TGO
Tromsø Geophysical Observatory
DTU Space
Technical University of Denmark
FMI
Finnish Meteorological Institute
SGO
Sodankylä Geophysical Observatory
Geophysical Institute University of Alaska Fairbanks
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![](../IRF_logo.png)
Swedish Institute of
Space Physics
Observatory
![](../IslandLogo.jpg)
University of Iceland
Leirvogur Magnetic Observatory
AARI, Russia:
![](USGS_logo.gif) U.S. Geological Survey
![](logo_zamg.png) Conrad Observatorium
![](GFZ-Logo_eng_RGB.svg)
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