Abstract: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.
JIA Dan,SHENG Chuanzhen,ZHANG Liting et al. Analysis on Characteristics of Chinese GPS Station Deformation Induced from Ocean Tide Loading[J]. jgg, 2016, 36(3): 206-210.