Magnetic valley is a project aiming at the development of operational products and services, based on the expertise of the RMI Geophysical Centre, in order to contribute to the socio-economic revival. For more than 50 years, the fields of expertise in which the Geophysical Centre is a world reference are: the Earth's magnetic field, the ionosphere and the environmental magnetism.
Autodif makes it possible to automate completely the absolute measurements of the geomagnetic field declination and inclination. Automation without disturbing observations has been a real challenge to overcome since many key elements like sensors, motors or electronics generally contain ferromagnetic elements and conduct electrical currents.
We are offering currently measurements of
- magnetic properties (e.g. susceptibility, remanent magnetisation, hysteresis)
- non-magnetic properties (e.g. volume, density, porosity, dry matter)
Archaeomagnetic dating is based on our current knowledge of the secular variation of the geomagnetic field in the past and on the property of baked and burned materials such as baked clays, carried at high temperatures, to acquire during their cooling a stable remanent magnetisation called thermoremanent magnetisation. For isotropic and homogeneous materials, the direction of this magnetisation is parallel to the ambient geomagnetic field and its intensity is proportional to the field intensity.
The availability of the RMI Dourbes comprehensive ionosonde database and the immediate access to high-quality digisonde measurements allowed the RMI scientists to do valuable research and developments. For example, the RMI Ionospheric section team developed a novel operational system based on measurements from the collocated Digisonde and a GNSS receiver in Dourbes.