A gnss tide level observation buoy dynamic draft correction device

Abstract

The invention discloses a dynamic draft correction device for a GNSS tide level observation buoy, which includes an attitude stabilization part and an attitude compensation part. The attitude compensation part includes a data fusion module, and the following formula is used to calculate the buoy dynamic draft correction value and the corrected real-time water surface earth height : ζ={(K+L 伸缩 )‑[(P 传感 -P 大气 ) / (ρ*g)] / cosθ}*cosθ, H 水 =H‑ζ, where: ζ is the buoy dynamic draft correction value, K is the correction constant, L 伸缩 is the length of the telescopic pole, P 传感 is the pressure value measured by the pressure sensor, P 大气 is the pressure value measured by the barometer, θ is the angle between the center line of the device and the vertical direction measured by the inertial measurement unit, H 水 is the corrected real-time water surface geodetic height, and H is the geodetic height measured by the GNSS positioning module. The invention can reduce the influence of wind, wave and tidal current on the attitude of the buoy, eliminate dynamic draft errors, and improve the tide level observation accuracy of the GNSS tide level observation buoy.

Description

technical field [0001] The invention relates to a dynamic draft correction device for tide level observation, in particular to a dynamic draft correction device for a GNSS tide level observation buoy. Background technique [0002] Ocean tide level data is an important element of ocean hydrological observation. The precise measurement and forecast of tide level has very important application value for navigation transportation, marine engineering, disaster prevention and mitigation, marine fishery, scientific research, etc. At present, the tide level measuring instrument is mainly used to measure the tide level. According to different working principles, it can be divided into float type and pressure type; according to the different deployment positions, it can be divided into two types: shore-based and offshore. In recent years, with the vigorous construction of my country's marine economy and the implementation of the "Maritime Silk Road" national strategy, there is an inc...

AI Technical Summary

Problems solved by technology

However, the attitude of GNSS tide level observation buoys is always affected by ocean wind, waves and tidal currents, and the dynamic draft error caused by them has not been effectively resolved, which seriously affects the measurement accuracy and application promotion of GNSS tide level observation buoys

The size of the dynamic draft error of the GNSS tide level observation buoy has strong randomness and contingency, and it is difficult to eliminate it through post-event data processing

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