Objectives : fundamentals in geomagnetism : measurement, analysis and modeling of the internal geomagnetic field, secular variation, description of external fields (ionospheric, magnetospheric).
Course content :
Part I : Introduction
- various uses of geomagnetism: scientific studies and industrial applications.
- presentation of the magnetic field variations and their sources.
- definition of field elements and associated remarkable geographical locations.
- the main sources of data: observatories, repeat stations, aeromagnetic and oceanographic surveys, satellites.
Part II : Fields of internal origin
- main field : description, modeling at the Earth's and Core'surface, temporal variations, dynamo process
- crustal Field : description, modeling at global and regional scale, characteristics
Part III : Fields of external origin
- ionospheric Field
- magnetospheric Field
Content of TD / TP :
- visit the Museum of geomagnetism
- analysis of declination charts
- study of spherical harmonics; liaison with the field of a multipole
- spherical harmonic analysis, modelling with the help of various models : IGRF field, dipolar field, non-dipole field, changes over time
- spectrum spatial field
- study of the solar regular variation
- morphological analysis of magnetograms