MARINE MAGNETIC SURVEY METHOD Russian patent published in 2010 - IPC G01V3/08 G01V3/40 

FIELD: physics.

SUBSTANCE: magnitude of magnetic field induction vector of the Earth (MFIVE) is synchronously measured using two scalar magnetometres placed on separate gondolas. The gradient of the magnitude of the magnetic field induction vector of the Earth is determined and then integrated on the traversed path. The integration results undergo low-pass filtration. The magnitude of the magnetic field induction vector of the Earth is further measured using two extra scalar magnetometres placed on separate gondolas, towed behind the vessel such that the system of four magnetometres is not in the same plane. Coordinates of the magnetometres are synchronously measured with the magnitude of the magnetic field induction vector of the Earth. During combined processing of the magnetometric data and coordinates of the magnetometres, triorthogonal components of the gradient of the magnitude of the magnetic field induction vector of the Earth are determined, as well as increase in magnitude of the magnetic field induction vector of the Earth relative the initial measurement point.

EFFECT: obtaining more accurate results.