Figure 2: Sequencer Model in Simulation Figure 2: Sequencer Model in Simulation
Requests are delayed for the estimated operation time
Completed Operations
Aircraft leaves
the system.
ACV is locked
Delay Model
New Requests
(Approach and departure)
Re-requests
Merge into thearrival stream.
System is locked: Requests are delayed
Traffic Generation
Sequence
Queue
Aircraft
re-request
Data
Collection/Reporting
ACV
ACV not locked
ACV Clearance granted
Figure 3: Typical Arrivals (10 hr Aggregate) Figure 3: Typical Arrivals (10 hr Aggregate)
constrained, planned hold or automated path stretch vector assistance as others have suggested in the references above. constrained, planned hold or automated path stretch vector assistance as others have suggested in the references above.
Provision of more information to the returning aircraft than simply when the airport was expected to reopen was found to decrease queue lengths (and is useful in non-normal operational considerations). By providing an estimate of a specific aircraft’s usage time (implying implicitly or perhaps explicitly sequence position as well), message traffic in the form of requests and responses was decreased dramatically, on the order of 75%. Provision of more information to the returning aircraft than simply when the airport was expected to reopen was found to decrease queue lengths (and is useful in non-normal operational considerations). By providing an estimate of a specific aircraft’s usage time (implying implicitly or perhaps explicitly sequence position as well), message traffic in the form of requests and responses was decreased dramatically, on the order of 75%.
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