Key concept
• Custom-made quad-copter
• Light-weight gamma spectrometer
• Low-altitude surveys

Custom-made UAV
• Dimensions Ø ca. 1.0 m
• Weight 8 kg (12 kg with batteries)
• Power source 2 x LiPo
• Flight speed 0-10 m/s
• Flight time up to 40 min with 3.5 kg payload
• Autopilot & inertial measurement unit (IMU) control drone flight
• Flight path defined by waypoints with DEM based altitude
• Flight controlled in real-time by PC software via a telemetry link.-

Gamma spectrometer

• 2 BGO or NaI/Tl crystals
• 25-3000 keV
• Integrated GPS
• Weight 3.5 kg
• Sample time > 2 s

GammaPros software

• Data processing software
Map coordinates (UTM or TM35FIN)
• Data summation
• Data normalization
• Output formatting