1. Systems and sensors Dr. Bertrand Dano ©Altapic.com, 2014

2.  Overview of the system Advantages of Balloons vs. Bladed-UAVS Systems and sensors  Gimbal system and controls  Sensors and applications

3. ALTA Flying Modes ALTA balloons can either:  Hover (single or multi tethers)  Drift

4. Balloon Aerodynamics  Tethered: flow laminar under the balloon.  Drifting: virtually no air flow.  Ideal to study wind and atmosphere

5. Quad+ Aerodynamics  Highly turbulent and re-circulating flow  Compromises air sample  Inadequate for atmospheric studies.

6. ALTA Gimbal System Provides: Geo-location Geo-location Image stabilization Image stabilization Image geo-referenced Image geo-referenced Stabilization is obtained using a high-performance GPS-Aided Inertial Navigation System. Advanced Kalman filtering algorithms to provide optimal estimates of position, velocity, and orientation.

7. ALTA Gimbal System 3-axis stabilization Pan Pan Roll Roll Pitch Pitch

8. ALTA Skypad Software Point and click Point and click Stare and Gaze modes Stare and Gaze modes Remotely controlled Instantly available anywhere in the world

9. ALTA SkyPad – Gaze mode

10. ALTA SkyPad – Stare mode

11. ALTA Cameras 5 Mpixel (visible spectrum) 5 Mpixel (visible spectrum) 5 Mpixel Near IR (Visible w/ red filter removed) 5 Mpixel Near IR (Visible w/ red filter removed) Thermal IR camera (FLIR) Thermal IR camera (FLIR) Multispectral camera (??) Multispectral camera (??)

12. Systems and sensors Data acquisition Onboard 8 channels ADC Onboard 8 channels ADC Geo-located (stored in image EXIF) Geo-located (stored in image EXIF) Categories Essential Essential Pollution Pollution Wind data Wind data Air content Air content Radioactivity Radioactivity …

13. Essential atmospheric data: Altitude Pressure Temperature Humidity IMU already provides: 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer, and a barometric pressure sensor.

14. Air Pollution: O 3 -Nox (MQ131) Methane (MQ-4) CO (MQ-7) … MQ series are semiconductor based sensors: Feature High sensitivity Fast response Wide detection range Stable performance and long life Simple drive circuit SO 2 NOx Urban Pollution

15. Gas Sensors: CO 2 (MG-811) O2 (ME3-O2) … MQ series are semiconductor based sensors: Feature High sensitivity Fast response Wide detection range Stable performance and long life Simple drive circuit O2O2 CO 2 Sea-Mangrove-Air gas exchange

16. Wind Data: Direction Magnitude (hot-film)

17. Air dust content: Particles/dust sensor (Smoke, pollen count) Radioactivity: Geiger counter 15g

18. Air dust content: Particles/dust sensor (Smoke, pollen count) Radioactivity: Geiger counter 15g

19. Questions ?

20. Thanks !

22. SO 2 NOx O2O2 CO 2 Sea-air gas exchange Urban Pollution Forest gas exchange