Abstract:This paper investigates effects of different tide models on ocean tide loading displacements in coastal areas of China. We use GNSS continuous observation data from 23 coastal CMONOC stations and four ocean tide models--FES2004, EOT11a, TPXO7.2 and Chinasea2010. Firstly, tide wave parameters of the four ocean tide models are calculated, showing that discrepancies of tide wave parameters among different tide models can reach the centimeter-level in the up direction. Then we apply ocean tide loading corrections to the coordinate time series of 23 stations using tide wave parameters of these ocean tide models respectively. Results indicate that ocean tide loading correction has a great impact on wRMS of the coordinate time series. For most stations, wRMS is reduced by 10%~70% after correction. Compared with stations in other investigated coastal areas, the reduction of wRMS in the east China sea coastal area, which can be more than 50%, is most significant. Among four ocean tide models, the correction based on FES2004 is more remarkable, with wRMS reduction reaching 67.5%.
FAN Wenlan,JIANG Weiping,YUAN Linguo et al. Effects of Different Ocean Tide Models on OTL Correction in China’s Coastal Areas[J]. jgg, 2018, 38(6): 598-602.