关于基线值拟合问题的讨论

基线值是沟通相对记录与绝对观测的桥梁,是相对记录仪器的工作状态与绝对观测值的准确程度的综合反应,它在地磁台站工作中具有举足轻重的地位和作用。如何准确地、定量地评定基线值的质量,是一个对台站工作有指导意义的重要问题。本文指出多元线性回归方法用于基线值拟合和质量评定的物理机制清楚,计算结果有明确的物理意义。对多项式拟合方法及基线值的温度系数和误差统计的某些观点也进行了讨论。

The discussion about curve fit of base-line values

The base-line value is a bridge across the relative record and the absolute observation ina geomagnetic observatory.It is a synthetical result of operation state of relative recording in-strument and accurracy of absolute observation values.The base-line values are decisive for ageomagnetic observatory.It is a very important thing for a observatory how to evaluate the quality of base-linevalues accurately and quantitatively.The paper pointed out that the physical meaning to fitthe base-line values and to evaluate the quality with multiple linear regression is clear,and cal-culation result has definite physical significance.It discusses the application of polynomial ap-proximation for base-line values.Some ideas about statistic method of temperature coefficientand observation error are discussed too.