Concept Definition for Distributed Air/Ground Traffic Management (DAG-TM)(14)

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The reduction of delay propagation is a very powerful benefit mechanism. Considering the number of flights operating under the hub-and-spoke system, the performance of the entire NAS may be improved significantly. Although the integration of this benefit mechanism with various other benefit mechanisms is complex, this could contribute to meeting key objectives of the AATT project.
By reducing the downstream impact of delays in the system, the predictability of flights meeting their departure and arrival times is increased. When flights can repeatably meet their scheduled arrival times, the buffer added by airlines to their flight schedules (to compensate for variations in flight times) can be reduced. With the buffer reduced, the scheduled flight times between airports are reduced. Ultimately this will allow the airline resources to be scheduled to fill the excess periods that represent the sum of the removed buffer times. This means more flights (i.e., more capacity) and more revenue. If efficiency is measured in terms of profit, DAG-TM addresses both the reduction of operating costs and the increase of revenue. Both sides of the profit equation benefit. DAG-TM research will be conducted to confirm that these improved benefits outweigh the costs to equip the aircraft and the AOCs.

3.3 Air Traffic Service Provider (ATSP) Perspective
From the perspective of the ATSP, DAG-TM technologies/procedures will not only enable them to more efficiently manage all aircraft regardless of user equipage, but will also enable the ATSP to handle more aircraft at a time without an increase in workload. This will be accomplished through the following technologies and capabilities:
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Information exchange with the users, such as: . User preferences (aircraft and fleet) . Aircraft states and trajectory intent

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Predictive capabilities to forecast the potential need for future constraint applications, thereby facilitating user actions to reduce the severity of the constraints

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Improved predictability of aircraft trajectory maintenance, thereby allowing reduced excess spacing buffers

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Procedures and tools that allow user-ATSP collaboration to meet ATSP requirements while maximizing user benefit

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Advisory decision support tools to more effectively sequence and control aircraft

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Enhanced multi-sector and multi-facility interaction

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Advanced CNS capabilities.

 

3.4 Flight Deck (FD) Perspective
Every aircraft in the NAS will obtain some benefits regardless of their equipage level, with the level of benefits increasing as the level of equipage increases. While levels of equipage will vary among aircraft, the following technologies and capabilities will offer maximum benefits to the fully equipped flight deck:
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Information exchange with the ATSP and the AOC, such as: . Weather information access and displays . Winds aloft updates . SUA status . Traffic complexity parameters . Constraint information
　
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