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AVAPS Flight Summary HS3 2012

AVAPS Flight Summary HS3 2012. NOAA ESRL Gary Wick Ryan Spackman Darren Jackson Dave Costa. NOAA AOML Michael Black Jason Dunion. NCAR Terry Hock Dean Lauritsen Charlie Martin Xuanyong Xu. Dropsonde Observations. Dropsonde Observations. Dropsonde Achievements.

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AVAPS Flight Summary HS3 2012

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  1. AVAPS Flight Summary HS3 2012 NOAA ESRL Gary Wick Ryan Spackman Darren Jackson Dave Costa NOAA AOML Michael Black Jason Dunion NCAR Terry Hock Dean Lauritsen Charlie Martin XuanyongXu

  2. Dropsonde Observations

  3. Dropsonde Observations

  4. Dropsonde Achievements • First operations with Ku communications: • Download raw D-files from AV-6 in flight • Real-time ASPEN processing • Near real-time posting of skew-T plot to MTS • Near real-time transmission to GTS • Reference to HS3 sonde data in NHC forecast discussions for Nadine • Plans for parallel GFS model runs • Dropsonde deployment flexibility in various Atlantic FIRs (e.g., box module insertion in real time)

  5. AVAPS Lessons Learned Flight Ops 1 – Two AVAPS team members required in the PMOF: Dedicated drop operator necessary because of intensive comms AVAPS science seat coordinates drop pattern and any changes with mission scientists and shuttles data to processing team 2 – Additional team required for real-time processing Instrument Issues 1 - Parachute cap manufacturing anomaly being addressed 2 – RF noise interference issue is under investigation

  6. Science Directions • Tropical-extratropical transition: trough interactions • Aerosol-cloud-precipitation interactions: Role of SAL • HS3 science investigations: Build collaborations with investigator teams that are using the dropsonde data Courtesy of G. Wick, NOAA

  7. Dry, stable continental air Dry, stable SAL Moist core Sep 26 Nadine Mission • How could Nadine survive and even flourish in such a dry, stable environment? • Is the core within a “protected pouch”? • How does convection overcome the stable low-level environment and inversion? • Are differences in SST and surface air temperature important to enhance surface fluxes? Courtesy of M. Black, NOAA

  8. NASA Global Hawk – HS3 2012 AVAPS 400 MHz Telemetry Noise Problem Data Playback Screen Captures of: AVAPS 400 MHz Receiver Data (R-file) AVAPS 400 MHz Spectrum Analyzer NASA Global Hawk IWG1 Aircraft Data

  9. HS3 2012: Case 1 – Science Flight #1 (transit) • Dropsonde RF Signal Strength vs Time for First 6 drops Normal AVAPS ‘no signal’ noise floor

  10. HS3 2012: Case 2 – Science Flight #2 • Dropsonde RF Signal Strength vs Time for First 6 drops Why has the ‘no signal’ noise floor increased on Drops 2 through 6 (shown here) and all subsequent drops? Drop 1, the ‘Bermuda’ drop

  11. HS3 2012: Case 1 – Science Flight #1 (transit) • Two AVAPS 400 MHz Spectrum Analyzer data frames prior to takeoff • Note average noise floor jump from ~ -110 dBm to ~ -102 dBm • These plots are 6 seconds apart in time UTC Time - 20:16:00 UTC Time - 20:16:06 approx mean: -102 dBm approx mean: -110 dBm

  12. HS3 2012: Case 1 – Science Flight #1 (transit) • GH IWG1 data prior to takeoff UTC Time of cursor 20:16:06 (same UTC time as 2nd AVAPS Spectrum Analyzer plot) GH Aircraft Heading 20:16:06 Z ground taxi begins  GH Pressure Altitude GH Takeoff ^

  13. HS3 2012: Case 1 – Science Flight #1 (transit) • Zoomed-in detail of previous IWG1 aircraft data slide UTC Time = 20:16:06 GH Aircraft Heading 20:16:06 Z ground taxi begins 

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