GRAVIMETRIC METHOD TO DEFINE DEVIATION OF PLUMB-LINE IN OCEAN ON MOBILE OBJECT Russian patent published in 2009 - IPC G01C21/12 

FIELD: physics, measurements.

SUBSTANCE: invention relates to sea geodesy and can be used to define deviation of plumb-line (DPL) in ocean on a mobile object for navigation-hydrographic maintenance of its navigation complex. In compliance with the proposed method, four gravimetric devices are used to measure accelerations of gravity. For this, two gravimetric devices are moved on the object in horizon towards each other in the preset direction, and two gravimetric devices are moved in the direction perpendicular to the preset direction. Note here that the accelerations of gravity are computed at the moments of their meeting on traverse. Also, an absolute speed of the mobile object, speed of movement in horizon of the said gravimetric devices relative to the mobile object, true course, latitude, angle of object drift, radius of curvature of the trajectory of moving accelerometers and distance in vertical from gravimetric devices to water area surface are determined to computed, on their basis, the required DPL components values in meridian and in the first vertical.

EFFECT: increase in accuracy of defining DPL on mobile object and expanded performances of proposed method due to definition of DPL on meridian and first vertical.

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