OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 9, Iss. 8 — Aug. 1, 1970
  • pp: 1789–1797

The Remote Detection of Clear Air Turbulence by Infrared Radiation

R. W. Astheimer  »View Author Affiliations

Applied Optics, Vol. 9, Issue 8, pp. 1789-1797 (1970)

View Full Text Article

Enhanced HTML    Acrobat PDF (2330 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Clear air turbulence (CAT) is frequently associated with horizontal temperature gradients of the atmosphere. An instrument has been developed for detecting such gradients remotely by sensing the infrared radiation emitted by the carbon dioxide in the atmosphere. Three of these instruments have been installed on commercial jet aircraft, to evalute this technique for providing advance warning of CAT. Many light turbulence encounters have been detected as much as 80 miles (130 km) (8 min) in advance. A high false alarm rate was experienced because of temperature gradients not associated with turbulence. No severe turbulence has been encountered to date. It is hoped that the temperature effects associated with severe turbulence will be large enough to permit establishing higher alarm threshold levels which will substantially reduce the false alarm rate. Future plans include evaluation of a vertical scan mode for detection of temperature inversions.

© 1970 Optical Society of America

Original Manuscript: January 15, 1970
Published: August 1, 1970

R. W. Astheimer, "The Remote Detection of Clear Air Turbulence by Infrared Radiation," Appl. Opt. 9, 1789-1797 (1970)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. P. W. Kadlec, “Exploration of the Relationship between Atmospheric Temperature Change and CAT,” Joint ION–SAE Conference on CAT, Feb. 1966, Washington, D.C.
  2. L. D. Kaplan, J. Opt. Soc. Amer. 49, 1004 (1959). [CrossRef]
  3. D. Q. Wark, H. E. Fleming, Monthly Weather Rev. 94, 351 (1966). [CrossRef]
  4. G. K. Mather, M. Weiss, in Proc. 5th Symp. Remote Sensing Environ., April 1968, University of Michigan.
  5. F. A. Mitchell, D. T. Prophet, in Clear Air Turbulence and Its Detection, Y. H. Pao, A. Goldburg, Eds. (Plenum Press, New York, 1969), pp. 144–82.
  6. W. L. Wolfe, Ed. Handbook of Military Infrared Technology (Office of Naval Research, Washington, D.C., 1965), Chap. 18.
  7. V. R. Stull, P. J. Wyatt, G. N. Plass, Infrared Transmission Studies, Vol. 3, , Space Systems Division, Air Force Systems Command.
  8. R. Jimenez, M. Weiss, “Some Results of Inflight Testing an Infrared Sensor as a CAT Detector,” 6th Symp. Remote Sensing Environ., Oct. 1969, University of Michigan.
  9. E. F. Flint, see Ref. 5, pp. 449–75

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited