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EASA- HighIWC Final Meeting

EASA HighIWC (EASA.2011.OP.28). Presented by Airbus - CNRS (LATMOS/BOM – LaMP – SAFIRE). EASA- HighIWC Final Meeting. WP2 / Tasks 2.1 & 2.2: Falcon 20 Flight Tests Development Plan & Feasibility Study.

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EASA- HighIWC Final Meeting

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  1. EASA HighIWC (EASA.2011.OP.28) Presented by Airbus - CNRS (LATMOS/BOM – LaMP – SAFIRE) EASA-HighIWC Final Meeting WP2 / Tasks 2.1 & 2.2: Falcon 20 Flight Tests Development Plan & Feasibility Study EASA.2011.OP.28

  2. EASA-HighIWC Final Meeting F-20 Development & Feasibility: Original plan – 2 aircraft G-II & F-20!!… EASA.2011.OP.28 September 2012 EASA.2011.OP.28 Gulfstream-II (G-II) : primary A/C 1st flight level among levels -50°C, -30°C, -10°C: • in-situ high IWC/TWC characterization. Falcon 20 (F-20) : secondary A/C 2nd flight level among levels -50°C, -30°C, -10°C: • in situ and Doppler radar high IWC/TWC characterization. • Objectives F20: (i) retrieve in situ IWC/TWC on F20 flight level. (ii) validate the Doppler cloud radar estimates of IWC/TWC in HighIWC regions (retrieved from reflectivity and Doppler velocity) using G-II and F20 in situ data. (iii) spatial extrapolation (6 antennas!) of the validated radar estimates of IWC & PSD (Reff), for the new icing envelope calculations. April 2012

  3. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – Challenges… Crystal growth in convective clouds dominated by 3 major growth mechanisms: - aggregation ( crystal concentration.,..) - diffusion ( ice supersaturation, temp…) - riming ( existing crystals,  important supercooled droplet concentration.,..) Aggregation Diffusion Riming CPI (cloud particle imager): data CNRS-LaMP EASA.2011.OP.28 September 2012 EASA.2011.OP.28 • Ice particles span a large size range (µm to cm). Crystal appearance in convective cloud systems: - individual ice crystals (pristine ice), - aggregates of crystals (snowflakes), or - crystals that collided with supercooled droplets (more dense and spherical particles; graupel & hail). • Requirements for F-20 µF instrumental payload: • increase of maximum bulk TWC capability far beyond 1-2 g/m3, • quantitative measurement of small ice particle properties below 100μm size dependent crystal number and mass, • discriminate small crystals from supercooled droplets, • anti-shattering probe tips, inter-arrival time measurement & post processing. select a series of instruments to cover entire range of expected cloud particle sizes. April 2012

  4. EASA-HighIWC Final Meeting F-20 Development & Feasibility: G-II & F-20: state of art µF instruments EASA-HighIWC Final Meeting F-20 Development & Feasibility: G-II & F-20 -state of art µF instruments CDP, FSSP-100, CAS CDP PDI Droplet /crystalsizing (depolarisation, angularscattering) CAS-DPOL, CPSD SID, Polar Nephelometer, Holodec CIP, CIP-Grey, 2D-C 2D-S 2D-S, HSI CAPS • 4 under-wing pods for best instrumental configuration to be chosen. • Payload (under wing probes) alternations possible during campaign. PIP, 2D-P Crystal imaging (CCD camera, photodiode lineararrays) CPI, Hawkeye AI Nephelometer CPI VIPS Airbus Nephelometer PIP Nevzorov TWC / IWC, LWC-100, King-LWC Nevzorov Bulk IWC, TWC, LWC (Hot wiredevices, evaporators) CSI, (CVI + Hygrométrie) CIP Robust TWC / IWC probe IsokineticEvaporator Probe IKP EASA.2011.OP.28

  5. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – G-II payload… G-II instrument list: newestsophisticated instruments for TWC retrieval EASA.2011.OP.28

  6. EASA-HighIWC Final Meeting F-20 Development & Feasibility: G-II & F-20: state of art µF instruments EASA-HighIWC Final Meeting F-20 Development & Feasibility: G-II & F-20 – F-20 selected payload CDP, FSSP-100, CAS CDP PDI Droplet /crystalsizing (depolarisation, angularscattering) CAS-DPOL, CPSD SID, Polar Nephelometer, Holodec CIP, CIP-Grey, old 2D-C 2D-S 2D-S, HSI CAPS PIP, old 2D-P Crystal imaging (CCD camera, photodiode lineararrays) CPI, Hawkeye AI Nephelometer CPI VIPS Airbus Nephelometer PIP HSI Nevzorov TWC / IWC, LWC-100, King-LWC Nevzorov Bulk IWC, TWC, LWC (Hot wiredevices, evaporators) CSI, (CVI + Hygrométrie) CIP Robust TWC / IWC probe IsokineticEvaporator Probe IKP EASA.2011.OP.28

  7. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 –payload intercomparison EASA.2011.OP.28

  8. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – payload intercomparison… EASA.2011.OP.28

  9. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – payload intercomparison… EASA.2011.OP.28

  10. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – payload intercomparison… EASA.2011.OP.28

  11. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – installation on F20 … In situ microphysics instrumentation: Installation, Tests Flights - 4 available under wing pods : CDP-ROBUST combination probe (possibly PDI-ROBUST combination probe) 2D-S probe (10 µm – 1.28 mm; array of 128 photodiodes (10 µm pixel)) PIP probe (100 µm – 6.4 mm; array of 64 photodiodes (100 µm pixel)) CPI or CPSD or HSI - plus Nevzorov & RICE under fuselage. Below probes are acquired, mounted, and certified! CDP-ROBUST 2D-S CPI Imager PIP Nevzorov & RICE EASA.2011.OP.28

  12. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – cloud Doppler radar on F20… Cloud remote sensing instrumentation - 94 GHz cloud radar RASTA (6 antennas) • RASTA 94 GHz cloud radar (6 antennas): • Doppler velocity measurement • 3 radar beams looking down • 3 radar beams looking up • “3D” (antenna directions!) wind retrieval (Papazzoni 2010) • Terminal fall speed retrieval of hydrometeors • Combining reflectivity and fall speed for microphysics retrieval from cloud radar: • IWC, extinction, effective radius, NT(Delanoë et al. 2007) EASA.2011.OP.28

  13. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – cloud Doppler radar on F20… EASA.2011.OP.28

  14. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – instrument preparation F-20… • Workperformed on F20 payload and integrationfeasibility: design, modification, integration, and certification work • Nevzorov probe pylonmechanical and electricallengtheningperformed, certificationsuccessful2012. • Design, acquisition, installation (front part) & • certification of ROBUST probe on canister of CDP probe • 2D-S probe tipsupgrade: EASA.2011.OP.28

  15. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – instrument preparation F-20… • Workperformed on F20 payload and integrationfeasibility: combination probes, probe modifications, certification work: • CPSD new probe design (CNRS+DMT+SAFIRE) for F-20 (leightweight, open path model), probe ordered and successfullycertified. • Delivery in first half of 2013. Installation (cabin cabling, etc…) & flight tests to be performed before TC2 campaigns 2013 (F20 available). • Newest RICE probe model 0871LM5 • for supercooled water detection. • 1 EM compatibility & 1 measurementtest flight • performed for new Nevzorov + ROBUST-CDP + new RICE EASA.2011.OP.28

  16. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – expected progress (Darwin) … Darwin campaign data exploitation: main challenges and expected progress • Knowledge is very limited about the frequency of occurrence, conditions of formation, and microphysical and dynamical processes involved in the HighIWC regions encountered by commercial aircraft during the reported in-service events. • HAIC-EASA HighIWC project with measurement campaign in early 2014 primarily relies on the most precise estimation of IWC from different approaches. • In addition, the update of the icing conditions in Appendix D requires a large number of measurements (representativeness) : • foreseen 50 F/h F-20 and 100 F/h G-II. • Therefore our overall goal is to produce as many estimates of IWC from our instrumentation as possible and reconcile them through improvement of assumptions in retrieval techniques, joint use of different measurements, and closure analysis between measurements. EASA.2011.OP.28

  17. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – expected progress (Darwin)… Darwin campaign data exploitation: main challenges and expected progress • Estimate IWC from F-20 bulk IWC probes (Robust, Nevzorov, RICE):all bulk probes have limitations (collection efficiency not yet known, saturation, etc …) but IKP should be a reference probe for the others. • 3 IWC estimates from IKP, Robust, and Nevzorov probes. • 3 additional IWC estimatesfrom particle imagery using • (i) m(D) parameterizations, (ii) CPI image classification and (iii) radar reflectivity and T-matrix simulations. • Doppler cloud radar can estimate IWC from reflectivity + Doppler,m(D), A(D) and PSD over the whole vertical extent of the HighIWC regions. 1 IWC estimate ! • Closure analyses between these measurements should in principle reconcile these 7 different estimates of IWC in HighIWC regions. EASA.2011.OP.28

  18. EASA-HighIWC Final MeetingF-20 Development & Feasibility: G-II & F-20 – contingency plan… Here starts contingency plan *.ppt and discussion! EASA.2011.OP.28

  19. Ice Water Content of clouds at High altitude (EASA HighIWC, EASA.2011.OP.28) This document and the information contained are EASA HighIWC Contractors’ property and shall not becopied or disclosed to any third party without EASA HighIWC Contractors’ prior written authorization Project funded by the European Aviation SafetyAgency(EASA) EASA.2011.OP.28

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