Based on the tidal analysis using the 2-year data obtained from a superconducting gravimeter at Syowa Station, Antarctica (69.4°S, 39.6°E), and on the computations for the ocean tide effects using a new global ocean tide model by Matsumoto et al. (1995), we examined the tidal factors (8 factors) for the diurnal and semidiurnal tides at Syowa Station. As the a factors corrected for the ocean tide effects, we obtained the values of 1.144, 1.127, 1.157 and 1.111 for O
1, K
1, M
2, and S
2 waves, respectively. The discrepancies between the observation and Wahr's (1981) theory are at 0.5% for the diurnal tides and about 2% for the semidiurnal tides. Tudging from the consistency among the threeTadahiro Sato, Kazuo Shibuya, Kazunari Nawa, Koji Matsumoto and Yoshiaki Tamura observation results obtained by the three different gravimeters (Ogawa et al., 1991; Kanao and Sato, 1995; this study), and from the results for the computations of the ocean tide effects, it is highly probable that the large discrepancy exceeding 10% in the 8 factors for the semidiurnal tides at Syowa Station, which has been pointed out Ogawa et al. (1991), is mainly caused by their inaccurate estimation of the ocean tide effects.
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