An improved empirical model of electron and ion fluxes at geosynchronous orbit based on upstream solar wind conditions

M. H. Denton; M. G. Henderson; V. K. Jordanova; M. F. Thomsen; J. E. Borovsky; J. Woodroffe; D. P. Hartley; D. Pitchford

doi:10.1002/2016SW001409

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An improved empirical model of electron and ion fluxes at geosynchronous orbit based on upstream solar wind conditions

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An improved empirical model of electron and ion fluxes at geosynchronous orbit based on upstream solar wind conditions

M. H. Denton, M. G. Henderson, V. K. Jordanova, M. F. Thomsen, J. E. Borovsky, J. Woodroffe, D. P. Hartley and D. Pitchford

Space weather, Vol.14(7), pp.511-523

07/01/2016

DOI: 10.1002/2016SW001409

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https://www.osti.gov/biblio/1304819View

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Abstract

A new empirical model of the electron fluxes and ion fluxes at geosynchronous orbit (GEO) is introduced, based on observations by Los Alamos National Laboratory (LANL) satellites. The model provides flux predictions in the energy range similar to 1eV to similar to 40keV, as a function of local time, energy, and the strength of the solar wind electric field (the negative product of the solar wind speed and the z component of the magnetic field). Given appropriate upstream solar wind measurements, the model provides a forecast of the fluxes at GEO with a similar to 1h lead time. Model predictions are tested against in-sample observations from LANL satellites and also against out-of-sample observations from the Compact Environmental Anomaly Sensor II detector on the AMC-12 satellite. The model does not reproduce all structure seen in the observations. However, for the intervals studied here (quiet and storm times) the normalized root-mean-square deviation < similar to 0.3. It is intended that the model will improve forecasting of the spacecraft environment at GEO and also provide improved boundary/input conditions for physical models of the magnetosphere.

Physical Sciences

Astronomy & Astrophysics

Geochemistry & Geophysics

Meteorology & Atmospheric Sciences

Science & Technology

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Title: Subtitle: An improved empirical model of electron and ion fluxes at geosynchronous orbit based on upstream solar wind conditions
Creators: M. H. Denton - Space Science Institute
M. G. Henderson - Los Alamos National Laboratory
V. K. Jordanova - Los Alamos National Laboratory
M. F. Thomsen - Planetary Science Institute
J. E. Borovsky - Space Science Institute
J. Woodroffe - Los Alamos National Laboratory
D. P. Hartley - University of Iowa
D. Pitchford - SES (Luxembourg)
Resource Type: Journal article
Publication Details: Space weather, Vol.14(7), pp.511-523
DOI: 10.1002/2016SW001409
ISSN: 1542-7390
eISSN: 1542-7390
Publisher: Amer Geophysical Union
Number of pages: 13
Grant note: DE-AC52-06NA25396 / Space Hazards Induced near Earth by Large, Dynamic Storms (SHIELDS) project - U.S. Department of Energy through the LANL/LDRD Program NNX14AN90G; NNX16AB75G / Space Science Institute by the NASA Heliophysics LWS program NNX14AC15G / NASA Heliophysics GI program 1502947 / NSF GEM program; National Science Foundation (NSF); NSF - Directorate for Engineering (ENG)
Language: English
Date published: 07/01/2016
Academic Unit: Physics and Astronomy
Record Identifier: 9984548669802771

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