Ground based magnetometry instrumentration infrastructure and data

Denmark has a long tradition in measuring the magnetic field from ground. We provide high quality geomagnetic instrumentation and data from over 20 magnetometer stations in Greenland, Faroe Islands, and Denmark.


The 3-axis Fluxgate Magnetometer Model FGE is a high-end stable variometer for geomagnetic observatories and variometer stations. This well known 3-axis variometer, assembled and calibrated by DTU Space, has a proven track-record at many observatories worldwide. It is easy to set up and operate and has demonstrated baseline stability over decades.

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D&I Magnetometer Model G is a single axis fluxgate magnetometer for mounting on theodolite for measurement of Declination and Inclination of the geomagnetic field.

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DTU Space is monitoring the Earths magnetic field with a network of ground stations in Greenland, Faroe Islands and Denmark. An array with 17 stations at coastal locations and one on the Ice Cap is operated in Greenland, one station in Faroe Islands and 4 in Denmark. All stations provide full vector geomagnetic field information with 1 Hz resolution. THL, GDH, NAQ and BFE are geomagnetic observatories, and thus provide accurate data

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The ground based stations continuously deliver magnetometer data in near real time. The data archive goes back over 100 years in Denmark, since 1926 in Greenland and since 2016 in the Faroe Islands.

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Geomagnetic indices

DTU Space contributes with observatory data to 3 of 6 IAGA endorsed geomagnetic indices:

In the sub-auroral region, we contribute with data from the Brorfelde observatory to the Kp index.

In the auroral region, we contribute with data from the Narsarsuaq observatory to the AE index.

In the polar cap region, we contribute with data from the Qaanaaq observatory to the PC index.


Ongoing projects include:



Funding: ESA
The MAG-SWE-DAN project is a combined  activity  between  DTU Space  and the Geological Survey of Sweden to  augment  the  existing  Scandinavian and  Greenland magnetometer  network. A total number of 10 new magnetometer stations and four upgrades on existing stations from recording 1-minute data to 1-second data defines the MAG-SWE-DAN project.



Funding: Uddannelses- og Forskningsministeriet
The purpose of the Greenland Integrated Observing System (GIOS) is to resolve and understand the mechanisms behind climate, environmental and near Earth space changes in Greenland.

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