Dictionary:Figure of merit
A measure of the effectiveness of aeromagnetic survey aircraft compensation for maneuver effects. The sum, without regard to sign, of the amplitudes in nT of the 12 magnetic signatures recorded when the aircraft carries out 10 rolls, 5 pitches, 5 yaws peak-to-peak on north, east, south, and west headings over a period of 4–5 seconds. See Canada Geol. Survey (1991).