AIRCRAFT trailing vortices can be influenced significantly by atmospheric conditions such as crosswind, turbulence, and stratification. According to the NASA 1994 and 1995 field measurement program in Memphis, Tennesses,~1 the descending aircraft wake vortices could stall or be deflected at the top of low-level temperature inversions that usually produce pro- nounced shear zones. Numerical simulations of vortex/shear interactions with Ground effects have been performed by several groups.~2-5 Burnham~6 used a series of evenly spaced line vortices at a Particular altitude to model the ground shear layer of the cross- Wind.
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