| 临时潮位站实时潮位质量控制方法研究 |
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| 引用本文： | 刘辉,朱世芳.临时潮位站实时潮位质量控制方法研究[J].海洋测绘,2020,40(3):28-30. |
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| 作者姓名： | 刘辉 朱世芳 |
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| 作者单位： | 上海达华测绘有限公司,上海 200136;上海达华测绘有限公司,上海 200136 |
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| 摘 要： | 为满足水上施工对临时潮位站实时潮位数据质量的要求,研究使用基于最小二乘的二次函数曲线拟合法将离散的潮位点拟合为潮位曲线,在此基础上实现潮位数据的补缺、加密和外推。在拟合节点的选取上除了传统的固定节点以外,还增加了滚动节点的拟合方式。以连云港徐圩潮位站的实测水位数据为依据,在不同的时刻计算拟合曲线,并给出了两种拟合节点的拟合外推潮位与实测潮位的比对分析结果,结果表明,滚动节点的拟合方式可以使拟合曲线的外推时间有所延长,在各种起始位置和节点质量条件下,在不超过20 cm偏差的前提下,潮位外推时间可达到50～300 min。
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| 关 键 词： | 实时潮位质量 临时潮位站 潮位外推 滚动节点 最小二乘 |
Research on Real-time Tidal Level Quality Control Method for Temporary Tide Station |
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| LIU Hui,ZHU Shifang.Research on Real-time Tidal Level Quality Control Method for Temporary Tide Station[J].Hydrographic Surveying and Charting,2020,40(3):28-30. |
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| Authors: | LIU Hui ZHU Shifang |
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| Institution: | Shanghai Dahua Surveying and Mapping CoLtd,Shanghai 200136 ,China |
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| Abstract: | In order to meet water engineering for real-time tide data quality of temporary tide station,the least squares quadratic function curve fitting method is used to fit discrete tide points to tide level curves, the tide data is encrypted, complemented and extrapolated on this basis. In addition to the traditional fixed nodes, the way to fit the rolling nodes is also studied.Based on the measured water level data of the XuWei tide station in Lianyungang, the fitting curve is calculated at different times, and the results of the comparison between the fitting extrapolated tide and the measured tide of the two fitting nodes are given.The results show that the fitting method of the rolling nodes can extend the extrapolation time of the fitting curve. Under various starting positions and node quality conditions, the tide extrapolation time can be up to 50~300 minutes under the condition of no more than 20 cm deviation. |
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