基于调和常数的短期水位差分改正方法

在大面积的沿岸水深测量中,为了能够利用实测验潮资料和经实测资料订正过的相邻站的预报资料一起进行水位改正,从而使水位改正精度近似于用实测潮汐资料进行改正的目的,本文提出了基于调和常数的短期潮汐差分预报的方法,并从水位改正的频谱结构角度给出了合理性解释。实例分析表明:该方法可以达到10cm的改正精度,能够有效地降低临时验潮站的数量,满足困难地区的海道测量的需要。

Method of short-time tide differential correction based on harmonic constants

Aiming at the problem of short-time tide correction in offshore depth surveying of large area, the method of short-time tide differential correction is proposed based on harmonic constants. Then, the algorithm rationality is explained from the perspective of the frequency configuration of tide correction. Finally, the simulation results show that the tide correction precision is 10 cm, which can meet the requirement. Meanwhile, the method can reduce the quantity of the temporary tide stations effectively and provide the convenience to the hydrographic survey of difficult area.