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Article Dans Une Revue Earth Planets and Space Année : 2020

The Kalmag model as a candidate for IGRF-13

Julien Baerenzung
  • Fonction : Auteur
Matthias Holschneider
  • Fonction : Auteur
Johannes Wicht
Vincent Lesur
Sabrina Sanchez

Résumé

We present a new model of the geomagnetic field spanning the last 20 years and called Kalmag. Deriving from the assimilation of CHAMP and Swarm vector field measurements, it separates the different contributions to the observable field through parameterized prior covariance matrices. To make the inverse problem numerically feasible, it has been sequentialized in time through the combination of a Kalman filter and a smoothing algorithm. The model provides reliable estimates of past, present and future mean fields and associated uncertainties. The version presented here is an update of our IGRF candidates; the amount of assimilated data has been doubled and the considered time window has been extended from
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hal-02996642 , version 1 (16-11-2020)

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Paternité - Pas de modifications

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Julien Baerenzung, Matthias Holschneider, Johannes Wicht, Vincent Lesur, Sabrina Sanchez. The Kalmag model as a candidate for IGRF-13. Earth Planets and Space, 2020, 72 (1), ⟨10.1186/s40623-020-01295-y⟩. ⟨hal-02996642⟩
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