蒙城台地电场资料分析

Analysis of data of geoelectric field at Meng- cheng station in Anhui Province

通过对安徽省蒙城台2002年地电场分钟值数据的处理分析, 结果认为该台可以清晰地记录到大地电场的正常日变化、电磁暴; 同一方向长短极距的变化基本同步; NS向、EW向与NW向的比测误差基本正常; 拟合极化方向角在静日和有电磁暴时, 在N80°W^N100°W内摆动, 较稳定, 有干扰和雷电时极化方向明显偏转; 大地电场矢量方向角α变化大。受降雨、外线接触不良、仪器工作状况不佳的影响, 少数数据质量不好, 通过改进, 还可以进一步提高观测质量。

Minute value data of geoelectric field at Mengcheng Station in Anhui Province in 2002 have been analyzed and processed. The results indicate that clear normal daily variation and electromagnetic storm have been recorded; variations of data in long and short polar distances of same orientation are consistent; comparing NW component with vector sum of SN and WE in NW orientation, the errors are small. The linear polarization direction angles in magnetostatic and electromagnetic storm days are stable; the change is from N80°W to N100°W. They deflect obviously when there are interfere and thunderstorm. The orientation angles of telluric field change largely in all days. As results of rainfall, line breakdown and instrumental instability, a few data are anomalous. The observation quality will be higher if the condition is improved.