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首都圈数字电磁波变化特征
The Study of Electromagnetic Data at Metropolitan Area
- DOI:
- 作者:
- 张国苓 乔子云1 贾立峰1 张建国2 王艳荣3
ZHANG Gou-ling1 QIAO Zi-yun1 JIA Li-feng1 ZHANG Jian-guo 2 WANG Yan-rong3
- 作者单位:
- 1）中国河北050021河北省地震局 2）中国河北056006河北省地震局邯郸中心台 3）中国河北066600河北省地震局昌黎地电台
1) (Seismological Bureau of Hebei Province，Shijiazhuang 050021，China)2) (Handan Seismic Station，Hebei Province，056006，China)3) (Changli Seismic Station，Hebei Province，066600，China)
- 关键词:
- 数字电磁波；最大熵谱；日变；干扰
electromagnetic data, maximum entropy method, diurnal variation, disturbance sources.
- 摘要:
- 选取首都圈地区红山、昌黎、怀来、昌平流村、密云牛栏山等11个台的数字电磁波资料，利用最大熵谱法对其分钟值和时值资料进行谱成分分析，发现数字电磁波日变化12h半日波和24h全日波的成分较强。通过环境调研和对比分析，总结数字电磁波的常见干扰源为地电阻率干扰和地铁干扰等，干扰形态分别为地电阻率供电时段5分钟左右的远超数字电磁波本底的扰动和地铁运行时段的正脉冲变化。
The spectrum characteristics of electromagnetic diurnal variation have been identified by maximum entropy method，based on electromagnetic data from eleven stations at Chinese metropolitan area，including Hongshan，Changli and Huailai．This study shows that， the amplitude of the 12h and 24-25h semidiurnal wave is larger than others. The disturbance sources of electromagnetic date include geo-resistivity power supply and Subway interference. The interference pattern caused by supplying periods of earth resistivity is electromagnetic disturbance far more than the background about 5minutes, and that caused by subway is positive pulse change at the running time.
