International Geomagnetic Reference Field

Source: https://en.wikipedia.org/wiki/International_Geomagnetic_Reference_Field

The term usually present in the associated Legendre functions is omitted in this formulation and is instead accounted for in the Gauss coefficients.
The Gauss coefficients are modelled as a piecewise-linear function of time with a 5-year step size.[2]

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Geomagnetic latitude
Magsat
Ørsted (satellite)
CHAMP (satellite)
Swarm (satellites)

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^ Jump up to: a b c Thébault, Erwan; Finlay, Christopher C; Beggan, Ciarán D; Alken, Patrick; Aubert, Julien; Barrois, Olivier; Bertrand, Francois; Bondar, Tatiana; Boness, Axel; Brocco, Laura; Canet, Elisabeth; Chambodut, Aude; Chulliat, Arnaud; Coïsson, Pierdavide; Civet, François; Du, Aimin; Fournier, Alexandre; Fratter, Isabelle; Gillet, Nicolas; Hamilton, Brian; Hamoudi, Mohamed; Hulot, Gauthier; Jager, Thomas; Korte, Monika; Kuang, Weijia; Lalanne, Xavier; Langlais, Benoit; Léger, Jean-Michel; Lesur, Vincent; Lowes, Frank J; Macmillan, Susan; Mandea, Mioara; Manoj, Chandrasekharan; Maus, Stefan; Olsen, Nils; Petrov, Valeriy; Ridley, Victoria; Rother, Martin; Sabaka, Terence J; Saturnino, Diana; Schachtschneider, Reyko; Sirol, Olivier; Tangborn, Andrew; Thomson, Alan; Tøffner-Clausen, Lars; Vigneron, Pierre; Wardinski, Ingo; Zvereva, Tatiana (27 May 2015). "International Geomagnetic Reference Field: the 12th generation" (PDF). Earth, Planets and Space. 67 (79). Bibcode:2015EP&S...67...79T. doi:10.1186/s40623-015-0228-9.

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^ Jump up to: a b Lowes, F.J. (January 2010). "The International Geomagnetic Reference Field: A "Health" Warning". IAGA working group V-MOD: Geomagnetic Field Modeling. Archived from the original on 2018-06-30.

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IGRF Model Description by IAGA
IGRF Health Warning, Errors, and Limitations

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