A Method of Ocean Current Measurement Based on Surface Drifting Buoys

Abstract

The invention discloses a sea current measurement method based on surface drifting buoys, which comprises the following steps: obtaining the three-dimensional coordinates measured by four GNSS positioning modules on the surface drifting buoys respectively, and the attitude data of the surface drifting buoys measured by an attitude sensor; The attitude data of the drifting buoy corrects the three-dimensional coordinates measured by each of the four GNSS positioning modules; optimizes the three-dimensional coordinates of the corrected four GNSS positioning modules according to the installation positions of the four GNSS positioning modules; the optimized four GNSS positioning modules The three-dimensional coordinates of the positioning module are converted into longitude and latitude coordinates; the longitude and latitude coordinates of the surface drifting buoys, the instantaneous current velocity, current direction and instantaneous sea surface elevation of the surface drifting buoys are calculated through the latitude and longitude coordinates of the four GNSS positioning modules. The measurement method disclosed in the invention can obtain higher-precision latitude and longitude coordinates, and can measure the instantaneous flow velocity, flow direction and sea surface elevation of the sea area where the buoy is located.

Description

technical field [0001] The invention relates to the field of ocean current observation, in particular to an ocean current measurement method based on surface drifting buoys. Background technique [0002] The surface drifting buoy is a small ocean data buoy developed according to the needs of marine survey, environmental monitoring and scientific experiments. Its main function is to measure sea surface currents using the Lagrangian method. The positioning accuracy of the buoy is the main factor affecting its current measurement accuracy. At present, the positioning accuracy of surface drifting buoys is 10m, which cannot meet the current high-precision current measurement requirements. In terms of flow measurement data types, the current surface drifting buoys can only provide the average flow velocity measured by the Lagrangian method, and cannot provide the measurement functions of instantaneous flow velocity, flow direction, sea level height, etc., and cannot measure the o...

AI Technical Summary

Problems solved by technology

At present, the positioning accuracy of surface drifting buoys is 10m, which cannot meet the current high-precision flow measurement requirements

In terms of flow measurement data types, the current surface drifting buoys can only provide the average flow velocity measured by the Lagrangian method, and cannot provide the measurement functions of instantaneous flow velocity, flow direction, sea level height, etc., and cannot measure the ocean current field. Higher Resolution Observations

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