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[1] A variety of observations have shown strong seasonal variations in a vast array of magnetosphere-ionosphere parameters, including field-aligned currents, cross polar cap potential, and precipitating electron energy flux. In this paper we examine how these variations are modeled in the Lyon-Fedder-Mobarry (LFM) global-scale magnetohydrodynamic simulation… (More)

[1] Prior studies have examined the time-stationary (and quasi-stationary) dynamic response of relativistic electrons in the Earth's outer radiation belt to changes in solar wind bulk speed using linear prediction filters [Baker et al., 1990; Vassiliadis et al., 2002]. For this study, we have implemented an adaptive system identification scheme, based on… (More)

- M. Wiltberger, R. S. Weigel, M. Gehmeyr
- 2005

[1] Among the many challenges facing space physics today is the need for an analysis and visualization package which can examine the results from numerical and empirical models as well as observational data. In this paper we introduce the CISM-DX package as a possible answer to this problem. We have created a tool which is capable of completing highly… (More)

The results of a genetic algorithm optimization of the WINDMI model using the Blanchard-McPherron sub-storm data set is presented. A key result from the large-scale computations used to search for convergence in the predictions over the database is the finding that there are three distinct types of v x B s-AL waveforms characterizing substorms. Type I and… (More)

a r t i c l e i n f o a b s t r a c t Numerical schemes for ideal magnetohydrodynamics (MHD) that are based on the standard finite volume method (FVM) exhibit pseudo-convergence in which irregular structures no longer exist only after heavy grid refinement. We describe a method for obtaining solutions for coplanar and near-coplanar cases that consist of… (More)

- R S Weigel, W Horton, T Tajima, T Detman
- 2007

Neural networks are developed as a predictive lter for geomagnetic activity. The networks use as inputs a vector containing time delayed copies of the time series for the geomagnetic activity level (AL) and the product of the interplanetary solar wind velocity and rectiied southern component of the interplanetary magnetic eld (VB s). Several new methods… (More)

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