Aerial EM Survey
Technical Explanation
An Aerial Electromagnetic (AEM) Survey uses airborne sensors (typically a helicopter-towed loop) to induce and measure ground conductivity over large areas. It maps subsurface features (like aquifers or mineral deposits) by detecting how different materials conduct electromagnetic signals.
Main requirements
Required when large areas need rapid subsurface mapping (e.g. groundwater or mineral exploration). Needs an aircraft (or drone) outfitted with EM instruments and flight clearances; best for broad, inaccessible or expansive survey regions.