25 May 2005 Passive ranging of emissive targets using atmospheric oxygen absorption lines
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Abstract
Highly-energetic targets such as rocket plumes and detonation fireballs are difficult to locate and track effectively with active sensors that rely on reflection, but traditional passive sensors cannot determine range. Development of a passive ranging sensor will enable accurate target location and tracking while simultaneously improving covertness. Recent work is presented on development of a passive sensor to estimate range using spectroscopic measurements of atmospheric absorption. In particular, advantages of measuring absorption on the O 2(bX) transition near 762nm are discussed. Theoretical predictions are compared with experimental results to verify model performance at short ranges (up to 200m). Range accuracy better than 1% has been demonstrated using a Fourier transform spectrometer at short range. Extension of the theory to long range (in excess of 100km) is also discussed.
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Michael R. Hawks, Michael R. Hawks, Glen P. Perram, Glen P. Perram, } "Passive ranging of emissive targets using atmospheric oxygen absorption lines", Proc. SPIE 5811, Targets and Backgrounds XI: Characterization and Representation, (25 May 2005); doi: 10.1117/12.604538; https://doi.org/10.1117/12.604538
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