Very Low-Frequency (VLF) systems for airborne / UAV surveys. The VLF survey technique is a passive electromagnetic method that utilizes distant, globally positioned transmitters to induce secondary responses in conductive geologic units to determine overlying conductive materials in the subsurface.
UAV VLF-EM system with dual 3-coil sensors. Designed for drone surveys.
Airborne VLF-EM system with dual 3-coil sensors. Designed for surveys with manned aircraft.