Scene change artifacts in fourier transform spectroscopy of temporally changing sources

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Improved understanding of midwave infrared (1-5 micron) spectral emissions from detonation fireballs is needed to develop phenomenological models for battle space optical forensics. The ability to measure radiance over a wide band pass at arbitrary resolutions make Fourier-transform spectrometers (FTS) an attractive tool. However, interferometer based spectroscopic measurements can be corrupted when the observed intensity changes during data acquisition. While small, random fluctuations in scene intensity translate into noise, systematic variations introduce scene-change artifacts (SCAs)into Fourier-transformed spectrum. Approximating a detonation fireball as a blackbody radiator, modified with an atmospheric attenuation Tatm, with an exponentially cooling temperature T(t)=T0e -kt, double sided interferograms from an ideal Michelson interferometer were simulated and converted to a measured spectrum Lm to characterize the nature and magnitude of SCA

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Oorspronkelijke releasedatum: 09 oktober 2012

Aantal pagina's: 60

Hoofdauteur: Anthony M Young

Tweede Auteur: Anthony M. Young

Hoofduitgeverij: Biblioscholar

Product breedte: 189 mm

Product hoogte: 3 mm

Product lengte: 246 mm

Verpakking breedte: 189 mm

Verpakking hoogte: 3 mm

Verpakking lengte: 246 mm

Verpakkingsgewicht: 127 g

EAN: 9781249594314

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