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Massive multi-missions statistical study and analytical modeling of the Earth magnetopause: 3- An asymmetric non indented magnetopause analytical model
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  • Gautier Nguyen,
  • Nicolas Aunai,
  • Bayane Michotte de Welle,
  • Alexis Jeandet,
  • Benoit Lavraud,
  • Dominique Fontaine
Gautier Nguyen
Direction Générale de l'Armement

Corresponding Author:[email protected]

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Nicolas Aunai
IRAP, Toulouse, France
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Bayane Michotte de Welle
Ecole polytechnique
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Alexis Jeandet
Ecole polytechnique
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Benoit Lavraud
Institut de Recherche en Astrophysique et Planetologie - CNRS
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Dominique Fontaine
Laboratoire de Physique des Plasmas (LPP/CNRS), Paris, France
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Abstract

In a companion statistical study, we showed that the expression of the magnetopause surface as a power law of an elliptic function of the zenith angle θ holds at lunar distances, that the flaring of the magnetopause surface is influenced by the Interplanetary Magnetic Field (IMF) By component and that the IMF Bx component had no influence on the stand-off distance. As a follow-up to these statistical results, this paper presents a new empirical analytical asymmetric and non-indented model of the magnetopause location and shape. This model is obtained from fitting of 15 349 magnetopause crossings using 17 different spacecraft and is parametrized by the upstream solar wind dynamic and magnetic pressures, the IMF clock angle and the Earth dipole tilt angle. The constructed model provides a more accurate prediction of the magnetopause surface location than current Magnetopause surface models, especially on the night side of the magnetosphere.