Air Traffic Management and Systems: Selected Papers of the by Electronic Navigation Research Inst

By Electronic Navigation Research Inst

The digital Navigation examine Institute (ENRI) held its third International Workshop on ATM / CNS in 2013 with the subject of "Drafting the destiny sky".

There is world wide task happening within the examine and development of glossy air site visitors administration (ATM) and its allowing applied sciences in Communication, Navigation and Surveillance (CNS).

Pioneering paintings is important to give a contribution to the worldwide harmonization of air site visitors administration and keep watch over. At this workshop, top experts in examine, and academia from around the globe met to share their principles and ways on ATM/CNS similar topics.

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Extra info for Air Traffic Management and Systems: Selected Papers of the 3rd ENRI International Workshop on ATM/CNS (EIWAC2013)

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AIAA J Aircr 48(1):324–330 Reduced Wake Vortex Separation Using Weather Information Naoki Matayoshi Abstract Current wake vortex separation minima are a major impediment to increasing traffic capacity since they require greater separations than radar separation minima. The concept of dynamic wake vortex separation, which allows reduced separations in favorable weather conditions when wake durations on flight paths become shorter, would allow an increase in capacity. The Japan Aerospace Exploration Agency (JAXA) has developed a methodology that calculates a reduced wake vortex separation that is equally safe as current separation minima.

Figure 6 shows the four resulting weather avoidance paths. The entire path-finding algorithm can be repeated for different return waypoints, within a reasonable distance, to improve efficiency if desired. Since weather is often moving and changing, as discussed previously, this process relies on forecast weather for downstream cells. These forecasts are inherently uncertain, so it can be important to ensure some additional space around each weather cell. To create this space, a horizontal buffer distance may be used.

For example, when looking for weather conflicts at a point 10 min into the future along a predicted trajectory, polygons capturing the current forecast for weather 10 min into the future can be used. To simplify the subsequent discussion, the fact that downstream weather cells are actually forecasts is not highlighted. A. Lauderdale and H. Erzberger Fig. 1 Schematic of a complex weather scenario a b Fig. 2 Tangents can be found using a polygon (a) or a search if the polygon is not known (b) The core of the geometric solution relies on two simple algorithms: the first determines tangent lines from a point to the boundary of a (possibly) non-convex polygon, and the second calculates tangent lines between non-intersecting, nonconvex polygons.

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