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首页> 外文期刊>Journal of geodynamics >A stacking method and its applications to Lanzarote tide gauge records
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A stacking method and its applications to Lanzarote tide gauge records

机译：一种叠加方法及其在兰萨罗特岛潮汐仪记录中的应用

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摘要

A time-period analysis tool based on stacking is introduced in this paper. The original idea comes from the classical tidal analysis method. It is assumed that the period of each major tidal component is precisely determined based on the astronomical constants and it is unchangeable with time at a given point in the Earth. We sum the tidal records at a fixed tidal component center period T then take the mean of it. The stacking could significantly increase the signal-to-noise ratio (SNR) if a certain number of stacking circles is reached. The stacking results were fitted using a sinusoidal function, the amplitude and phase of the fitting curve is computed by the least squares methods. The advantage of the method is that: (1) an individual periodical signal could be isolated by stacking; (2) one can construct a linear Stacking-Spectrum (SSP) by changing the stacking period T_s; (3) the time-period distribution of the singularity component could be approximated by a Sliding-Stacking approach. The shortcoming of the method is that in order to isolate a low energy frequency or separate the nearby frequencies, we need a long enough series with high sampling rate. The method was tested with a numeric series and then it was applied to 1788 days Lanzarote tide gauge records as an example.
机译：介绍了一种基于堆叠的时间周期分析工具。最初的想法来自经典的潮汐分析方法。假定每个主要潮汐分量的周期都是根据天文常数精确确定的，并且在地球上的给定点随时间不变。我们在固定的潮汐分量中心周期T上汇总潮汐记录，然后取其平均值。如果达到一定数量的堆叠圈，则堆叠可以显着提高信噪比（SNR）。使用正弦函数拟合堆叠结果，并通过最小二乘法计算拟合曲线的幅度和相位。该方法的优点是：（1）可以通过堆叠来隔离单个周期信号； （2）可以通过改变堆叠周期T_s来构造线性堆叠频谱（SSP）； （3）奇异分量的时间周期分布可以通过滑动堆叠法来近似。该方法的缺点是，为了隔离低能量频率或分离附近的频率，我们需要具有足够高采样率的足够长的序列。以数字系列对该方法进行了测试，然后将其应用于1788天的兰萨罗特岛潮汐仪记录。

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  • 来源
    《Journal of geodynamics》 |2009年第5期|138-143|共6页
  • 作者

    Ping Zhu; Michel van Ruymbeke; Nicoleta Cadicheanu;

  • 作者单位

    Royal Observatory of Belgium (ORB), Avenue Circulair 3, 1180 Bruxelles, Belgium;

    Royal Observatory of Belgium (ORB), Avenue Circulair 3, 1180 Bruxelles, Belgium;

    Institute of Geodynamics of the Romanian Academy, 19-21, Jean-Louis Calderon St., Bucharest-37 020032, Romania;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    stacking period; singularity; tides;

    机译：堆放期;奇点潮汐;

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