Space Science Reviews

, Volume 152, Issue 1–4, pp 135–157 | Cite as

Separation of the Magnetic Field into External and Internal Parts

  • N. Olsen
  • K.-H. Glassmeier
  • X. Jia


The magnetic field of a planet or a planetary moon contains contributions from a variety of sources in the environment of the body (external sources) and its interior (internal sources). This chapter describes different methods that have been developed for the separation of external and internal source contributions, and their application to selected planets and one of Jupiter’s moons, Ganymede.


Spherical harmonic analysis External current systems Magnetospheric currents Earth Mars Mercury Ganymede 


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Copyright information

© The Author(s) 2009

Authors and Affiliations

  1. 1.DTU Space and Niels Bohr Institute of Copenhagen UniversityCopenhagen ØDenmark
  2. 2.Institut für Geophysik und extraterrestrische PhysikTU BraunschweigBraunschweigGermany
  3. 3.Max-Planck-Institut für SonnensystemforschungKatlenburg-LindauGermany
  4. 4.Department of Earth and Space Sciences and Institute of Geophysics and Planetary PhysicsUniversity of California, Los AngelesLos AngelesUSA

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