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Proceedings Paper

Passive ranging using mid-wavelength infrared atmospheric attenuation
Author(s): Douglas James Macdonald; Michael R. Hawks; Kevin C. Gross
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Paper Abstract

Methods of estimating range to an emissive target based on the depth of an atmospheric absorption band are presented. The present work uses measurements of the CO2 absorption band centered at 2.0 μm where signal-to-background ratios are maximum for many applications. Observed spectra are compared to model spectra to estimate range. Spectral regions with minimal attenuation are used to estimate source parameters in order to isolate atmospheric transmission. The spectra of 21 high explosive events were used to test this technique. A simple technique treating the fireball as a blackbody consistently underestimated true range by approximately 13%. A more realistic source model using some order-of-magnitude assumptions of fireball composition reduces range error to 3%. The technique produces accurate results without requiring detailed knowledge of source parameters or atmospheric conditions.

Paper Details

Date Published: 3 May 2010
PDF: 9 pages
Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 766041 (3 May 2010); doi: 10.1117/12.850154
Show Author Affiliations
Douglas James Macdonald, Air Force Institute of Technology (United States)
Michael R. Hawks, Air Force Institute of Technology (United States)
Kevin C. Gross, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 7660:
Infrared Technology and Applications XXXVI
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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