Formulation of DAG-TM Concept
The DAG-TM Concept was formulated as a coherent set of solutions to a series of key ATM problems (or inefficiencies) in the gate-to-gate operations of the current NAS. For each problem, one or more solutions were identified that could potentially solve the problem by utilizing distributed decision-making between the user (FD and/or AOC) and the ATSP. These solutions, known as concept elements (CEs), would potentially enable greater accommodation of user preferences and increased system capacity. A fundamental goal of the DAG-TM concept is the elimination of static restrictions, to the maximum extent possible. In this paradigm, users may plan and operate according to their preferences – as the rule rather than the exception – with deviations occurring only as dynamically necessary. Therefore, the DAG-TM concept elements were formulated to mitigate the extent and impact of dynamic NAS constraints, while maximizing the flexibility of airspace operations.
Outline of DAG-TM Concept Elements
Fig. E-1 presents an overview of the DAG-TM concept elements. A special concept element for universal information access/exchange covers all ATM operations from gate to gate. This concept element is presented first, numbered “CE 0” to indicate its over-arching nature. The other concept elements are numbered “CE 1” through “CE 14.” It is noted that CEs 1 – 14 each represent a solution to a problem/inefficiency in the operations of the current NAS. Their sequence corresponds to the progression of a typical flight. The CE titles include a label that indicates the applicable operational domain and flight phase (e.g., Terminal Departure). The label “Gate-to-Gate” applies to all operational domains and all flight phases.
CE Title
0 Gate-to-Gate: Information Access/Exchange for Enhanced Decision Support
1 Pre-Flight Planning: NAS-Constraint Considerations for Schedule/Flight Optimization
2 Surface Departure: Intelligent Routing for Efficient Pushback Times and Taxi
3 Terminal Departure: Free Maneuvering for User-Preferred Departures
4 Terminal Departure: Trajectory Negotiation for User-Preferred Departures
5 En route: (Departure, Cruise, Arrival) Free Maneuvering for: (a) User-preferred Separation Assurance, and (b) User-preferred Local TFM Conformance
6 En route: (Departure, Cruise, Arrival) Trajectory Negotiation for: (a) User-preferred Separation Assurance, and (b) User-preferred Local TFM Conformance
7 En route: (Departure, Cruise, Arrival) Collaboration for Mitigating Local TFM Constraints due to Weather, SUA and Complexity
8 En route / Terminal Arrival: Collaboration for User-Preferred Arrival Metering
9 Terminal Arrival: Free Maneuvering for Weather Avoidance
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本文链接地址：Concept Definition for Distributed Air/Ground Traffic Management (DAG-TM)(2)
