基于泰勒多项式及曲面样条函数的地电场变化分析

选取江苏及邻区地电台网13个台站地电场观测分钟值,采用泰勒多项式和曲面样条函数模型建立地电日变化模型,使用模型曲线描述不同年份、同农历日期、同等磁情天气的实测地电日变化,结果表明:使用分钟值曲线建立的地电日变化模型,更能清晰反映日变化特点,并可反映一天当中台站观测环境、测量系统等变化引起的地电变化;使用同一区域地电台网中若干台站同方向测道的样本曲线,建立各测道电场变化模型,可反映其自身特征及共性特征。

Daily variation of the geo-electricfield based on the Taylor polynomial and surface spline function

The planar and time-varying models of the daily variation of the geo-electric field are built up based on the Taylor polynomial and surface spline function methods with minute values of geo-electric field observed at 13 stations in Jiangsu and its adjacent area. The model curves are used to describe the measured daily variation on the same lunar date in different years with the similar geomagnetic index K_p. The results show that:The model curves based on minute values of geo-electric field can more clearly give the daily variation features of geo-electric field and the geo-electric field changes caused by observation environment and measuring system at stations in a certain day; The models of the daily variation of the geo-electric field of each channel based on the sample curves of several stations in the same direction and regional network can reflect its own characteristics and common characteristics.