Abstract
NASA and FAA initiated a program in 1994 to develop methods for setting aircraft spacings in the air terminal area by incorporating information on the real-time behavior of aircraft wake vortices. The current wake separation standards were developed in the 1970’s when there was relatively light airport traffic and a logical break point by which to categorize aircraft. Today’s continuum of aircraft sizes and increased airport packing densities have created a need for re-evaluation of wake separation standards. The goals of this effort are to ensure that separation standards are adequate for safety and to reduce aircraft spacing for higher airport capacity. Of particular interest are the different requirements for landing under visual flight conditions and instrument flight conditions. Over the years, greater spacings have been established for instrument flight than for visual flight conditions.1
© 1995 Optical Society of America
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