Electron radiation belt data assimilation with an ensemble Kalman filter relying on the Salammbô code
Autor: | Vincent Maget, S. Bourdarie |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
Atmospheric Science
Meteorology Spacetime Computer science lcsh:QC801-809 Geology Astronomy and Astrophysics Physics based lcsh:QC1-999 symbols.namesake lcsh:Geophysics. Cosmic physics Data assimilation Space and Planetary Science Van Allen radiation belt Electron radiation Convergence (routing) Earth and Planetary Sciences (miscellaneous) Code (cryptography) symbols Ensemble Kalman filter lcsh:Q lcsh:Science lcsh:Physics |
Zdroj: | Annales Geophysicae, Vol 30, Pp 929-943 (2012) |
ISSN: | 1432-0576 |
Popis: | 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. |
Databáze: | OpenAIRE |
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