target temperature applied to IR airborne reconnaissance systems

Yair Z. Lauber, David Braun

Author Affiliations +

Proceedings Volume 4029, Targets and Backgrounds VI: Characterization, Visualization, and the Detection Process; (2000) https://doi.org/10.1117/12.392536
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

Citation Download Citation

Yair Z. Lauber and David Braun "Correct weighting of atmospheric transmittance and target temperature applied to IR airborne reconnaissance systems", Proc. SPIE 4029, Targets and Backgrounds VI: Characterization, Visualization, and the Detection Process, (24 July 2000); https://doi.org/10.1117/12.392536

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