Tidal Reduction Method Based on Temporal Tidal Time-Difference Variations

Liu Ju; Bao Jingyang; Zhou Wei; Xu Jun; Zhao Xianghong

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Tidal Reduction Method Based on Temporal Tidal Time-Difference Variations

机译：基于时间潮汐时差变化的减潮方法

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Technical developments in the positioning and depth detection fields have allowed for vast improvements in sounding results, but the effects of tidal reduction (TR) yet merit improvement; today, TR is the main factor that limits bathymetry precision. It is crucial to determine tidal time difference (TTD) between tidal gauges to conduct effective TTD-based TR. The influence of temporal TTD variations is usually ignored, and the temporal observation window to determine TTD is generally freely selected. In this study, temporal TTD variations were analyzed under the tidal constituent merging theory. Daily and hourly TTDs were compared and utilized to reduce the TR error during time difference method operation. At-sea experiments were conducted to contrast the effects of daily versus hourly TTDs on TR; the results indicate that hourly TTD is more precise and thus better suited to TR.

机译：定位和深度探测领域的技术发展已使测深结果得到了极大的改善，但减潮效果却值得改善。如今，TR是限制测深精度的主要因素。确定潮汐仪之间的潮汐时间差（TTD）至关重要，以进行有效的基于TTD的TR。通常忽略时间TTD变化的影响，并且通常自由选择确定TTD的时间观察窗口。在这项研究中，根据潮汐成分合并理论分析了TTT的时间变化。比较了每日和每小时的TTD，并利用它们来减少时差方法操作期间的TR误差。进行了海上实验，以对比每日和每小时TTD对TR的影响；结果表明，每小时TTD更精确，因此更适合TR。

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来源
《Marine Geodesy》 |2019年第5期|407-421|共15页
作者
Liu Ju; Bao Jingyang; Zhou Wei; Xu Jun; Zhao Xianghong;
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作者单位

Dalian Naval Acad, Dept Hydrog & Cartog, 667 Jiefang Rd, Dalian 116018, Liaoning, Peoples R China;

Dalian Naval Acad, Dept Hydrog & Cartog, 667 Jiefang Rd, Dalian 116018, Liaoning, Peoples R China|Wuhan Univ, Sch Geodesy & Geomat, Wuhan, Hubei, Peoples R China;

91550 Troops, Dalian, Peoples R China;

Dalian Naval Acad, Dept Hydrog & Cartog, 667 Jiefang Rd, Dalian 116018, Liaoning, Peoples R China;

Natl Marine Technol Ctr, Zhangzhou Base Preparat Off, Beijing, Peoples R China;

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正文语种 eng
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关键词
Derivative of water-level curve; least-square fitting; tidal reduction (TR); tidal time difference (TTD); time difference method;

机译：水平曲线的衍生物;最小二乘配件;潮汐减少（TR）;潮汐时间差（TTD）;时间差法;

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Tidal Reduction Method Based on Temporal Tidal Time-Difference Variations

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