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为获得更多的非潮汐变化信息,基于函数距离的概念,探索固体潮畸变的提取方法。以新疆地区地倾斜观测为例,计算倾斜固体潮观测值与理论值之间接近度的阶数,并分析其变化特征。结果表明:①接近度的阶数从几何意义上讲是两条曲线的相似程度,将其应用于固体潮研究,可以反映固体潮实际观测值相对于理论值的畸变程度。②通过频谱分析,选取实际观测值中周期小于1.33天的潮汐波成分与理论值进行接近度阶数的计算,既可以保留固体潮的主要成分,又可以将多个潮汐波发生的畸变加以综合分析,突出短期变化。③新疆地区地倾斜整点值数据的计算结果显示,在某些中强地震前,部分台站倾斜固体潮接近度的阶数出现过下降变化。
In order to get more information about non-tidal changes, the method of extracting solid tide distortion is explored based on the concept of function distance. Taking the case of ground tilt observation in Xinjiang as an example, the order of closeness between the observed value and the theoretical value of tilted solid tide is calculated, and its variation characteristics are analyzed. The results show that: ① The order of the degree of similarity is geometrically similar to the degree of similarity between the two curves. Applying it to the study of solid tide can reflect the degree of distortion of the observed value of solid tide relative to the theoretical value. (2) Through frequency spectrum analysis, the tide wave component and the theoretical value of the actual observation value less than 1.33 days are selected to calculate the order of the degree of closeness, which can not only retain the main components of the tide but also synthesize the tidal wave distortion Analysis, highlighting short-term changes. (3) The calculation results of geosynclinal values in Xinjiang show that before some moderate earthquakes, the order of the approaching degrees of tilted solid tidal descended at some stations.