论文标题
城市有独特的磁脉冲吗？
Do cities have a unique magnetic pulse?
论文作者
论文摘要
我们对两个美国城市之间的城市磁场进行了比较分析：加利福尼亚州伯克利（加利福尼亚）和纽约市的布鲁克林自治市镇（纽约）。我们的分析使用在四个星期内获取的数据，在此期间，使用70 pt/$ \ sqrt {\ mathrm {hz}} $ sentitivity的磁场数据连续记录磁场数据。我们确定了磁特征的显着差异。特别是，我们注意到伯克利在夜间达到接近零的磁场活动，而布鲁克林的磁性活动在夜间继续进行。我们还提出了使用磁化矢量磁力计（VMR）获得的辅助测量结果，其灵敏度为300 pt/$ \ sqrt {\ mathRM {hz}} $，并证明交叉相关和频率分析分析，与数据相结合可以用来提取乌尔班元素元素的效果，并将其结合使用。最后，我们讨论了使用磁力计网络来表征城市全局磁场的潜力，并为将来的发展提供了方向。
We present a comparative analysis of urban magnetic fields between two American cities: Berkeley (California) and Brooklyn Borough of New York City (New York). Our analysis uses data taken over a four-week period during which magnetic field data were continuously recorded using a fluxgate magnetometer of 70 pT/$\sqrt{\mathrm{Hz}}$ sensitivity. We identified significant differences in the magnetic signatures. In particular, we noticed that Berkeley reaches a near-zero magnetic field activity at night whereas magnetic activity in Brooklyn continues during nighttime. We also present auxiliary measurements acquired using magnetoresistive vector magnetometers (VMR), with sensitivity of 300 pT/$\sqrt{\mathrm{Hz}}$, and demonstrate how cross-correlation, and frequency-domain analysis, combined with data filtering can be used to extract urban magnetometry signals and study local anthropogenic activities. Finally, we discuss the potential of using magnetometer networks to characterize the global magnetic field of cities and give directions for future development.
