漂航状态矢量修正海流测量数据方法研究

Research on the method of drifting state vector correction of ocean current measurement data

针对舰船在漂航状态(停航不抛锚)时,海流计实测数据不准问题,基于天气海况条件良好的试验海区,分析海流计数据误差原因,提出流速矢量修正海流计实测数据的方法,将修正后结果与《T-D值表》潮流推算值对比发现:13:20时刻的流向误差为0.6%,流速误差为3%;14:20时刻流向误差为1.6%,流速误差为0%,修正效果理想,误差较低,所以此方法对于漂航状态海流测量数据的修正是有效的;由此可知在浅海、近岸海域,漂航状态的舰船在海面风较小时,海流计的测量数据经流速矢量修正后精度较高,可用性较强,可以解决漂航状态海流数据不准问题。

Aiming at the problem of the inaccuracy of the measured data of the current meter when the ship is in the state of drifting(suspended without anchoring),based on the test sea area with good weather and sea conditions, the cause of the current meter data error is analyzed, and a method for correcting the measured data of the current meter is proposed.Comparing the corrected result with the estimated value of the tidal current in the "T-D Value Table",it is found that the flow direction error at 13:20 is 0.6%,and the flow velocity error is 3%;the flow direction error at 14:20 is 1.6%,and the flow velocity error is 0%.The correction effect is ideal and the error is relatively low, so this method is effective for the correction of the current measurement data in the drifting state;It can be seen that in shallow waters and inshore waters, when the drifting state of the ship has low sea surface winds, the current measurement data is corrected by the velocity vector, the accuracy is high and the usability is strong, which can solve the problem of inaccurate ocean current data in the drifting state.