Abstract 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.

中文翻译：

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基于时间潮汐时差变化的减潮方法

摘要 定位和深度检测领域的技术发展使得测深结果有了巨大的改进，但潮汐减少 (TR) 的效果仍然值得改进；今天，TR 是限制测深精度的主要因素。确定潮汐计之间的潮汐时间差 (TTD) 对进行有效的基于 TTD 的 TR 至关重要。通常忽略时间 TTD 变化的影响，一般自由选择确定 TTD 的时间观察窗口。在这项研究中，在潮汐成分合并理论下分析了时间 TTD 变化。每日和每小时的 TTD 进行了比较并用于减少时间差方法操作期间的 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；