中国区域GPS站海潮负荷形变特征分析

讨论5个全球海洋潮汐模型NAO99b、FES2004、GOT4.7、TPXO7.2和EOT11a在中国区域的差异性和适用性，并基于这些全球海潮模型和高分辨率区域海潮模型，分析中国区域GPS站海潮负荷形变特征。采用GIPSY软件对中国区域GPS站长时间观测数据进行处理，分析高精度区域海洋潮汐模型对中国沿海GPS站高精度位置时间序列的影响。分析表明，加入区域海洋潮汐负荷形变后，对GPS时间序列垂向的影响最大可达5.01 mm，可能会引起GPS时间序列中包含15 d和173 d 的虚假周期信号。

Analysis on Characteristics of Chinese GPS Station Deformation Induced from Ocean Tide Loading

We discuss the differences between, and applicability of, diverse global ocean tide models, such as NAO99b, FES2004, GOT4.7, TPXO7.2 and EOT11a, with respect to their adoption in the China area. Characteristics of deformation induced from the ocean tide loading in China GPS sites are analyzed on the foundation of the Global and high accurate local ocean tide models. GPS data from numerous field observations in China are processed by using GIPSY software, based on the two ocean tide model (with and without local ocean model) in order to analyze the influence of the high accurate local ocean tide on Chinese coastal GPS position time series. The results show that: this method can have an influence on the position, which can get to 5.01 mm in the vertical component, and may effectively induce false nominal signals with periods of 15 d and 173 d, without considering the deformation induced from local ocean tide in high data processing.