Wake Vortex Advisory System Implementation at Orly Airport for Departing Aircraft

The work done at Service Technique de la Navigation Arienne (STNA) on wake vortices has led to the establishment of relationships between wind characteristics and potential hazards for a following aircraft. The methods that define these relationships and their validation are presented. Separation between aircraft is defined from our model as varying between 80 and 30 s for either a total wind of 12 to 20 kt or a crosswind of 5 to 8 kt. Based on these results, a first version of SYAGE (SYsteme Anticipatif de Gestion des Espacements) has been defined which considers only a temporary change of the current separation matrix. This version of SYAGE will be applied only to take-off from a single runway because of the difficulty of forecasting wind characteristics, as would be required for a system applied also to landing. To optimize the system’s efficiency, it is planned to link SYAGE 1 to a meteorological interface and to the Surface Movement and Guidance Control System (SMGCS) now under development. The objective is to realize a wake vortex advisory system (WVAS) for departing aircraft. Prior to implementing the WVAS at Orly Airport, a demonstration is planned to provide experience for controllers and pilots.