METHOD OF DETERMINING SEA LEVEL Russian patent published in 2012 - IPC G01W1/00 

FIELD: physics.

SUBSTANCE: height of the surface of the sea level is measured using recording devices. Upper moon's transit moments on a fixed geographic meridian are determined. Oscillation of the sea level is determined by analysing results of observing periodic components in time series. Harmonic constants are determined on the frequency spectrum of fictitious satellites. When analysing measurement results, the frequency spectrum is divided into equal time cycles with subsequent superposition thereof, where harmonic constants are determined for a separate fictitious satellite. The time variation of the tidal level at the measurement point under the effect of tidal forces is determined from phase shift. Change in the tidal phase is determined from the measured sea level values at fixed points of the sea, arranged in ascending values of the time interval between the closest preceding moment of the upper moon's transit and the moment of the upper moon's transit. Also, based on the variation of the amplitude of the harmonic component of the tidal height with time, the spatial variability of the onset of maximum tidal water after syzygy on the open sea is determined. Transformation of the amplitude, angular frequency and phase of the tidal signal harmonic is carried out via integral and linear Hilbert transformation.

EFFECT: broader functional capabilities.

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