Instruments
The Geophysical Centre of the Royal Meteorological Institute (RMI) was established in the 1940s in Dourbes (50.1°N, 4.6°E), a remote location in the south of Belgium, providing a suitable environment for accurate observations of the ionosphere, geomagnetic field, and cosmic ray activity. All instruments, used as a finely-tuned observatory, yield high-resolution concurrent and collocated measurements of key characteristics of the space weather and its effects.