insert date 1 spectra sensors, inc and wvss ii meeting background david helms noaa/nws/ost
TRANSCRIPT
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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
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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
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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
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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)
Scene from the “Flight of the Phoenix” (1965)
WVSS IWVSS II
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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” funding2003:• Real-world field tests
accomplished (BAMEX)10000 15000 20000 25000 30000
0
5000
10000
15000
20000
25000
30000
WVSS Chilled Mirror
H2O
(p
pm
v)
Time (seconds)
400
500
600
700
800
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1000
Pre
ssu
re (
mb
ar)
BAMEX Flight 5/31/03
Static P
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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
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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
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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