Advanced Taxi Time Calculation considerably improves the accuracy of predicted on-block and take-off times. It is a key enabler for the effective integration of arrival and departure management with turnaround management. Pre-Departure Sequencing best possibly balances departure demand with existing runway capacity.

Our Pre-Departure Sequence Planner (PSQP) balances the departure demand with the available runway capacity. In case of a predicted over-demand at the runway, the traffic flow is automatically regulated by generating segregated Target Start-Up Approval Times (TSAT), thereby taking into account

• air traffic flow management constraints (CTOTs)
• scheduled departure times
• taxi times
• hold-over times
• airline preferences
• position conflicts
• tower freeze

To see how our Pre-Departure Sequencing tool is embedded in the A-CDM process at Frankfurt Airport, please refer to AIC IFR 5 (issued 21-Oct-2010 by German Air Navigation Services).

Our Advanced Taxi Time Calculation Module computes for each aircraft movement an individual taxi time. If movement data is available only in the Airport Operations Data Base (AODB), the predictions are based on information such as Estimated Landing Time (ELDT) or Target Off-Block Time (TOBT). As soon as an aircraft is detected by the airport's surveillance systems, the actual times and runways as well as the current position are determined. The calculation takes into account:

• runway capacity
• taxi velocities
• preferred taxi  routes
• push-back and engine start-up times
• traffic conflicts (queueing, converging traffic)
• runway occupancy times (take-off, landing, crossing)
• de-icing