Articles | Volume 6, issue 2
https://doi.org/10.5194/gi-6-487-2017
https://doi.org/10.5194/gi-6-487-2017
Research article
 | 
09 Nov 2017
Research article |  | 09 Nov 2017

Merging fluxgate and induction coil data to produce low-noise geomagnetic observatory data meeting the INTERMAGNET definitive 1 s data standard

Heinz-Peter Brunke, Rudolf Widmer-Schnidrig, and Monika Korte

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Short summary
In magnetic observatory data, according to the INTERMAGNET definitive 1 s data standard, the fluxgate magnetometer self noise usually covers the natural signal for frequencies higher than about 30 mHz. We present a numerical method how to merge the data with induction coil data in order to drastically reduce noise and to fill the entire possible bandwidth with information on the earth magnetic field. In spectrograms we visualize interesting phenomena revealed with the method.