摘要
针对中期验潮站因观测时间较短而导致所得调和常数不稳定的实际,对中期验潮站海图深度基准面的确定方法进行了理论研究。分析了海道测量规范中求取海图深度基准面的方法;提出了一种利用差分订正来求取中期验潮站海图深度基准面的方法;并与《海道测量规范》及最小二乘拟和传递法两种方法进行了理论和实例对比分析。研究结果表明,差分订正方法用于确定中期验潮站海图深度基准面,具有更高的精度。
According to the characteristics of observations of the middle term tidal gauge,such as the instability of harmonic constants due to the short-term observation duration,the algorithm for determining chart datum values for the middle term tidal gauge in the specification for hydrographic survey is analysed.A new algorithm of determining chart datum values of the middle term tidal gauge based on the differential correction is presented in this paper.Both of the two algorithms are compared with real observations.The results show that the new algorithm has the higher accuracy than the one adopted by the specification for determining the chart datum values of the middle term tidal gauge.
出处
《海洋测绘》
2010年第5期9-13,共5页
Hydrographic Surveying and Charting
关键词
海图深度基准面
中期验潮站
调和常数
差分订正
chart datum values
middle term tidal gauge
harmonic constants
differential correction
