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An empirical model of electron and ion fluxes derived from observations at geosynchronous orbit
Journal article   Open access   Peer reviewed

An empirical model of electron and ion fluxes derived from observations at geosynchronous orbit

M. H. Denton, M. F. Thomsen, V. K. Jordanova, M. G. Henderson, J. E. Borovsky, J. S. Denton, D. Pitchford and D. P. Hartley
Space weather, Vol.13(4), pp.233-249
04/01/2015
DOI: 10.1002/2015SW001168
url
https://doi.org/10.1002/2015SW001168View
Published (Version of record) Open Access

Abstract

Knowledge of the plasma fluxes at geosynchronous orbit is important to both scientific and operational investigations. We present a new empirical model of the ion flux and the electron flux at geosynchronous orbit (GEO) in the energy range similar to 1 eV to similar to 40 keV. The model is based on a total of 82 satellite years of observations from the magnetospheric plasma analyzer instruments on Los Alamos National Laboratory satellites at GEO. These data are assigned to a fixed grid of 24 local times and 40 energies, at all possible values of Kp. Bilinear interpolation is used between grid points to provide the ion flux and the electron flux values at any energy and local time, and for given values of geomagnetic activity (proxied by the 3h Kp index), and also for given values of solar activity (proxied by the daily F-10.7 index). Initial comparison of the electron flux from the model with data from a Compact Environmental Anomaly Sensor II, also located at geosynchronous orbit, indicates a good match during both quiet and disturbed periods. The model is available for distribution as a FORTRAN code that can be modified to suit user requirements.
 Physical Sciences Astronomy & Astrophysics Geochemistry & Geophysics Meteorology & Atmospheric Sciences Science & Technology

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