Using Simulation in NextGen Benefits Quantification · Each Portfolio Element Assessed Separately;...
Transcript of Using Simulation in NextGen Benefits Quantification · Each Portfolio Element Assessed Separately;...
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AvMet Applications, Inc. 1800 Alexander Bell Dr., Ste. 130 Reston, VA 20191
Using Simulation in NextGen Benefits Quantification
Alexander Klein July 22, 2014
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Simulation Model Spectrum Analytical models (e.g. Excel based)
Queuing/network models
Superfast-time simulation models Medium-to-high detail Entire NAS
High-fidelity fast-time simulation models Airport surface / TRACON Group of sectors to Center
Real-time Human-in-the Loop simulators
“Weather-aware” “NextGen-aware” Highly detailed Day-in-the NAS in 2 min
DART
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Airspace, weather and flows in the Northeast
ATL departure and arrival flows
LGA/EWR/JFK Flows
Individual reroute
NAS, 07/08/11, 00Z, 3,800 flights in the air
DART: Weather-Aware, Runway-to Runway, Superfast-Time NAS/ATM Simulation Model
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Examples of DART Supported NextGen Benefit Analysis Studies • NextGen technology elements
• DataComm, ELVO, NVS, RNP-E • Technology Portfolios • Equipage and traffic growth scenarios, e.g. through 2030
• NextGen weather products and tools • CSS-WX, NWP
• New procedures (Wx related), technology driven benefits • CATMT, EDR
• New procedures, safety concerns – dis-benefits • CRO, Winter weather
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DART Next-Generation ATM Study Example
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2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
Tentative NextGen Portfolio Deployment Schedule;DART Model Estimated Annual Savings vs. Same Year's Do-Nothing Baseline;
Each Portfolio Element Assessed Separately; ASQP Carriers, 2011 $$
Added Gain if Technologies1,2 and 3 Were DeployedTogether
Added Gain if Technologies1 and 2 Were DeployedTogether
Technology 3
Technology 2
Technology 1
A sample DART NextGen portfolio-of-technologies study output (including DataComm). This batch required 16,000 simulations, each representing a full day in the US NAS with 40-60,000 flights, weather, forecasts, and NextGen technology effects simulation, and took 5 days to complete.
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Improved Convective Forecast Accuracy – Benefit Analysis Using DART • A range of forecast product features evaluated in DART using an entire
convective season (instead of a handful of weather situations) • Simulated operational benefits (reduced excess operating costs) of:
• Improved forecast accuracy (from ‘current’ to ‘more accurate’ to ‘perfect’) • Use of convective echo tops forecast information • Operational impact of using finer weather grid resolution • More effective use of TMIs, more streamlined reroutes
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CoSPA with Echo Tops, 3D View
Wx at FL400 shown Flight N255QS cruising alt = FL430
FL
NC
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Back-up Slides
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DART for Assessing “Value” of Alternative ATM Strategies/Decisions (Realized or Needed)
Optimized solution: Airway J29 open to relieve traffic on VUZ playbook reroute; reduced MIT, less delay
Non-optimal solution: VUZ playbook reroute traffic uses standard route; J29 closed; heavier MIT, longer delays
Only the traffic using select NAS Playbook reroutes is shown; Color-coding by delay: 0-15, 15-20, 30-60, 60-120, >120 min arrival delay
J29 J29
VUZ VUZ
An Example
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Delays - DART Simulation (Actual Traffic Demand) w. LAMP En-route Rechecks vs. ASQP Arrival Delay - Summer 2011
DART
ASQP Relevant
Validation Using a Multi-Day Period
ZDC distribution of flight
altitudes NAS metrics obtained from DART over a multi-day period (e.g. an entire convective season) are compared with historical data from FAA statistics
NAS arrival delays – daily totals
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Validation Using a Multi-Day Period
NAS arrival delays – daily totals
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Cancellations - DART Simulation (Actual Traffic Demand) w. LAMP En-route Rechecks vs. ASQP - ASPM77 Airports - Summer 2011
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NAS cancellations – daily totals
Normalized RMSE is a measure of DART-vs-ASQP variance error over the entire convective season
Arr Delay Cnx Diversions
13% 16% 15%
Normalized RMSE
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Selected DART Output Metrics • Delays/Cancellations/Diversions/Reroutes Statistics
• Delays by type (ground, airborne, holding), cause (e.g. airport capacity, runway, en-route weather, GDPs, AFPs, etc.), and stage (departure, en-route, approach)
• Scope: by individual air carrier, by airport, and the NAS summary for the day • Excess operating costs can be computed from these outputs
• Hourly movements and delays for major airports • Traffic demand, directional capacity and occupancy for all Sectors/Centers
• Original demand, demand adjusted by DART, capacity degradation due to diagnostic and forecast weather, maximum and average occupancy every 15 min
• “Denied sector entry requests” as a measure of airspace availability • Sector events
• Entry/exit, altitude changes, vectoring, airway transitions, potential conflicts, etc.
• Airway weather impact statistics • Individual flight statistics (Dep/Arr times, route length, delays, Wx impact) • Flight plans and 1-min trajectories exported in flat-file TFMS/ASDI format • WITI metrics (en-route, TRACON, terminal, Centers, Flows)