Definition: Aeromagnetic Survey
Aeromagnetic surveys measure variations in Earth’s magnetic field using high-precision magnetometers (0.1 nanoTesla sensitivity) and are flown using a helicopter, fixed wing, or ultra light aircraft, depending on location and topographic relief.
- An aeromagnetic survey is a common type of geophysical survey carried out using a magnetometer aboard or towed behind an aircraft. The principle is similar to a magnetic survey carried out with a hand-held magnetometer, but allows much larger areas of the Earth's surface to be covered quickly for regional reconnaissance. The aircraft typically flies in a grid-like pattern with height and line spacing determining the resolution of the data (and cost of the survey per unit area).
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