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本文以1963年秋建成的全国第一个研究地壳形变与地震的专用形变网之起始边天文方位角的十二期施测成果(1963～1980年)为例,讨论分析其周期性干扰规律,用近似数学模型进行干扰排除,对于降低噪声水平、突出前兆信息,取得了一定效果。同时,文章还提出了利用最佳复测期来原始地减弱周期性干扰影响,及早判别复测成果有无超噪声限信息的设想。
In this paper, the 12th survey results (1963-1980) of the azimuth of the astronomical azimuth at the beginning of the special deformation network for crustal deformation and earthquakes completed in the autumn of 1963 as the first study in China to discuss and analyze its periodic interference law, With the approximate mathematical model of interference exclusion, to reduce the noise level, highlight the precursor information, and achieved some results. At the same time, the article also proposed the use of the best retest period to the original weakened the impact of periodic interference, as early as possible to determine the outcome of retest the idea of whether there is no noise limit information.