TAMDAR AERIBAGO Validation Experiments (TAVE) - Memphis Wayne Feltz, Erik Olson, Sarah Bedka, Kristopher Bedka, John Short, Tim Wagner, and Scott Cultice University of Wisconsin - Madison SSEC/CIMSS

TAVE OUTLINE TAVE Experiment Description TAVE Dataset Overview TAVE-II Improvements Preliminary Validation Results

TAVE Logistics TAMDAR AERIBAGO Validation Experiment (TAVE-I and TAVE-II) 22 February - 08 March May - 27 May 2005

TAVE-I LOGISTICS Location: Memphis airport at Air National Guard Dates/Timing: 23 February - 08 March 2005 (14 days) Weather: Dry, cool, two periods of rainfall, very little in the way of high dewpoint events/convection Data: Made available in near real-time, netcdf format from anonymous ftp server  Radiosondes - 49 total launches  12 Tail Numbers with TAMDAR instrumentation (excluding the 3 with bad sensors) Web site:

TAVE-II LOGISTICS Location: Memphis airport at Air National Guard Dates/Timing: 16 May - 27 May 2005 (12 days) Weather: Ranging from dry cool to humid hot, good water vapor variance, very little precipitation Data: ftp://ftp.ssec.wisc.edu/validation/exper/tamdar  Radiosondes - 45 total launches (dropped morning launch)  28 Tail Numbers with TAMDAR instrumentation Web site:

Memphis Airport Location

Memphis ANG Deployment

AERIBAGO Details Size: 28 ft in length, Height 17 ft (tower) Power: Full power, 3 phase, 60 Amp Hubble all weather connection, we need to contract electrician for wiring Internet Accessibility: LAN already installed, phone line need (voice/data/cellphone), ethernet preferable but not necessary Grounding

AERIBAGO INSTRUMENTATION Vaisala DigiCORA III RS-92 GPS Sounding System Atmospheric Emitted Radiance Interferometer (AERI) GPS Receiver VAISALA Surface PTU Station VAISALA 25K Ceilometer

Instrument Summary Radiosondes - New system vertical temperature and water vapor, Vaisala RS-92 radiosondes, 20 preparation time, 1 1/2 hour flight time, realtime monitoring capability Surface Station - Vaisala sensors, one minute, p, t, q, v, u, tested and calibrated for accuracy at SSEC AERI - Vertical temperature and water vapor profiles to three kilometers at ten minute resolution within PBL GPS - Integrated total water vapor at half hourly time resolution must be at a stationary location for at least ten days Vaisala Ceilometer - Cloud base heights every ten seconds

TAVE AERIBAGO SETUP

Vaisala DigiCORA-III Receiver RS-92SGP Capable

Radiosonde vs TAMDAR Trajectories

Radiosonde Profile vs TAMDAR

TAVE-I and TAVE-II Quick Comparison TAVE-ITAVE-II Dates24 Feb – 08 Mar16 May – 27 May Unique Aircraft Tail #’s12 (3 not used)28 Number of Radiosonde launches per day 54 Total number of Radiosondes 4946 Total number of Radiosonde/TAMDAR matches Launch Times (UTC)0100, 1430, 1615, 2015, , 1505, 1915, 2215

GPS Receiver

Credit: Seth Gutman

Vaisala Surface Station

Vaisala Ceilometer

Atmospheric Emitted Radiance Interferometer (AERI)

AERI Thermodynamic Retrievals

Other Datasets Collected Radiosondes, GPS, AERI, Ceilometer, Surface station TAMDAR/ACARS Profiles from MADIS and converted to netcdf over Memphis RUC Analysis Profiles over Memphis Satellite, radar, and surface imagery GOES pwv, profiles All Available at: ftp://ftp.ssec.wisc.edu/validation/exper/tamdar/data/

Preliminary TAMDAR Thermodynamic Validation

Radiosonde Launch Procedure

TAVE Validation Datasets

TAVE-I Radiosonde Schedule Saab 340s arrive / depart in the following groups (local time): 7:35 - 7:55 Arrive 9:20 - 9:55 Depart 12:36 - 1:15 Arrive 14: :00 Depart 17: :00 Arrive 19: :50 Depart TAVE Radiosonde Launch Time Slots: 0100, 1430, 1615, 2015, 2300 UTC Up to 5 Launches per day Careful attention was paid to keep the radiosonde out of sun and allowing sensor to acclimate to outside environment for several minutes before launch

TAVE-II Radiosonde Schedule Saab 340s arrive / depart in the following groups (local time): 7:35 - 7:55 Arrive 9:20 - 9:55 Depart 12:36 - 1:15 Arrive 14: :00 Depart 17: :00 Arrive 19: :50 Depart TAVE Radiosonde Launch Time Slots: 0000, 1505, 1915, 2215 Local time Up to 4 Launches per day Careful attention was paid to keep the radiosonde out of sun and allowing sensor to acclimate to outside environment for several minutes before launch

Radiosonde Ascent Rate 5,000 ft, reached 5 minutes after launch ft/min ascent rate. 10,000 ft, reached 12 minutes after launch. 800 ft/min ascent rate. 24,000 ft, reached 30 minutes after launch. 700 ft/min ascent rate. 30,000 ft, reached 43 minutes after launch. 500 ft/min ascent rate. These balloons are smaller and lighter than the ones the NWS launches at 00Z and 12Z at numerous sites across the US.

Profiles Comparison Examples

Future Validation Improvements (From Last Workshop and New) Validation matches should be screened in the vertical as a function of horizontal distance between sensor to help account for horizontal variability of the water vapor (Done, Sarah Bedka will present next) Wind validation using GPS winds from radiosondes vs TAMDAR/ACARS measurements (Done, Ralph Petersen and Robert Neece) Time criteria can be tightened with more matches from future deployment (Done) Specific case study may be investigated Compute radiances from radiosonde data and then difference from AERI radiance to compute residual Peer-reviewed paper (in collaboration with Taumi Daniels)

Acknowledgements and Web Links of Interest TAMDAR Great Lakes Fleet Experiment: University of Wisconsin TAVE homepage: NOAA Forecast Systems Laboratory data viewer: I would like to acknowledge the support of Taumi Daniels at NASA Langley Research Center, Lt. Norvel Atkins of the Memphis Air National Guard, and Bill Wagner of the FAA.

Web product: Real-time TAMDAR validation  TAMDAR (Tropospheric Airborne Meteorological Data Report) is part of the Great Lakes Field Experiment  Unfortunately, it is mostly lower and midtroposphere

TAMDAR Possible Satellite Turbulence Verification Resource (Currently PIREPS Below) Credit: Kristopher Bedka In colloboration with Bob Sharman NCAR