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 Pressure Altitude Time Ground Station Lat / Long * 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 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 • 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