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Enhanced Tactical Flow Management System - ETFMS |
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The ATFCM service is supported by the ETFMS system primarily for use in the ATFCM 'Tactical' operations (day of flight) but also for a large part of the 'Pre-tactical' operations (from 1-6 days prior airborne).
This system has two main functions:
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- the calculation of the traffic demand in every sector of concern within the CFMU area, using the flight plan information received from the Aircraft Operators (AOs) via the Initial Flight Plan Processing System (IFPS)
- the complex slot list calculation, allocation and distribution to the involved parties (ATC, AOs etc). This part of the system is called CASA (Computer Assisted Slot Allocation)
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The main purpose of the ETFMS system is to compare the traffic demand with the available ATC (sector) capacity.
In cases where demand exceeds the ATC sector capacity, the system woill make the information available to the Flow Management Controllers within the CFMU as well as to their Flow Management Position (FMP) colleagues in the various ACCs.
Together they decide whether or not to implement a 'regulation', delaying flights through the allocation of a departure slot and effectively moving the excess traffic out of the overload period. Re-routing information would also be provided.
The Enhanced Tactical Flow Management System (ETFMS) is first of all a tool relying on planned information i.e. flight plans, flight intentions. It receives real-time update messages on which it bases true re-assessments of the traffic situation.
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ETFMS receives surveillance data i.e. radar derived data provided by the Air Navigation Service Providers (ANSPs), position report data provided by the aircraft operators and, meteorological data.
ETFMS uses this data to update the existing data coming from flight plans and flow measures. The reception of this accurate real-time data allows ETFMS to re-calculate the current position and future trajectory of flights adding enormously to the accuracy of the data within ETFMS.
ETFMS provides the overall traffic situation for the CFMU area, both current and future, based upon flight plan data updated with current traffic position data, allowing a precise anticipation of the traffic demand.
ETFMS brings benefits in the management of both routine traffic situations as well as unusual or 'exceptional' conditions.
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Last validation: 04/08/2010
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