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用球谐函数方法(SHM)计算了由Schwiderski海潮图和日本海海潮图引起的M2,S2,K1和O1各分潮波的综合海潮负荷参数.计算中采用了Pagiatakis(1990)地球模型的负荷Love数.结果表明SHM具有更高的计算效率和计算精度.为了真正实现±毫米的VLBI地壳运动测定精度和±0.1微伽的绝对重力测量精度,对未来海潮图模型,特别是日本海的海潮图模型的精度要求作了讨论.计算结果还表明不同地球模型的负荷Love数对计算的测站位移之差为0.7毫米,在目前测量精度下尚可以不作考虑.中国近海的海潮M2波对台北,上海,Daejeon,Okinawa,和Kagosima站的径向和水平分量位移影响可分别达±22.4~±1.0毫米和±05-±5.5毫米,表明中国近海高精度的海潮图模型对东亚测站的地壳运动高精度测量是十分重要的.
Using the spherical harmonic method (SHM), the integrated tide load parameters of each tidal wave of M2, S2, K1 and O1 caused by the Schwiderski tide chart and the Japan sea tide chart are calculated. The Pagatakis (1990) earth model load Love number.The results show that SHM has higher computational efficiency and computational accuracy. In order to truly achieve crustal movement measurement accuracy of ± 1 mm in VLBI and absolute gravimetry accuracy of ± 0.1 giga, the accuracy requirements of the future tide chart model, especially the tide chart model of the Sea of Japan are discussed. The calculation results also show that the difference between the Love numbers of different Earth models and the calculated station displacements is 0.7 mm, which can not be considered under the current measurement accuracy. The tidal M2 waves in the offshore of China are not valid for Taipei, Shanghai, Daejeon, Okinawa, and Kagosima The radial and horizontal component displacements of the stations can be respectively ± 22.4 ± 1.0 mm and ± 05 ± ± 5.5 mm, indicating that the high-precision oceanographic model of China’s offshore region has high accuracy for the crustal movement of the East Asia Station Very important.