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1Federal AviationAdministration
Turbulence-related Efforts Within the FAA
July 27, 2010
Interagency Weather Research ReviewTurbulence
• Facilitator: Tammy Farrar, FAA Aviation Weather Group, Turbulence Project Lead
• Speakers:– Bob Sharman, “FAA AWRP-sponsored Turbulence
Nowcasts/Forecasts”– Wayne Feltz/Tony Wimmers, “Satellite-based
Inferences/Convection”– John Williams, “NASA-Sponsored Research in
Global DSS”
2Federal AviationAdministration
Turbulence-related Efforts Within the FAA
July 27, 2010
Back Up Slides
3Federal AviationAdministration
Turbulence-related Efforts Within the FAA
July 27, 2010
Turbulence Impact on Aviation• Threat to passenger and flight attendant safety
– From 1980 – Jul 27, 2010, Part 121, Enroute• 253 turbulence-related accidents• 28,934 total passengers carried
– 3 fatalities (0.01%)
– 122 serious injuries (0.42%)
• 1243 flight attendants, 556 pilots– 0 fatalities
– 204 (16.4%) serious flight attendant injuries, 0 pilot injuries
1Graphical Turbulence Guidance (GTG) Safety Benefits Analysis, MCR Federal, LLC, Oct 6, 2009.2http://www.faa.gov/passengers/fly_safe/turbulence/
4Federal AviationAdministration
Turbulence-related Efforts Within the FAA
July 27, 2010
Turbulence Detection AlgorithmEddy Dissipation Rate (EDR)
• Current Deployment– UAL: Accelerometer-based algorithm on ~100 757’s– DAL: Improved winds-based algorithm on ~80 737-700/800’s– SWA: Winds-based algorithm currently on 10 737-700’s for testing.
Planned deployment on ~340 total aircraft– Efforts begun to deploy onto 767 fleets at UAL and DAL– Possible deployment onto CON(UAL) 737 fleet– Possible upgrade to UAL 757 algorithm
• UAL & DAL data displayed on Experimental Aviation Digital Data Service (ADDS) In Situ Turbulence Viewer– Access restricted to participating airlines at this time
• DAL EDR Proof of Concept Demo– On-going thru Jan 15, 2011
5Federal AviationAdministration
Turbulence-related Efforts Within the FAA
July 27, 2010
Average 24 hour EDR coverageUAL ~100 a/c
DAL ~80 a/c
SWA 10 a/c
Images courtesy Research Applications Laboratory, NCAR
Projected GTG releases – next 7 years (updated 1 Oct 2010)
Version Capabilities Op. date*/enter CMTDGTG1 Upper levels 3/2003*
RUC20GTG2 Improved GTG1 2/11/2010*
+Mid levels+Uses UAL in situ
GTG2.5 13 km WRFRR 7/2011 cutout grids+VWA insitu (UAL+DAL+SWA)
GTG3 13 km WRFRR native grids 3/31/2012+MWT+Optimized use of insitu+1-18 hrs
GTGN1 NTDA2/DCIT/insitu 6/30/2012GTG3mid+upper levels, 0-15 min
GTG4 Improved GTG3 FY15+Ensembles/Probabilistic forecasts+all altitudes, full WRFRR domain
GTGN2 NTDA3 FY15+GTG4+0-FL450, 0-1 hr
Global GTG Global – GFS based FY15
GTG5 Improved GTG4 FY17+CIT/HRRR
GTG6 Improved GTG5 FY19< FL650
GTG1
GTG2
GTG5
GTG3
GTG5
GTG4
Source: P. Lester, “Turbulence – Anew perspective for pilots,” Jeppesen, 1994
Seg 1 versions
GTG6