Electromagnetics (EM) - System

The Multicopter borne Electromagnetic System is installed on a 25kg octocopter. It is called RADIO EM system. The EM system consists of a 3-component induction coil triple and a powerful data acquisition system. In its passive configuration it uses powerful remote radio transmitters set up in different parts of the world for military communications, which transmit EM fields in the very low frequency range (15 to 25 kHz). Potential targets include tabular conductors in a resistive host rock such as faults in limestone or igneous terrain. RADIO EM is effective in areas where the host rock is resistive and the overburden is thin. This EM system can be used as an active AEM system also. In this configuration grounded cable or loops are used and survey lines are flown perpendicular to these sources, which is called Semi-Airborne EM, since it uses a source on ground and the receiver is transported by the multicopter. It combines the features and advantages of ground and airborne methods and is designed for the exploration of deep mineral deposits up to 2 km depth.  	high sensitive EM sensor for semi-airborne and radio-EM measurements 	robust & reliable octocopter platform 	excellent flight-path accuracy  	terrain-following capability 	low operational cost 	high daily prodution rate, up to 60 line-km per day

Technical Data -Flight Platform

Configuration Octocopter (8 engines) Endurance 30 Min. with EM-Sensor Payload Max. velocity 15 m/s Payload capacity 9 kg Max. TOW 25.000 g Autopilot Waypoint Navigation, Terrain Following Go Home, Failsafe Features Temperature Range -5°C to +50°C Humidity 0% - 90%, not condensing Wind < 8 m/s (17.9 mph / 28.8 km/h) Mission Planning via Notebook or Tablet

EM Sensor

Sensor System weight 6.500 g Frequency Range 1 kHz - 524 kHz Chanels Hx, Hy, Hz Sample rate up to 524 kHz Synchronization GPS synchronized Storage Media Compact Flash Disk