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Progress in Turbulence Information – Product Research and Development

Progress in Turbulence Information – Product Research and Development. Presentation at the NBAA/FPAW Forum 19 Oct 2006 Bob Sharman NCAR/RAL sharman@ucar.edu. In situ Turbulence Measurement and Reporting System. Goal:

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Progress in Turbulence Information – Product Research and Development

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  1. Progress in Turbulence Information – Product Research and Development Presentation at the NBAA/FPAW Forum 19 Oct 2006 Bob Sharman NCAR/RAL sharman@ucar.edu

  2. In situ Turbulence Measurement and Reporting System Goal: • Augment/replace subjective PIREPs with objective and precise turbulence measurements. Features: • Atmospheric turbulence metric: eddy dissipation rate (EDR). • EDR can be scaled into aircraft turbulence response metric (RMS-g). • Adopted as ICAO Standard Status: • ~ 200 UAL aircraft now • Begin SWA fleet-wide implementation by June 2007, completed by end of 2007 (~400) • Delta, NWA ?

  3. EXP TURB FI UAL███████████ -- 20 Oct 2005 22:08:57Z FL 360 orient. 95 deg 'X'=aircraft, '+'=waypoint, '*'=route ' '=no_data, 'o'=smooth, 'l'=light 'M'=mod, 'S'=severe ---------(36nm to COWES)--------------- llll l*MMMMMMll 112nm lll ll*llMMMMlll llM*MMMMMMMl 108nm llM*MMlMMMMM llM*MMlllMM 104nm lMM*llll Ml*l 100nm l**l ll ol l*ll 096nm llllllllll*lll llllllllllll*ll 092nm llllllllllll*ll l llllllllll l*ll llllllll 088nm lllllMllMMlll*l lllllllll lllMMMMMMll * lllllllllll 084nm llllMMMMMMM ** llllllllllllll lllllMMMMMMl *llllllllllllllll 080nm llllllMMMMM *llllllllllllllll llllMMlMMM l*lllllllllllllll 076nm ollMMMlll l l*lllllllllllllll ollMMMllllllM*llll lllllll +STL llllllllllMMl+lll lllllll ll lll Mll*lll llllll 068nm ll llllllMMll*lllM llllll lll lllllllll*llMM llllll 064nm lll llllllll*llMM llllll l ll llllllll*lMMM lllMll 060nm lll llllllllllM*MMM lllMMMl ll lllllllMMlM*M MMllMMMM 056nm Ml llllllMMlM*M MlMMMMMM M l llllllMMlM*Ml MMMMMMMMM 052nm l lllllllllllM*MlllMMMMMMMMMMM lll lllllllllllMM*MllMMMMMMMMMMMM 048nm lll lll ollllllMM*MllMMMSSMMMMMMM llM llloollllllll*llllMMSSMMMMMMM 044nm llMMMlllollllllll*llllMMMSSMMMMMM llMMM llll lllll*llllMMMMMMMlMMM 040nm M lllllllllll*lllllMMMMMllMMM lllMMlllllll*llllllMMMlllllM 036nm MMllMMll ll*llllllllllllllM MMMlMMll lll*lllllllllll 032nm MMMllllll ool*l lll llll MMMlllllllol*l l 028nm MMMllllllMMl* lMMlll MMl* 024nm M M * M * 020nm MMll * Mlllll ** MMM +WELTS llll + llMMM lll * llMMM 012nm ll * llMM * 008nm * * 004nm * * valid ----------------X---------------- 2205Z -40nm (39.0N, 92.1W) +40nm NEXRAD in-cloud turbulence detection algorithm (NTDA) • Ground-based displays • Cockpit displays from uplinks • Scheduled for ORPG Build 10 NEXRAD update (operational 2009) • POD~80%, FAR~25% EDR severe In-cloud edr display NEXRAD or TDWR

  4. Turbulenceforecasts – GTG2 • Extends GTG1 to 10,000 ft MSL • Improved accuracy at upper levels • Uses UAL in situ data • Status • D4 scheduled for 16 Nov 2006 • Operational on ADDS early 2007

  5. GTG-N • Tactical avoidance tool • Merges all current turbulence observations • Updates every ~ 15 min • D3 expected 11/08 GTG grids CIT diagnostics Satellite data Conv. Wx nowcasts Graphic courtesy of virtualskies.arc.nasa.gov Cockpit display or alert ADDS: Dispatch, ATC, etc. In-situ reports, PIREPs, MDCRS winds and temperatures GTG-N NTDA grids

  6. NASA CAN: Relate CIT to gravity waves -> GTG-N Convectively-induced gravity waves and turbulence

  7. Global GTG • Uses NOAA’s GFS model • Diagnoses and forecasts of CAT > FL200 • Status • D3 was expected in 11/07 • Operational early 2010 • Delayed or cancelled Example: Brown’s index at FL320 06 Aug 2002 18Z Upper: RUC20 Lower: GFS

  8. ASCII display via thermal printer >40kft 30-39kft Cloud Top Height Product • Aircraft-relative display of cloud top height based on satellite IR temperature mapped to pressure level w/ global numerical model • Pacific, N. Pacific, and Gulf of Mexico • UAL uplink to cockpit testing on US-Australia flights • Status: D3 6/20/05, D4 delayed or cancelled Pacific

  9. GTG4 GTG1 GTG3 GTG2 GTG4 GTG5 Projected GTG releases – next 7 years Version Capabilities D3 D4 Op GTG1 Upper levels --- 3/03 3/03 RUC20 GTG2Improved GTG111/04 11/06 2/07 Mid levels RUC13 Text generation Uses in situ GTG3 Improved GTG2 11/07 11/08 2/09 MWT 10 km RR WRF Probabilistic forecasts GTG/TFO Global - GFS 11/07 11/09 2/10 GTG4 Improved GTG3 11/08 11/09 2/10 out-of-cloud turb forecasts GTGNRapid upates 11/08 11/09 2/10 in-cloud turb nowcasts in situ GTG4 0-2 hr analyses GTG5 Improved GTG4 11/09 11/10 2/11 Low levels Source: P. Lester, “Turbulence – A new perspective for pilots,” Jeppesen, 1994

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