Radai’s in-house developed EM survey system provides information about the electrical conductivity of the subsurface. The applications of the EM system include geological mapping, mineral exploration, groundwater and geotechnical investigations and environmental monitoring. Drone-based airborne system has the benefit of avoiding terrain obstacles and, thus, offers faster, safer, more cost effective survey data.

Key concept

• Semi-airborne system; fixed transmitter loop & airborne receiver
•  Depth of exploration 0-300 m
•  3 frequencies (2.3, 4.6, 9.2 kHz)
•  Joint inversion of EM & static magnetic data (fluxgate mag. attached to VTOL)
•  3-component EM receiver 
•  Towed by a VTOL drone
•  Flight speed ca. 20 m/s 
•  Spatial sampling ca. 20 m
•  Flight endurance ca. 75 min
•  1 Hz sampling