scholarly journals Reconstructing the dynamics of the outer electron radiation belt by means of the standard and ensemble Kalman filter with the VERB-3D code

2020 ◽  
Author(s):  
Angelica Maria Castillo Tibocha ◽  
Jana de Wiljes ◽  
Yuri Y Shprits ◽  
Nikita A Aseev
Keyword(s):  
Kalman Filter ◽  
Ensemble Kalman Filter ◽  
Radiation Belt ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals Electron radiation belt data assimilation with an ensemble Kalman filter relying on the Salammbô code

2012 ◽  
Vol 30 (6) ◽  
pp. 929-943 ◽  
Author(s):  
S. A. Bourdarie ◽  
V. F. Maget
Keyword(s):  
Kalman Filter ◽  
Data Assimilation ◽  
Physical Model ◽  
Ensemble Kalman Filter ◽  
Radiation Belt ◽  
High Time ◽  
Electron Radiation ◽  
Time Period ◽  
Filter Approach ◽  
D Model

Abstract. 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.

Toward dynamic modeling of the outer electron radiation belt

1990 ◽  
Vol 95 (A8) ◽  
pp. 12069 ◽  
Author(s):  
Y. T. Chiu ◽  
M. A. Rinaldi ◽  
R. W. Nightingale
Keyword(s):  
Dynamic Modeling ◽  
Radiation Belt ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals Processes in auroral oval and outer electron radiation belt

2018 ◽  
Vol 70 (1) ◽  
Author(s):  
Elizaveta E. Antonova ◽  
Marina V. Stepanova ◽  
Pablo S. Moya ◽  
Victor A. Pinto ◽  
Vadim V. Vovchenko ◽  
...  
Keyword(s):  
Radiation Belt ◽  
Auroral Oval ◽  
Electron Radiation ◽  
Outer Electron

scholarly journals Modelling the outer radiation belt as a complex system in a self-organised critical state

2005 ◽  
Vol 12 (6) ◽  
pp. 993-1001 ◽  
Author(s):  
N. B. Crosby ◽  
N. P. Meredith ◽  
A. J. Coates ◽  
R. H. A. Iles
Keyword(s):  
Radiation Belt ◽  
Outer Part ◽  
Power Laws ◽  
Threshold Value ◽  
Electron Radiation ◽  
Outer Electron ◽  
Outer Radiation Belt ◽  
Frequency Distributions ◽  
Self Organized ◽  
Self Organized Criticality

Abstract. The dynamic behaviour of the outer electron radiation belt makes this area of geo-space a candidate for the concept of self-organized criticality. It is shown here that frequency distributions of measured outer electron radiation belt data are well-represented by power-laws over two decades. Applying the concept of self-organized criticality to interpret the shape of the distributions suggests another approach to complement existing methods in the interpretation of how this complicated environment works. Furthermore sub-grouping the radiation belt count rate data as a function of spatial location or temporal interval (e.g. L-shell, magnetic local time, solar cycle, ...) shows systematic trends in the value of the slope of the power-laws. It is shown that the inner part of the outer radiation belt is influenced in a similar manner to the outer part, but in a less profound way. Our results suggest that the entire outer radiation belt appears to be affected as the sum of its individual parts. This type of study also gives the probability of exceeding a given threshold value over a given time; limiting the size of "an event". The average values could then be compared with models used in spacecraft design.

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