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Prediction of a geosynchronous electron environment with in situ magnetic field measurements

Earth, Planets and Space volume 51, pages 219–223 (1999)Cite this article

Abstract

A new approach to predict the relativistic electron flux at geosynchronous orbit has been developed. Our prediction technique is based on a linear prediction filter with the input consisting of magnetic field variations at geosynchronous orbit for 6 consecutive days. The output is a prediction, made one day ahead, of the average daily flux of >2 MeV electrons. This technique was developed with data from GOES 7 for the period from January 1994 through April 1994. The technique’s performance was tested by comparing the output results with the fluxes observed for the period from May 1994 through May 1995. The results showed that the empirical technique using in situ magnetic field measurements provides reasonably accurate forecasts of the geosynchronous electron environment one day in advance.

References

  • Baker, D. N., J. B. Blake, R. W. Klebesadel, and P. R. Higbie, Highly relativistic electrons in the Earth’s outer magnetosphere, 1. Lifetimes and temporal history 1979–1984, J. Geophys. Res., 91, 4265–4276, 1986.

    Article  Google Scholar 

  • Baker, D. N., R. L. McPherron, T. E. Cayton, and R. W. Klebesadel, Linear prediction filter analysis of relativistic electron properties at 6.6 RE, J. Geophys. Res., 95, 15133–15140, 1990.

    Article  Google Scholar 

  • Hastings, D. and H. Garrett, Spacecraft-Environment Interactions, 292 pp., Cambridge University Press, New York, 1996.

    Book  Google Scholar 

  • Kokubun, S. and R. L. McPherron, Substorm signatures at synchronous altitude, J. Geophys. Res., 86, 11265–11277, 1981.

    Article  Google Scholar 

  • Koons, H. C. and D. J. Gorney, A neural network model of the relativistic electron flux at geosynchronous orbit, J. Geophys. Res., 96, 5549–5556, 1991.

    Article  Google Scholar 

  • Li, X., D. N. Baker, M. Temerin, D. Larson, R. P. Lin, G. D. Leeves, M. Looper, S. G. Kanekal, and R. A. Mewaldt, Are energetic electrons in the solar wind the source of the outer radiation belt?, Geophys. Res. Lett., 24, 923–926, 1997.

    Article  Google Scholar 

  • Nagai, T., Local time dependence of electron flux changes during substorms derived from multi-satellite observations at synchronous orbit, J. Geophys. Res., 87, 3456–3468, 1982a.

    Article  Google Scholar 

  • Nagai, T., Observed magnetic substorm signatures at synchronous altitude, J. Geophys. Res., 87, 4405–4417, 1982b.

    Article  Google Scholar 

  • Nagai, T., “Space weather forecast”: Prediction of relativistic electron intensity at synchronous orbit, Geophys. Res. Lett., 15, 425–428, 1988.

    Article  Google Scholar 

  • Nagai, T., An empirical model of substorm-related magnetic field variations at synchronous orbit, in Magnetospheric Substorms, edited by J. R. Kan, T. A. Potemra, S. Kokubun, and T. Iijima, pp. 91–95, AGU, Washington, D.C., 1991.

    Chapter  Google Scholar 

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Authors and Affiliations

  1. Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo, 152-8551, Japan

    A. Tsutai, C. Mitsui & T. Nagai

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  1. A. Tsutai
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  2. C. Mitsui
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  3. T. Nagai
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Tsutai, A., Mitsui, C. & Nagai, T. Prediction of a geosynchronous electron environment with in situ magnetic field measurements. Earth Planet Sp 51, 219–223 (1999). https://doi.org/10.1186/BF03352225

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  • DOI: https://doi.org/10.1186/BF03352225

Keywords

  • Relativistic Electron
  • Geomagnetic Activity
  • Linear Prediction
  • Impulse Response Function
  • Prediction Skill