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Spectra Sensors, Inc and WVSS II Meeting Background David Helms NOAA/NWS/OST

Spectra Sensors, Inc and WVSS II Meeting Background David Helms NOAA/NWS/OST. Outline. AMDAR (MDCRS) and WVSS WVSS I Post WVSS I WVSS II Team WVSS II Planning WVSS II Phase 1 WVSS II Phase 2 and Beyond Assessment. AMDAR and WVSS. AMDAR (MDCRS)

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Spectra Sensors, Inc and WVSS II Meeting Background David Helms NOAA/NWS/OST

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  1. Spectra Sensors, Incand WVSS II MeetingBackgroundDavid HelmsNOAA/NWS/OST

  2. Outline • AMDAR (MDCRS) and WVSS • WVSS I • Post WVSS I • WVSS II Team • WVSS II Planning • WVSS II Phase 1 • WVSS II Phase 2 and Beyond • Assessment

  3. AMDAR and WVSS • AMDAR (MDCRS) • A highly leveraged, high quality, and cost effective data collection (>200:1 cost advantage to radiosonde) • Uses air carrier “enterprise” systems to sensor and collect observations, including: • temp and wind sensors • data processing (e.g. ACMS) • air-to-ground coms (ARINC/SITA) • Part of WMO World Weather Watch (WWW) Observing Network and GEOSS • Used in Numerical Weather Prediction for over 10 years • WVSS is an extension of AMDAR 24 Hour AMDAR Data over CONUS

  4. WVSS I 1995-1999: • FAA AWRP and NOAA OGP Funded (>$10M) • Sensor developed by Goodrich • Tested in 1999 on 30 UPS B-757 • Thin Film Capacitor Sensor • Result: • Sensors failed after 3-6 months

  5. Post WVSS I - Regrouping 1999-2001: • Lessons Learned: • RH uncertainty significantly increases as speed approaches high Mach # • Environmental stress rapidly degrades TFC sensitivity • Avoid TFC • But… need remains for trans-tropospheric RH sensor that is capable of <5% RMS for sustained operational use (2-3 years) WVSS I WVSS II Scene from the “Flight of the Phoenix” (1965)

  6. Water Vapor Sensing System II Team

  7. WVSS II Planning 2001: • A new approach is developed: • Diode laser technology solves the Mach # problem and sensor stability • SpectraSensors takes the lead as the sensor developer 2002: • NWS provides WVSS II “seed” funding 2003: • Real-world field tests accomplished (BAMEX)

  8. WVSS II Phase 1 • AUG 04: Operational test and deployment plans developed • DEC 04: WVSS II STC is received from FAA • FEB 05: Phase 1 WVSS II installations commence and data is received in quantity • JUN 05: First Field Test Completed

  9. WVSS II Phase 2 and Beyond • FY06: RFP solicitation • Approx $1M for first year of deployment, potentially more in FY07+ • Phase 2 field test in spring 2006 • Includes sensor software and hardware “fixes” identified during phase 1 • Target 1,600 sensors deployed systems on national and international routes WVSS II Intake and Diode Laser

  10. Assessment • June 2005 Field Test assessment critical for showing system viability; reports from CIMSS in Dec 05; prelim results show good data through 6 km/500 hPa/18 kft • Model assessment will require 150 or more instrumented aircraft to have “economies of scale” impact from WVSS II (FY08) Radiosonde (purple) and WVSSII (black) Comparison April 26, 2005

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