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Clear Air Turbulence: Detection by Infrared Observations of Water Vapor"Forward-looking" infrared measurements of water vapor from the C-141A Kuiper Airborne Observatory of the National Aeronautics and Space Administration Ames Research Center show large, distinctly identifiable, signal anomalies from 4 to 10 minutes in advance of subsequent encounters with clear air turbulence (CAT). These anomalies are characteristically different from the signals not followed by CAT encounters. Results of airborne field trials in which the infrared radiometer was used indicate that, out of 51 situations, 80 percent were CAT alerts followed by CAT encounters, 12 percent were "false alarms " (CAT alerts not followed by CAT encounters), and 8 percent were CAT encounters not preceded by an infrared signal anomaly or CAT alert.
Document ID
20000027705
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Kuhn, P.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Caracena, F.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Gillespie, C. M., Jr.
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
June 3, 1977
Publication Information
Publication: Science
Publisher: American Association for the Advancement of Science
Volume: 196
Issue: 4294
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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