Abstract:This study uses earth tide data recorded with the gPhone gravimeter from January 2012 to February 2013 at Qingdao station. The tidal gravity parameters reflecting the characteristics of the station are obtained based on harmonic analysis after preprocessing of the gravity data, the gravity data are analyzed for various tidal waves (O1, K1, M2) based on eight global ocean tide loading models. The results show that (1) the amplitude factor standard deviation of eight major tidal waves are within 2.6%, and the discrepancies between the amplitude factors and the theoretical values are also within 3.0%; (2) the residual vector can be effectively reduced by using the global ocean tide model to correct the major tidal waves (O1, K1, M2), the validity of the observed residual load correction is roughly distributed over 30%-75%, and the global ocean tide model has little difference in the ocean tide load correction for the main tidal waves at Qingdao station.
DU Wencheng,UAN Linguo,HANG Ningning et al. Study of Earth’ s Gravity Tide and Oceanic Loading Characteristics at Qingdao Station[J]. jgg, 2018, 38(9): 913-916.