Electron radiation belt data assimilation with an ensemble Kalman filter relying on the Salammbôcode

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Abstract

<p><strong>Abstract.</strong> In this study we implement a data assimilation tool using a 3-D radiation belt model and an ensemble Kalman filter approach. High time and space reanalysis of the electron radiation belt fluxes is obtained over the time period 5 October to 25 October 1990 by combining sparse observations with the Salammbô 3-D model in an optimal way. The convergence of the ensemble Kalman filter is analyzed carefully. The risk of using a biased physical model is discussed and relative consequences are highlighted. Finally, a validation against CRRES data and major improvements compared to pure physics based model are presented.</p>

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Bourdarie, S. A., & Maget, V. F. (2012). Electron radiation belt data assimilation with an ensemble Kalman filter relying on the Salammbôcode. Annales Geophysicae, 30(6), 929–943. https://doi.org/10.5194/angeo-30-929-2012

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