Tropospheric Airborne Meteorological Data
Aviation Safety and SecurityReporting Program (TAMDAR) Case Studies of T, Q, and V for the 2003 ATReC
First THORPEX Symposium December 6-10, 2004 Montréal, Canada
Taumi Daniels1, John Murray1, Dan Zhou1, George Tsoucalas1, Robert Neece1, Phil Schaffner1, Dan Mulally2, Mark Anderson2, Kristopher Jensen2, Tony Grainger3, Dave Delene3 1 NASA Langley Research Center 2 AirDat, LLC. 3 University of North Dakota
1st THORPEX Symposium Montréal, Canada Outline
Aviation Safety and Security Program
• TAMDAR System Overview • Flight Profile • Case Study • Results •Summary
1st THORPEX Symposium Montréal, Canada TAMDAR Concept
Aviation Safety and Security Program
Icing Cockpit Display Temperature Pressure Altitude Humidity Time Ground Station Lat / Long Winds* Turbulence* True Airspeed* AirDat TAMDAR Other Aircraft Sensor *computed
1st THORPEX Symposium Montréal, Canada TAMDAR Sensor
Aviation Safety and Security Program
1st THORPEX Symposium Montréal, Canada TAMDAR System
Aviation Safety and Security Program
1st THORPEX Symposium Montréal, Canada TAMDAR Specifications
Aviation Safety and Security Program
Parameter Range Accuracy Resolution Temperature -70 to +55Cº +/-1Cº 0.1Cº Relative 0 to 100% RH +/- 5% < 136 m/s 1% Humidity +/-10% > 136 m/s Wind Speed +/- 3.1 m/s 0.51 m/s Wind Direction +/- 5º 1º Pressure 0-4.5 km +/-45.72 m 3.05 m Altitude 4.5 - 7.6 km +/-76.2 m 3.05 m Pressure 10-101 kPa 3 hPa 0.05 hPa True Airspeed 36-231.5 m/s +/- 2.1 m/s 0.51 m/s Turbulence 0 - 20 cm2/3 / sec N/A N/A Ice Detection 0.51 mm
1st THORPEX Symposium Montréal, Canada UND Cessna Citation II
Aviation Safety and Security Program
1st THORPEX Symposium Montréal, Canada Case Study 12/05/2003
Aviation Safety and Security Program
1st THORPEX Symposium Montréal, Canada UND Citation Altitude, 12/05/2003
Aviation Safety and Security Program
9000 8100 7200 6300 5400 4500 3600 2700
Pressure Altitude, m Pressure Altitude, 1800 900 0 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada UND Citation Airspeed, 12/05/2003
Aviation Safety and Security Program
150
120
90
60
True Air Speed, m/s True Air Speed, 30
0 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada Temperature 12/05/2003
Aviation Safety and Security Program
0 Citation TAMDAR -10
-20
-30 Temperature, C -40
-50 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada Relative Humidity, 12/05/2003
Aviation Safety and Security Program
100 90 Citation TAMDAR 80 70 60 50 40 30
Relative Humidity, % Relative Humidity, 20 10 0 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada Wind Speed, 12/05/2003
Aviation Safety and Security Program
60 Citation TAMDAR 50
40
30
20 Wind Speed, m/s
10
0 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada Wind Direction, 12/05/2003
Aviation Safety and Security Program
360 Citation TAMDAR 315
270
225
180
135
90 Wind Direction, Degrees Wind Direction, 45
0 15:32 15:36 15:40 15:44 15:48 Time, UTC
1st THORPEX Symposium Montréal, Canada Correlation Results
Aviation Safety and Security Program
Case Study Temperature Relative Wind Wind Day Humidity Speed Direction 12/3/2003 0.995 0.804 0.841 0.905 Entire Flight 12/5/2003 0.999 0.839 0.710 0.928 Take Off 12/8-9/2003 0.998 0.957 0.963 0.977 Correlation 12/13/2003 0.999 0.934 0.996 0.966 Sounding 12/14/2003 0.985 0.854 0.981 0.819 Sounding
1st THORPEX Symposium Montréal, Canada Temperature Results
Aviation Safety and Security Program
Case Study Day Mean ∆ (ºC)* STD ∆ (ºC) 12/3/2003 0.14 0.66 12/5/2003 -0.27 0.52 12/8-9/2003 0.57 0.21 12/13/2003 0.88 0.41 12/14/2003 0.33 1.8
*∆ is the difference in measurements
1st THORPEX Symposium Montréal, Canada Relative Humidity Results
Aviation Safety and Security Program
Case Study Day Mean ∆ (%) STD ∆ (%) 12/3/2003 6.3 16.3 12/5/2003 2.9 19 12/8-9/2003 -6.7 8.4 12/13/2003 -1.3 10.2 12/14/2003 -7.1 9.5
1st THORPEX Symposium Montréal, Canada Wind Speed Results
Aviation Safety and Security Program
Case Study Day Mean ∆ (m/s) STD ∆ (m/s) 12/3/2003 -0.89 4.4 12/5/2003 -0.11 1.3 12/8-9/2003 -0.41 1.9 12/13/2003 -1.8 1.7 12/14/2003 -0.57 4.2
1st THORPEX Symposium Montréal, Canada Wind Direction Results
Aviation Safety and Security Program
Case Study Day Mean ∆ (º) STD ∆ (º) 12/3/2003 -0.05 3.6 12/5/2003 -0.21 4.5 12/8-9/2003 -0.42 3.9 12/13/2003 3.2 4.3 12/14/2003 -1.1 8.6
1st THORPEX Symposium Montréal, Canada Summary
Aviation Safety and Security Program
• ATReC flight profiles of winter weather • Five case studies • TAMDAR sensor performed within specifications for temperature and winds in all cases • Three of five cases for relative humidity within specifications (RH calibration data extrapolation required)
1st THORPEX Symposium Montréal, Canada