METHOD OF DETERMINING STATIC GEOMAGNETIC FIELD DURING SEA MAGNETIC SURVEY Russian patent published in 2011 - IPC G01V3/40 G01V3/15 G01V3/16 

FIELD: physics.

SUBSTANCE: geomagnetic field variation is measured simultaneously with two or more magnetometric transducers mounted on mobile carriers placed along the direction of motion. An additional magnetometric transducer is placed 100-200 m from the sea surface on the vertical, said transducer being able to move along as well as across the direction of motion of the first transducer. The speed of the additional magnetometric transducer is at least an order higher than that of the first transducer. A second additional magnetometric transducer lying deep in the sea environment on a carrier is also used to measure geomagnetic field variations. The carrier of this transducer is a self-propelled control device fitted with navigation and hydroacoustic measurement and communication apparatus. The second additional magnetometric transducer can move along as well as across the direction of motion of the first transducer. During survey, inclination of the magnetic field vector is also measured, from which the ratio of gravitational field components V_zz and V_zx are determined.

EFFECT: high accuracy of determining static geomagnetic field.