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Optics Letters

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  • Vol. 3, Iss. 4 — Oct. 1, 1978
  • pp: 130–132

Infrared passbands for clear-air-turbulence detection

P. M. Kuhn, I. G. Nolt, L. P. Stearns, and J. V. Radostitz  »View Author Affiliations


Optics Letters, Vol. 3, Issue 4, pp. 130-132 (1978)
http://dx.doi.org/10.1364/OL.3.000130


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Abstract

Clear air turbulence (CAT) ahead of an aircraft can be detected in real time by an infrared radiometer. The alert time and reliability depend on the passband of the infrared filter used and the altitude of the aircraft. Preliminary results and analyses show that a nominal passband of 26 to 35 μm appears optimal to alert CAT from 1.5 to 6.0 min ahead of the encounter. The alert time increases with higher altitude as the atmospheric absorption, determining the horizontal weighting, is reduced.

© 1978 Optical Society of America

History
Original Manuscript: May 18, 1978
Published: October 1, 1978

Citation
P. M. Kuhn, J. V. Radostitz, I. G. Nolt, and L. P. Stearns, "Infrared passbands for clear-air-turbulence detection," Opt. Lett. 3, 130-132 (1978)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-3-4-130


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References

  1. P. Kuhn, F. Caracena, C. M. Gillespie, “Clear air turbulence; detection by infrared observations of water vapor,” Science 196, 1099–1100 (1977). [CrossRef] [PubMed]
  2. P. C. Patnaik, F. S. Sherman, G. M. Corcos, “A numerical simulation of Kelvin–Helmholtz waves of finite amplitude,” J. Fluid Mech. 73, 215 (1976); E. R. Reiter, “Stratospheric–tropospheric exchange processes,” Rev. Geophys. Space Phys. 13, 459–474 (1975); N. Possiel, J. R. Scoggins, “Curvature of the wind profile in the troposphere versus regions of CAT and non-CAT in the stratosphere,” Mon. Weather Rev. 104, 57–62 (1976). [CrossRef]
  3. M. A. Bender, H. A. Panofsky, C. A. Pesten, “Temperature gradients and clear-air turbulence,” J. Appl. Meteorol. 15, 1193–1199 (1976). [CrossRef]
  4. R. A. McClatchey, W. S. Benedict, S. A. Clough, D. E. Burch, R. F. Calfee, K. Fox, L. S. Rothman, J. S. Garing, “AFCRL Atmospheric Absorption Line Parameters Compilation,” AFCRL Technical Report 0096 (1973).
  5. W. Kaiser, W. G. Spitzer, R. H. Kaiser, L. E. Howarth, “Infrared properties of CaF2 and BaF2,” Phys. Rev. 127, 1950 (1962). [CrossRef]

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