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利用NAO.99JB大洋潮汐模型模拟浙江海域潮位数据。以沿海基线为界,对基线内进行调和分析,经调和分析得到各分潮调和常数,计算理论最低潮位面,即深度基准值。利用大洋潮汐模型模拟的潮位数据计算得到的深度基准值精度较差,不能满足要求。该文研究了一种“预测-校正”的方法对数据进行处理,即先采用“移去-恢复”作为预测值,然后采用强制改正作为校正值。经过“预测-校正”之后,数据精度可以达到厘米级,满足精度要求。
Simulation of tide levels in Zhejiang waters using NAO.99JB oceanic tide model. Taking the coastal baseline as a boundary, harmonic analysis is carried out on the baseline, and the harmonic constants of each tide are obtained by harmonic analysis. The theoretical lowest tide surface is calculated, that is, the depth reference value. The accuracy of the depth datum calculated by the tide level data simulated by oceanic tidal model is poor and can not meet the requirements. In this paper, we study a “prediction-correction” method to process the data, that is, using “remove-recover” as the predictor, and then using forcing correction as the correction value. After the “prediction - correction”, the data accuracy can reach centimeter, to meet the accuracy requirements.