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中文摘要：
为实现远岸潮汐精确监测及潮位海图高程转换,基于GPS事后动态处理技术（PPK）开展了远距离高精度潮位观测、提取及垂直基准面确定和转换模型构建方法研究。分别探讨了在锚定和走航情况下瞬时水面高程信号改正方法及潮位有效信息提取的最优截止频率,并给出了在不同情况下深度基准面大地高的计算方法模型及区域无缝深度基准面大地高构建模型。在实际试验中,基线距离在100km范围内,获得了基于深度基准的GPS潮位,精度优于10cm。
英文摘要：
Based on postproeessor GPS PPK technology, we carried out the research on long-distance tide observation and extraction, the determination of vertical datum and the construction of vertical-datum transformation model. A model for calculating a height series for instantaneous water surface was researched, mean while, the best cut-off periods for tidal extraction for anchored and on-the-fly status are proposed. Finally, based on long-term anchor PPK and tide-gauge tidal levels for different situations, a determination of MSL and chart datum as well as the models for calculating their geodetic heights were investigated and proposed. A method to establish a seamless chart datum geodetic height model is presented. An test project showed that the accuracy of GPS tide level reference to chart datum measurement method as presented in paper can be better than 10 cm when the GPS baseline is less than 100 km.
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