METHOD OF MEASURING GRAVITATIONAL FIELD OF EARTH Russian patent published in 2020 - IPC G01V11/00 G01V7/00 G01V7/06 G01V7/16 

FIELD: physics.

SUBSTANCE: invention relates to geophysics and can be used to study the gravitational field in the World Ocean for navigation and hydrographic support of the forces of the fleet and the national economy. Proposed method involves preliminary measurements of gravity by means of a gravimeter installed on board a shipboard above an abyssal plain and creation of a model of the gravitational field of the Earth by combining the obtained data with data of the global model of the gravitational field of the Earth. Further, displacement speed of zero point of gravimeter and absolute value of measurements is determined. Current gravity measurements are carried out in the investigated area of the World Ocean and a regional model of the Earth's gravitational field is created. Velocities of displacement of zero point of gravimeter and absolute value of measurements by method of linear approximation of set of discrepancies are determined. Performing additional measurements of inertial vertical accelerations. Spatio-temporal position of the gravity meter is determined with subsequent calculation of Coriolis accelerations, earth and ocean tides and gravitational effect of atmosphere. Corrections are calculated for displacement rate of zero point of gravimeter and absolute value of measurements by calculation of difference between values of displacement speed of zero point of gravimeter and absolute value of measurements obtained during current measurements in investigated area, and corresponding values of displacement speed of zero point of gravimeter and absolute value of measurements obtained above abyssal plain. Additional corrections are calculated for inertial vertical acceleration, Coriolis acceleration, earth and ocean tides and gravitational effect of atmosphere and correction of measured values of gravity is introduced.

EFFECT: technical result is high accuracy of measuring the gravitational field of the Earth by taking into account systematic and random errors caused by disturbing physical factors and ambient conditions.

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