belling the CAT in the sky

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Abstract
The CAT in the sky, which has created a variety of problems since aviation began, is being attacked by an extensive measurement program sponsored by the United States Air Force under the code name ALLCAT. Clear air turbulence data gathering programs at all altitudes important to modern aviation are described, and some of the meteorological applications of the data are pointed out. It is shown how a properly instrumented airplane can be used to obtain actual gust velocities. The power spectral and exceedance statistics methods used to incorporate gust measurement data in aircraft design procedure are summarized and illustrated. The article concludes that the program will be an important step in taming all the CATS.

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