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http://dx.doi.org/10.5140/JASS.2009.26.4.511

Detection of Ocean Tide Loading Constituents Based on Precise Point Positioning by GPS  

Won, Ji-Hye (Dept. of Geoinformatic Engineering, Inha University)
Park, Kwan-Dong (Dept. of Geoinformatic Engineering, Inha University)
Publication Information
Journal of Astronomy and Space Sciences / v.26, no.4, 2009 , pp. 511-520 More about this Journal
Abstract
In this study, the Ocean Tide Loading (OTL) constituents were detected by the Precise Point Positioning (PPP) technique using GPS. Then, the GPS estimates of OTL constituents were compared with the predictions of the ocean tide models. We picked three permanent GPS stations as test sites and they are ICNW, SEOS, and CJUN. To detect the OTL constituents using GPS, we created vertical coordinate time series at 10-minute intervals using the PPP approach implemented in the GIPSY software. Through the tidal harmonic analysis of this height time series, the four major constituents ($M_2$, $S_2$, $K_1$, $O_1$) were determined. The amplitude obtained from the GPS height time series of the OTL constituents showed best match with the model predictions at CJUN, while the phase showed closest match at ICNW. The amplitude accuracy of the $M_2$, which is the dominant factor out of the 11 major constituents, was 24.8% on average.
Keywords
GPS; ocean tide loading; FES2004; NAO.99Jb; tidal constituent;
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