erat: new concepts to improve planning and environmental...
TRANSCRIPT
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ERAT: New concepts to improve planningand environmental performance in the TMA
Michael Portier
ERAT Project Coordinator, To70
ERAT Presentation April 2011
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• Brief overview of EU co-funded project ERAT
• ERAT concept for Stockholm Arlanda
• ERAT concept for London Heathrow
ERAT Presentation April 2011
Contents of presentation
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ERAT Presentation April 2011
ERAT objectives
• Reduce environmental impact (noise, emissions)
• Maintain current safety levels
• Maintain current capacity
• Concept development aligned with SESAR
• Operational concept deployable in 2015
The ERAT project develops and validates ConOps for the eTMA airspace of a medium and a high density traffic airport, in such a way that the environmental impact of air traffic in 2015 is significantly reduced while maintaining safety levels and airport and airspace capacity.
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ERAT Presentation April 2011
• ANSPs
• Airport operator
• Airline
• R&D establishments
• Aircraft manufacturer
• Engine manufacturer
• SMEs
Consortium partners across Europe
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• Project budget 6.8 M€ (of which 3.5 M€ EU contribution)
• Duration: Nov 2007 – April 2011 (3.5 yrs)
• 3 partners are also SESAR members
• 1 partner is a SESAR „founding father‟
• 1 associated partner of SESAR
• EU co-funded but supervised by SESAR JU
• SJU supports the ERAT project
ERAT Presentation April 2011
General project information
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ERAT Presentation April 2011
Schematic project WP setup
Development steps Stockholm Arlanda
London Heathrow
Inventory of concept elements
Define Validation plan
Define ConOps
Validate ConOps
Summarise findings
= work package
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LFV Green Flights…vision and objective!
Taxi Take-off En-Route Approach
Green Departure Green Cruise Green Approach
VISION up to 2012…
80% of all approaches shall be
offered to do Green Approaches
into LFV airports.
80% of all traffic flying over
FL285 shall be given opportunity
to fly the straightest route.
erat
ERAT Presentation April 2011
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ERAT Presentation April 2011
ERAT concept for Stockholm Arlanda
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ERAT Presentation April 2011
ERAT concept development work for Stockholm Arlanda
• Advanced AMAN development:– Enlarged planning horizon
(~40 min)
– 30-35 min freeze horizon
– CTA allocation functionality
– Include short flights (<30 min) in planning
– AMAN HMI integrated in controller working position
• A more realistic traffic generator: TrafficSim
• Design of P-RNAV STARs and short RNP STARs
• LFV will take an important step into time based operations (SESAR ConOps storyboard step 1)
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short flights
ERAT Presentation April 2011
AMAN planning horizon
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Standard Arrivals
ERAT Presentation April 2011
Closed P-RNAV STAR
with ILS approach:
• P-RNAV routes from TMA entry to runway 19L
• Controlled Time of Arrival, CTA waypoint, at 30 NM
• Aircraft passing CTA with accuracy of +/- 30 sec
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Standard Arrivals
ERAT Presentation April 2011
Short RNP STARs
RWY 19L:
• Less track miles
• CTA at 30 NM
• When vectors to ILS are needed, more demanding to recover for ATCOs
• Short RNP not used together with P-RNAV during ERAT
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ERAT Presentation April 2011
Visualisation of ERAT concept at
Stockholm Arlanda
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• Current aircraft capabilities / no new aircraft systems
• LFV already works with an arrival manager, but requires more advanced functions to improve predictability and efficiency of operations
• Two sessions of real time simulations, assessing:– Environmental benefits (noise and emissions)
– Capacity
– Predictability
– Efficiency
– Safety
– Controller operability and acceptability
– Flexibility
ERAT Presentation April 2011
Validation exercises for ARN concept
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• Improvements of arrival planning and predictability of operations, allowing an increase of CDAs
• 70-100% of the CTA capable aircraft successfully performed a CDA (~80% until runway)
• Improved planning benefits (hub) airline operations
• Concept proved to able to manage up to 30-34 arrivals per hour
• Small fuel burn & CO2 reduction for arriving traffic with potential for more
• Short flights are now included in arrival planning and can absorb delays on the ground rather than in the air
potential for more fuel burn/CO2 reductions
ERAT Presentation April 2011
Achievements of the Stockholm Arlanda concept (1/2)
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• Concept had no influence on continuous climbs (CCD)
• Reduced noise levels on the ground at some locations
• Current safety levels were maintained
• ATCo acceptability of concept and procedures was positive
• Simulations have demonstrated feasible advanced AMAN functions with associated HMI to run time based operations
• LFV ATCo: “most realistic real time simulation ever”
Limitations and remaining issues to be addressed in SESAR
ERAT Presentation April 2011
Achievements of the Stockholm Arlanda concept (2/2)
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ERAT Presentation April 2011
ERAT concept for London Heathrow
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ERAT Presentation April 2011
Heathrow current operations
• 4 holding stacks
• Tactical CDAs starting when leaving the holds
• Departures level off at 6000ft until clear of arriving traffic
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• Operational objectives:– Introduce higher start of CDAs
– Facilitate Continuous Climb Departures (CCD)
– Less holding stacks
– Higher holding levels
• Assumptions:– Current aircraft capabilities / no new aircraft systems
– Dependency on an implemented AMAN
– Aircraft are P-RNAV capable
• Two development cycles:– HEART1A (H1A) concept
– Refined LHR concept
ERAT Presentation April 2011
ERAT concept development work for
London Heathrow
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ERAT Presentation April 2011
ERAT HEART1A concept at Heathrow
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• One serie of real time simulation to validate H1A using the following scenarios:
– Full P-RNAV profile
– P-RNAV from IAF to a point late downwind, then vector to FAF
– Vector from IAF to a point early downwind, then P-RNAV to FAF
– Vector from IAF to FAF
– Baseline (current operations)
• Assessments:– Environmental benefits (noise and emissions)
– Capacity
– Safety
– Controller operability and acceptability
ERAT Presentation April 2011
Validation exercises for the LHR
Heart1A (H1A) concept
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ERAT Presentation April 2011
Baseline HEART1A
Visual comparison – descent profiles(density plots derived from RTS data)
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ERAT Presentation April 2011
Baseline HEART1A
Visual comparison – climb profiles(density plots derived from RTS data)
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ERAT Presentation April 2011
Visualisation of HEART1A concept at
London Heathrow
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ERAT Presentation April 2011
Validation results of HEART1A concept
• Main issue was that the concept did not support the required capacity
– Maximum landing rate achieved with closed transitions was 36 per hour (even in a simplified environment)
• A lack of a dynamic AMAN in the RTS impacted upon the results
– No dynamic arrival management meant that positive ATC intervention could not take place in en-route sectors
– Result was that the ATC intervention at the metering fixes was not taken into account
– Culminated in unrealistic use of outer holding, which skewed the results
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• Fast time simulation (AirTOp) to validate the following scenarios:
– Refined LHR concept
– H1A (to enable comparison between FTS and RTS results)
– Baseline (current operations)
• Assessments and tools:– Environmental benefits (noise with INM and emissions with AEM)
– Capacity (especially arrival rate)
– Safety
– Efficiency (e.g. impact on stack delay)
ERAT Presentation April 2011
Validation exercises for the LHR
refined concept
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ERAT Presentation April 2011
ERAT London Heathrow refined concept
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ERAT Presentation April 2011
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ERAT Presentation April 2011
Visualisation of ERAT London Heathrow concept (derived from FTS data)
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ERAT Presentation April 2011
Descent profiles(derived from FTS data)
Baseline ERAT_LHR
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ERAT Presentation April 2011
Climb profiles(derived from FTS data)
Baseline ERAT_LHR
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ERAT Presentation April 2011
Trade-off:
fuel burn reduction vs. noise reduction
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• Capacity maintained at current day levels (~ 42/hr/rwy) thanks to introduction of Point Merge
• Arrivals burn more fuel due to a 19% increase in distance flown
• The locations of the IAF have contributed to longer distance flown from the TMA entry point
• CCD has shown improved fuel efficiency and provides potential for more if cleared to cruise flight level
• Route design cause changes to noise contours where both local increases and decreases were found
• Workload is difficult to assess with FTS, but the expectation is that the use of Point Merge will contribute to reduction of R/T and workload (RTS validation by internal NATS project)
ERAT Presentation April 2011
Achievements of the London Heathrow refined concept
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• Extra miles flown can not be compensated with CDAs
• Holdings remain necessary as reservoir to maximise the runway capacity, however with higher holding and locations further away, fuel burn for arrivals can be reduced
• NATS is considering to maintain four holdings but to reduce the holding time per flight
• Trade-off between fuel burn reduction and local noise exposure on the ground
ERAT Presentation April 2011
Lessons learnt from the Heathrow
concept development work in ERAT
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ERAT Presentation April 2011
How ERAT achievements feeds into
SESAR work programme
• Concept development work
• Development of advanced AMAN
• Controlled Time of Arrival concept
• Environmental assessment methodologies
Various projects under WP5, like sub WP5.6(Queue Management in TMA
and En-Route)
WP6.8 (coupling AMAN-
DMAN) and sub WP10.9(ATC systems)
Project 5.6.1 (in
coordination with WP9 on
airborne systems)
environmental projects of WP16
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Thank you for your attention
www.erat.aero
ERAT Presentation April 2011