Patent ID: 8754649

Claim:
An electromagnetic survey system with motion-induced noise voltage compensation comprising: a pair of source electrodes with electric voltage applied between them; a towed streamer with an electromagnetic sensor pod that includes an electromagnetic sensor to detect an electromagnetic field parameter and to output a corresponding voltage signal indicative of an electromagnetic sensor measurement; a motion sensing unit associated with the electromagnetic sensor, wherein the motion sensing unit comprises, an accelerometer to measure acceleration motion perpendicular to an axis of said streamer; and a rotation sensor to measure rotational motion about said axis; and at least one processor that determines for the electromagnetic sensor: a motion signal as a function of time based at least in part on measured acceleration motion perpendicular to the axis and measured rotational motion about the axis, and a corrected electromagnetic sensor measurement from at least the voltage signal and the motion signal, wherein the corrected electromagnetic sensor measurement represents removal of an estimated motion-induced noise voltage from the voltage signal.