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综合分析了中国武汉、比利时布鲁塞尔和法国斯特拉斯堡 3台超导重力仪近 2 7a的长周期序列观测数据 ,获得了不同台站观测资料的质量因素 ,精密测定了地球潮汐常数 .文章对用不同引潮位展开、考虑加权滤波、做气压改正、删除错误数据以及规定数据段均方差上限等问题进行了讨论 .利用全球海潮模型对分析结果进行了负荷改正 ,研究了观测残差和气压变化间的相关性 ,在时间和频率域内测定了大气重力导纳值 ,并研究了导致与标准地球潮汐模型间差异的可能原因 .
The long-period observation data of 3 superconducting gravimeters from Wuhan, Belgium, Brussels, Belgium and Strasbourg, France, were collected and analyzed. The quality factors of different stations were obtained and the tidal constants of the earth were accurately measured. The problems such as different tide levels expansion, considering weighted filtering, barometric correction, deletion of erroneous data and upper limit of variance of specified data segments are discussed. The global tide model is used to correct the load and the observed residuals and barometric pressure The correlation between the changes, the atmospheric gravity admittance values in the time and frequency domains were determined and the possible causes for the differences from the standard Earth tide models were studied.