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TU Berlin

Inhalt des Dokuments

ASAS - Investigations Into Airborne Separation Assurance in a Distributed Interactive Simulation Environment

Prof. Dr.-Ing. G. Hüttig
Wissenschaftliche Mitarbeiter
Dipl.-Ing. E. Brämer
Eurocontrol Experimental Centre (EEC)



Multiple national and international initiatives deal with the design of advanced Air Traffic Management (ATM) concepts with the aim to enhance safety of future air transportation, increase capacity to match air traffic growth, and to provide a high degree of flexibility for flight operations and airspace users. For this purpose, current Air Traffic Control (ATC) procedures will need to be changed, and the separation distance between aircraft will need to be reduced. This may be achieved by enhancing communication links between aircraft and ATC as well as among themselves, improving the pilot’s ability to safely navigate his aircraft, and by increasing an ATC controller’s capacity to monitor flight operations through a higher level of automation to assist human operators to detect and resolve potential threats. This also implies that human operator roles and responsibilities in the future system will most probably change and that control tasks will shift from ground to the cockpit.

By implementing an Airborne Separation Assurance System (ASAS) including extended display features for current Electronic Flight Instrument Systems (EFIS) into the Airbus A330/A340 Full Flight Simulator (FFS) of TUB/ZFB (Berlin University of Technology / Zentrum für Flugsimulation Berlin), the project’s objective was to execute various experiments with focus on advanced air-air data link scenarios according to current Free Flight concepts and their impact on pilots in a modified ATC environment. In addition to present TCAS (Traffic Collision Avoidance System) logic and in the ongoing implementation process for FANS (Future Air Navigation System) technology, an ASAS shall permit to exchange trajectories and resolution proposals between aircraft and ATC or between conflicting aircraft directly. It could be demonstrated, that well adapted resolution algorithms, being appropriately displayed on EFIS displays according to a Human Centered Automation Approach (HCMA), can lead in the light of concepts like EATMS to equally safe but more economic air traffic procedures in dedicated airspace.

The Final Report summarises the activities completed at TUB to achieve the project's goal. It gives an overview of the realised system functionality which was implemented into TUB's ATM- network and especially the A330/A340 FFS. Furthermore, it describes the results of the concluding field experiments with professional airline pilots.


G. Hüttig, H.Fricke, E. Brämer [1996]: "Distributed Simulation For Advanced Research in Air Traffic Management - Linking an A340/A330 Full Flight Simulator to an ATM Simulator of Eurocontrols Experimental Centre"; Proceedings of the Conference - "The Progress and Direction on Distributed Interactive Simulations" - 6/7 November 1996, London, Great Britain.


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