Details

Autor(en) / Beteiligte

• Ayala Solares, Jose Roberto
• Wei, Hua‐Liang
• Boynton, R. J.
• Walker, Simon N.
• Billings, Stephen A.

Titel

Modeling and prediction of global magnetic disturbance in near‐Earth space: A case study for Kp index using NARX models

Ist Teil von

• Space Weather, 2016-10, Vol.14 (10), p.899-916

Ort / Verlag

Washington: John Wiley & Sons, Inc

Erscheinungsjahr

2016

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Severe geomagnetic disturbances can be hazardous for modern technological systems. The reliable forecast of parameters related to the state of the magnetosphere can facilitate the mitigation of adverse effects of space weather. This study is devoted to the modeling and forecasting of the evolution of the Kp index related to global geomagnetic disturbances. Throughout this work the Nonlinear Autoregressive with Exogenous inputs (NARX) methodology is applied. Two approaches are presented: (i) a recursive sliding window approach and (ii) a direct approach. These two approaches are studied separately and are then compared to evaluate their performances. It is shown that the direct approach outperforms the recursive approach, but both tend to produce predictions slightly biased from the true values for low and high disturbances. Key Points Presenting parametric nonlinear models built from Kp data, along with data for a few solar wind parameters and magnetic field indices Revealing the dependent relation of the Kp index on solar wind parameters and magnetic field indices The proposed models can generate robust and excellent forecasting results