HIGH ALTITUDE CLEAR AIR TURBULENCE MODELS FOR AIRCRAFT DESIGN AND OPERATION
Final rept. 1 Mar 1966-30 Jun 1968
LOCKHEED-CALIFORNIA CO BURBANK
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This report presents the results of an analysis of the turbulence data derived from the high altitude clear air turbulence HICAT flight investigation and from the pertinent meteorological and geophysical data. The curves representing the power spectra have various slopes and shape. These curves are grouped into categories. One group of categories are predominantly cases of flights over mountains. A second group of categories are mostly from flights over flatland. Theoretical, statistical, and practical forecasting analyses in addition to flight records all indicate that large horizontal temperature gradients and large changes in vertical temperature gradient are closely associated with HICAT and conversely small horizontal temperature gradients and nearly constant vertical temperature gradients are closely associated with smooth air.
- Atmospheric Physics