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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 4 — Feb. 1, 2006
  • pp: 799–808

Noise, clutter, and determinism in infrared spectral signatures under varying meteorological conditions

Dennis F. Flanigan, Alan C. Samuels, Changjiang Zhu, and Francis D'Amico  »View Author Affiliations

Applied Optics, Vol. 45, Issue 4, pp. 799-808 (2006)

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Infrared remote detection of chemical and biological agents in a complex environment depends on the ability to recognize threat signatures and differentiate them from the signatures of innocuous materials. In this paper, we addressed the methods of producing the constraint spectra needed to ensure reliable operation in a meteorologically changing environment. We collected arrays of background spectra of ground, woods, and low-angle sky on an irregular basis over a period of a year. Based on the hypothesis that the concentration fluctuations of species in the sensor's field of view can be exploited to form signatures, the standard deviations of the array (the result is characteristic of all fluctuations) and the difference array (the result is characteristic of sensor fluctuations) were computed. Subtracting these two spectra and filtering the result produced a spectrum, which is a measure of the IR fluctuations in the scene. The resulting set of scene spectra were processed into aberrant noise, and deterministic groups by numerical filtering and statistical methods.

© 2006 Optical Society of America

OCIS Codes
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(030.5630) Coherence and statistical optics : Radiometry
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Remote Sensing

Original Manuscript: January 3, 2005
Manuscript Accepted: April 25, 2005

Virtual Issues
Vol. 1, Iss. 3 Virtual Journal for Biomedical Optics

Dennis F. Flanigan, Alan C. Samuels, Changjiang Zhu, and Francis D'Amico, "Noise, clutter, and determinism in infrared spectral signatures under varying meteorological conditions," Appl. Opt. 45, 799-808 (2006)

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