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MSAW
TTCCAASS
2, 4, 8 min straight line track
projections
2, 4, 8 min straight line track
projections
TFM
Constraints
TFM
Constraints
Addition of Conflict Probe (URET)
allows “static” ATC constraints to be
removed with constraints imposed only as needed
Addition of Conflict Probe (URET)
allows “static” ATC constraints to be
removed with constraints imposed only as needed
Preferred Routes,
Altitude/Speed Restrictions,
Flight Strips
Preferred Routes,
Altitude/Speed Restrictions,
Flight Strips
ATC
Constraints
Decision Support Capabilities
Ground Stop,
Ground Delay,
SWAP
Ground Stop,
Ground Delay,
SWAP
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© 2000 The MITRE Corporation
Overview of URET
Benefits
• Efficiency
– Removing restrictions to flight
– User-friendly maneuvers for conflict resolution
• Productivity
– Increasing quality & capacity of service without proportional
increase in operating costs to service provider & user
– More effective utilization of sector team resources
• Safety Margins
– Increased situational awareness
– Timely and continuous notice of emerging problems
– Avoidance of time-critical, high stress traffic situations
38
© 2000 The MITRE Corporation
TMA
Traffic Management Advisor
&
pFAST
Passive Final Approach Spacing Tool
39
© 2000 The MITRE Corporation
Overview of TMA/pFAST
Benefits
Decision support tools that help
controllers ...
• Improved system throughput
– Acceptable aircraft sequencing
– Safe aircraft separation
• While providing benefits to users in
the form of
– Reduced delays
– Increased fuel efficiency
• And do NOT...
– Increase controller workload or
– Adversely affect system safety
Acknowledgement: NASA, Ames Research Center
40
© 2000 The MITRE Corporation
Overview of TMA/pFAST
Capabilities Overview
• The tools optimize and smooth
the flow of arriving aircraft, minimize
delays, and balance flow from Center
to TRACON
• They deliver aircraft at a rate near
the capacity of the facility and the
destination airports
– Sequence aircraft to:
• ARTCC Metering fixes
• TRACON handoff points
– Help absorb delay earlier in the
en route environment
• Increase controller situational awareness
• Maintain and generate statistics about traffic
flow
• TMA is an
En Route tool
• pFAST is a
terminal-area tool
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FAA’s Free Flight Modernization Initiatives(11)
