负载于零漂上的低频非潮汐信息的提取
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摘要
重力固体潮观测资料中的零漂项，从整体上看，在缓慢地变化着，本文以朔望月的一半作为时间长度，分段对零漂进行线性模拟。之后，再进一步消除长周期潮汐波对零漂的影响，提出了零漂的变化。这是一种低频非潮汐信息，它负载于零漂之上，可能含有地震前兆。
The zero drift term in observation data of gravity earth tide, on the whole, is in slow change. In this paper taking a half of lunar month as time length, the values of the zero drift are simulated linearly and piecewice.And then effect of long period tide wave on the zero drift is eliminated and the variation of the zero drift is drawn. This is a low frequency non-tide information which is carried on the zero drift and may contain earthquake precusor.
The zero drift term in observation data of gravity earth tide, on the whole, is in slow change. In this paper taking a half of lunar month as time length, the values of the zero drift are simulated linearly and piecewice.And then effect of long period tide wave on the zero drift is eliminated and the variation of the zero drift is drawn. This is a low frequency non-tide information which is carried on the zero drift and may contain earthquake precusor.
引文
［1］北京大学等院校，重力与固体潮教程。［2］李瑞浩，重力学引论，102．地震出版社。［3］A，P维涅第科夫，为处理固体潮记录组成的数字滤波，固体潮译文集，68－81，科学技术文献出版社，1980。［4］鞠正卫，陈文苗，概率与数理统计，黑龙江科学技术出版社。［5］中国紫金山天文台，1988年中国天文年历，2，天文出版社。
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