Republic of Belarus REPORT on courses development for Eco-BRU TEMPUS Project Zilina, April 2015.
EUROCONTROL EXPERIMENTAL CENTRE1 AIRSPACE CONGESTION: Pre-Tactical Measures and Operational Events...
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Transcript of EUROCONTROL EXPERIMENTAL CENTRE1 AIRSPACE CONGESTION: Pre-Tactical Measures and Operational Events...
EUROCONTROL EXPERIMENTAL CENTRE1
AIRSPACE CONGESTION: Pre-Tactical Measures and Operational Events
ICRAT Conference, ZilinaNovember 22, 2004
Nabil BELOUARDYPhD Student @ ENST Paris
& EUROCONTROL Experimental Centre
EUROCONTROL EXPERIMENTAL CENTRE2
Air Traffic Management system
ATS (Air Traffic Service)
Air Traffic Control service
ASM (Airspace Management)
Allocation of airspace
ATFM (Air Traffic Flow Management)
Demand / Capacity balance
EUROCONTROL EXPERIMENTAL CENTRE3
Capacity values (ECIP 2004)
State ACC Code Hourly movements
Austria Vienna LOVV 147
Eurocontrol Maastricht UAC EDYY 258
France Paris LFFF 244
France Marseilles LFMM 210
Germany Munich EDMM 235
Germany Karlsruhe UAC EDUU 188
Italy Rome LIRR 186
Slovakia Bratislava LZBB 073
UK London EGTT 370
EUROCONTROL EXPERIMENTAL CENTRE4
Area Control Centre (EGTTC ACC)
Cross section
Opening Scheme
EGLMU EGLUS EGLMU
EGLMS EG26LME
EG25LMW24:0021:0013:0005:3000:00
Longitudinal sectionEG01LUW EG02LUE
FL 310
EG25LMWU EG26LMEU
FL 245
EG25LMWL EG25LMEL
FL 195
EUROCONTROL EXPERIMENTAL CENTRE5
Flight Plans
Point profile Time: Beacon: Route: FL 1631:EGLL:EGLLBPK6F:000 1634:*1LON:EGLLBPK6F:060
1635:CHT:EGLLBPK6F:060 1638:BPK:M185:060 1640:TOTRI:M185:134 1641:MATCH:M185:147 1643:BRAIN:M185:207 1644:DAGGA:M185:210 1644:*6CLN:M185:210 1645:CLN:L620:210 1647:ARTOV:L620:210 1652:REDFA:EHAMREDFA10:210 1657:SULUT:EHAMREDFA10:175 1700:SUGOL:EHAMREDFA10:100 1705:*SPL:EHAMREDFA10:070 1712:EHAM:EHAMREDFA10:000
Airspace profile min: Airspace: max 1631:EGMIDFI:1631 1631:EGT1ACC:1652 1631:EGTTACC:1652
1631:EILOND:1652 1631:EGTTBNN:1637 1631:EGCCTC2:1646 1637:EGTTLAM:1641 1641:EGTTDAG:1646 1646:EGTTRED:1652 1646:EGCCTC1:1652 1652:EHEB000245:1712 1652:EHM1245:1701 1652:EHSECT4:1700 1656:EHAAFIRT:1712 1700:EHAMTMA:1712 1701:EHACOD:1704
ATFM regulation Possible delay if flights across some ATC unit exceed capacity.
EUROCONTROL EXPERIMENTAL CENTRE6
Need for ATFM regulation
Demand exceeds available capacity in some periods
EUROCONTROL EXPERIMENTAL CENTRE7
Computer Assisted Slot Allocation
Dynamic and deterministic algorithm: 3 hours before requested take-off time
No change in Flight Plan is possible Delay affected = Argmax (regulations)
2 hours before take-off No more delay will be affected Delay can only decrease
½ an hour before take-off Slot is allocated for take-off
Uncertainties Will the aircraft take its slot ? Will the crossed sectors be congestion-free?
Take-off time T0 – 3 h
t1
T0 – 2 h
t2
T0 – ½ h t
T0 t1 (T0 – 2 h)
t2 var t1 var
t2 (T0 – ½ h)
EUROCONTROL EXPERIMENTAL CENTRE8
Efficiency of ATFM regulation
Collapsed sectors (groups) still suffer from over-delivery
EUROCONTROL EXPERIMENTAL CENTRE9
Why ?
Hypotheses Uncertainties
If all aircraft take off at its slot, regulation of CASA will be fulfilled
Severe weather New flight paths result from re-routing
Nonconformity of Capacity with Opening Scheme No warranty for constraints satisfaction
Aircraft failure to respect Air Traffic rules Irregularities in traffic shape
EUROCONTROL EXPERIMENTAL CENTRE10
Uncertainties
ZOOM
Period of 09:00 -13:00 Average uncertainty on EOT is close to zero Standard deviation is less than 10 minutes Small center, crossed in almost 10 minutes
Can’t generate130% of capacity (depicted by black color)
EUROCONTROL EXPERIMENTAL CENTRE11
Weather
Jet Stream Physical routes can be shift (traffic variability)
Aircraft coming from America are not concerned
Arr Dep
United States Canada
Central America
Northern Europe
Southern Europe else
United States 0 0 0 3 0 0
Canada 0 0 0 0 0 0
Central America 0 0 0 0 0 0
Northern Europe 6 2 0 58 67 7
Southern Europe 0 0 0 7 0 0
else 0 0 0 2 0 0
Distribution of aircraft that have eerie flight plans according to Departure and Arrival areas
EUROCONTROL EXPERIMENTAL CENTRE12
ACC Capacity vs. Opening Scheme
Traffic load in opened groups (Filed configuration) Bad from 13:00 to 21:00
Actual configuration ?
EUROCONTROL EXPERIMENTAL CENTRE13
ACC Capacity vs. Opening Scheme
Final demand and Regulated traffic curves are almost identical, no obvious limitation Flight demands comply with ACC capacity
constraints At collapsed sector level, capacity of activated
groups are exceeded Regulation at a Macro level (Centre) does not insure
a safe flow at micro level (Opening scheme) Trade-Off: Over-flow / Delay
Adaptive optimization of Opening Scheme to the observed traffic
Control of used ACC capacity value to prevent the congestion in groups
EUROCONTROL EXPERIMENTAL CENTRE14
Stochastic pre-tactical planning
Other traffic shapes of other sub-centers of London EGTT shows Compliance between Final demand and Regulated traffic
No excessive demand Compliance between Regulated and Current traffic
Smoothed uncertainty
No need for stochastic
EUROCONTROL EXPERIMENTAL CENTRE15
Over-delivery / Total delay trade-off Consistency problem between Macro / Micro layers
Will be investigated Possible if demand grows as fast as airspace resource
improvement
If demand continue increasing while capacity remains steady Regulation by ATFM delay will reach saturation Less aircraft are to be controlled if Long range flights are
isolated in a kind of uncontrolled highways (like over the oceans)
Conclusion