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Certification Tool Set Updates Presented by  David Hamilton

Certification Tool Set Updates Presented by  David Hamilton. NASA Langley Research Center. Hampton, Virginia Airborne Turbulence Detection Systems (ATDS) Working Group Meeting 19-20 January 2005. Outline. Introduction TPAWS Certification Tool Set Current Status

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Certification Tool Set Updates Presented by  David Hamilton

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  1. Certification Tool Set Updates Presented by  David Hamilton NASA Langley Research Center Hampton, Virginia Airborne Turbulence Detection Systems (ATDS) Working Group Meeting 19-20 January 2005

  2. Outline • Introduction • TPAWS Certification Tool Set • Current Status • Opportunity for Data Set Enhancements • Summary and Conclusions

  3. Box 1: Model Data Sets • Box 2: ADWRS* • Box 3: Your Algorithm • Box 4: Hazard Tables* • Box 5: Hazard Metrics • Box 6: Scoring Tool TPAWS Tool Set Tool set components, reports, and data set descriptions can be found on TPAWS web site: http://tpaws.larc.nasa.gov/ • for testing airborne systems that are intended to detect turbulence hazard associated with atmospheric convection • useful for evaluation of detection system • available for anticipated FAA certification activity * Available to produce IQ for six aircraft types

  4. TPAWS Model Data Sets • Event 191-06 • Severe turbulence encountered at 10.3 km AGL on 14 Dec 2000 during NASA’s TPAWS flight tests. Event associated with overshooting tops of a convective line across FL panhandle. • Data set contains severe turbulence in regions of low radar reflectivity. • FOQA - Wilmington • Severe turbulence encountered by a commercial B-737 at 2.3 km AGL near Wilmington, DE, while on descent. Airliner vectored by ATC into leading edge of shallow convection with tops between 5-6 km. • Data set contains patches of moderate to severe turbulence in regions of low radar reflectivity. • 232-10 • Severe turbulence encountered by NASA’s B-757 during spring 2002 flight test. Encounter occurred in IMC conditions with “ship’s radar” displaying black and green. Exemplifies operational environment in which accidents occur due to turbulence. • Data set contains severe turbulence associated with low-reflectivity regions of rising cloud tops.

  5. Data Sets Enhancements • Proposed new (additional) and/or enhanced turbulence data sets for sensor development and evaluation. • Need for evolving/dynamic turbulence fields rather than static snap shots. • Fulfill needs for larger data sets at high resolution. • Will use real case events. • Provide more variety of convective turbulence events.

  6. Data Set Enhancements (cont.) • Major upgrade of NASA Supercomputer capability makes enhanced data sets possible. • NASA Supercomputer Columbia • Installed over the past several months at Ames • Full 20-server system clocked at a sustained speed of 51.9 teraflops (test completed last week) • Beats the computer at the top of a list of the world's 500 fastest machines.

  7. Columbia (SGI Altix):10,240 Intel Itanium-2 processors, storage system holds 440 terabytes of data

  8. Data Set Enhancements (cont.) • Much faster supercomputer provides capabilities to generate turbulence data sets at finer scales with larger domains. • Data volume can be much larger for longer range detection • Resolution can be increased (smaller grid spacing)… along with larger volume

  9. SUMMARY • Tool set includes: • Data sets representing environments where aircraft encountered convectively-induced turbulence • Hazard metric algorithms for data set Analysis/Truthing • Hazard “Look Up” tables • Radar simulation system (ADWRS 5.3) to produce IQ necessary for load predictions • Tools for evaluating turbulence detection systems • New data sets proposed with larger domains, finer resolution, and temporal evolution • Tool Set available from TPAWS web site: http://tpaws.larc.nasa.gov

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