1. 1 SIERRA Aircraft and Payload Status

2. Science Instrumentation Evaluation Remote Research Aircraft (SIERRA) SIERRA complements other UAVs in the NASA science fleet by specializing in dangerous, low altitude missions that require larger payload capacity than Aerosonde class Airframe designed by NRL; systems development at NASA ARC First Flight October 2008 Payloads flown include: VIS/NIR Hyperspectral Imager (NASA Ames) LIDAR Profilometer (CU-Boulder) Ocean Color suite (NASA GSFC) MMS (NASA Ames) CO2/CH4/H20 (Los Gatos Research/Picarro) C-Band SAR (Artemis/BYU) UHF/L-band SAR (Mirage Systems) NASA SIERRA UAV Wing Span Length Height Wing Area Empty Weight Gross Weight Max Speed Cruise Speed Stall Speed (clean) Aspect ratio Rate of Climb CG Position Payload weight Payload power Duration 20 ft. 11.8 ft. 4.6 ft. 42.4 sq. ft. 215 lbs. 375 lbs. 79 kts. 55 kts. 30 kts. 9.43 545 ft./min. 29-32% Chord ~100lbs 28V DC 8-10 hurs Phil Schulyer, SIERRA crew chief with the aircraft carrying a GP-SAR

3. 3 3 Meteorological Measurement System (MMS) P.I.: Paul Bui Payload Description: MMS Primary Data: Navigational Data and Aircraft Attitude - GPS UTC Time 1 Hz - Position 3.9 m 1 Hz - Velocity 0.1 m/s 100 Hz - Attitude (pitch and roll) 1.0 mrad 100 Hz - Heading 1.5 mrad 100 Hz

4. 4 Picarro G2301-F 10Hz eddy-covariance flux analyzer modified for aircraft Previously flown in C- 130 and Twin Otters by Purdue (Shepson et al) and NOAA ESRL (Sweeney et al.) Uses cavity ring-down spectroscopy to measure CO 2 /CH 4 /H 2 O <6ppm + 0.3% H 2 O precision at 10Hz data rate PI: Dr. Laura Iraci, NASA Ames Research Center

5. 5 SIERRA RRV Payload SIERRA payload nose (Rear) MMS INU MMS Data system Picarro G2301-f Picarro Inlet tube 5-hole pressure probe nose cap Pump in fusilage

6. 6 Sample data from testflight at Crow’s Landing CO 2 ColumnH 2 O Column