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arXiv 1002.1856physics.geo-phphysics.data-an
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使用调和样条对南部非洲Geomagnetic Field进行区域建模

Regional Modelling of the Southern African Geomagnetic Field using Harmonic Splines

Anne Geese, Michael Hayn, Vincent Lesur, Mioara Mandea

摘要:

在南部非洲地区,地磁场很弱,变化很快。自20世纪50年代以来,对该地区进行了一系列地磁场测量。我们利用现有的重复站调查和天文台的年度手段,并清理这些数据集,通过消除跳跃和尽量减少外部字段的贡献,在原来的时间序列。这一独特的数据集使我们能够通过计算区域模型来详细了解地磁场在空间和时间上的行为。为此,我们使用类似于调和样条的表示系统。最初,该技术是系统地测试合成数据。在系统地测试了合成数据的方法,我们得出了一个模型,1961年至2001年,给出了一个详细的视图在该地区的地磁场的快速变化。

英文摘要:

Over the southern African region the geomagnetic field is weak and changes rapidly. For this area series of geomagnetic field measurements exist since the 1950s. We take advantage of the existing repeat station surveys and observatory annual means, and clean these data sets by eliminating jumps and minimising external field contributions in the original time series. This unique data set allows us to obtain a detailed view of the geomagnetic field behaviour in space and time by computing a regional model. For this, we use a system of representation similar to harmonic splines. Initially, the technique is systematically tested on synthetic data. After systematically testing the method on synthetic data, we derive a model for 1961 to 2001 that gives a detailed view of the fast changes of the geomagnetic field in this region.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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