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本文讨论取样间距为5s 的固体潮磁带数据的重取样及消除强地震干扰的方法。所提出的多项式拟合平滑取样方法(PFSS)使读带、平滑、取样同步进行。读带一结束,计算机内存就有了按给定间距的取样结果。由于只对有关点作格式变换和预处理,故可以节省计算时间;由于只存取样结果,故可以节省计算机空间。因此,这种方法适用于小间距而延续时间长的固体潮磁带数据。采用功率谱分析,并对 PFSS 方法的结果作了检验,证明这种方法具有良好的滤波功能。为了消除强地震干扰所引起的畸变,采用 Nakai 方法并给出迭代程序,也用谱分析作了检验。校正后的观测数据,其谱分析结果与理论潮结果相似。
This paper discusses the resampling of solid-tide tape data sampled at a sampling interval of 5s and the method of eliminating strong earthquakes. The proposed polynomial fitting smoothing sampling method (PFSS) makes reading, smoothing and sampling synchronized. With the end of reading, there is a sampling of computer memory at a given pitch. Because only the relevant points for format conversion and preprocessing, it can save computing time; because only sample results, it can save computer space. Therefore, this method is suitable for long-duration solid-tidal tape data with small pitches. Power spectrum analysis is used, and the result of PFSS method is tested to prove that this method has a good filtering function. In order to eliminate the distortion caused by strong earthquakes, the Nakai method was used and the iterative procedure was given, which was also tested by spectral analysis. The corrected observations show similar results to the theoretical tide.