固体潮磁带记录的重取样及强地震干扰的消除
RE-SAMPLING OF TIDAL TAPE RECORDS AND ELIMINATION OF STRONG EARTHQUAKE NOISE
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摘要: 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.Abstract: In this paper, the re-sampling of tidal tape data at 5-second intervals and the method of elimination of strong earthquake noise are discussed.The polynomial fit smooth sample (PFSS) method is given in this paper. The PFSSsynchronizes tape reading, smoothing and sampling. The memory of the computer has already had sampling results in the light of the given interval as soon as the tape reading finishes. Since format translation and preprocessing are performed for the relevant points, computer time is minimized. And since only sampling results are stored, less computer space is required. So the PFSSis usefull for processing of tidal tape data of small interval and long duration.In order to check the results of the PPSS, analysis of power spectra is used. The calculated example shows that the PFSShas a good filtering function.Nakai method is used to eliminate distortion caused by a strong earthquake and an iterated procedure is given. The calculated results are checked by analysis of power spectra, top. The results of spectral analysis of observed data which have been corrected for earthquake noise are similar to the results of theoretical tide analysis.
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[2] Becker, M. De, B. Ducarme, Sampling and p:e——processing of tidal data of one minute interval,BIM, 91, 5992——5996, 1984.
[3] Godin, G., The analysis of tides, University of Toronto Press, 1972.
[4] Jetjsch, G., Automatic treatment and pre——processing of tidal data recorded at 1 min. intervals,BIM, 85, 5415——5424, 1981.
[5] 李鸿吉、薛恩、吴勇强,最佳数字滤波器及其应用,地震地质,1, 79——89, 1979.
[6] Melchior, P., The tides of the p:anet earth (second edition), Pergamon Press, Oxford, 1983.
[7] Nakai, S., Pre——processing of tidal data, BIM, 75, 4334一4340, 1977.
[8] Nakai, S., Revised method of the pre——processing of tidal data, BIM, 81, 4955——4961, 1979.
[9] Nakai, S,On the interpolation of interruption in tidal record, BIM, 85, 5457——54GG, 1981
[10] Plag, H. P., and Jahr, t,On processing of earth tidal data, BIM. 89, 5759——5786, 1983.[1] 陈冬生、李瑞浩、傅兆珠、翩大西,固休潮观侧数据中惜误数据的自动以别与改正,地壳形变与地震,4,42——46, 1984,
[2] Becker, M. De, B. Ducarme, Sampling and p:e——processing of tidal data of one minute interval,BIM, 91, 5992——5996, 1984.
[3] Godin, G., The analysis of tides, University of Toronto Press, 1972.
[4] Jetjsch, G., Automatic treatment and pre——processing of tidal data recorded at 1 min. intervals,BIM, 85, 5415——5424, 1981.
[5] 李鸿吉、薛恩、吴勇强,最佳数字滤波器及其应用,地震地质,1, 79——89, 1979.
[6] Melchior, P., The tides of the p:anet earth (second edition), Pergamon Press, Oxford, 1983.
[7] Nakai, S., Pre——processing of tidal data, BIM, 75, 4334一4340, 1977.
[8] Nakai, S., Revised method of the pre——processing of tidal data, BIM, 81, 4955——4961, 1979.
[9] Nakai, S,On the interpolation of interruption in tidal record, BIM, 85, 5457——54GG, 1981
[10] Plag, H. P., and Jahr, t,On processing of earth tidal data, BIM. 89, 5759——5786, 1983.
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