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Observations of Ion Cyclotron Waves Near Synchronous Orbit and on the Ground

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Space Plasma Simulations

Abstract

Ion cyclotron waves (hereafter ICW’s) generated in the magnetosphere by the ion cyclotron instability of 10–100 keV protons are now known to be the origin of short-period (0.1–5 Hz) electromagnetic field oscillations observed by synchronous spacecraft and on the earth’s surface. Observations of the various wave characteristics, including spectral and polarization properties that lead to the identification of generation and propagation mechanisms and regions in the magnetosphere are described with reference to ATS-6, GEOS and ground-based wave data and interpreted using cold plasma propagation theory. The presence of heavy ions (O+, He+) dramatically modifies ICW magnetospheric propagation characteristics giving rise to spectral slots and polarization reversals. These properties may be used in plasma diagnostics. Finally satellite-ground correlations and techniques for determining the magnetospheric source position of ICW’s not seen at synchronous orbit but observed on the ground as structured Pc1 pulsations are considered.

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© 1985 D. Reidel Publishing Company

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Fraser, B.J. (1985). Observations of Ion Cyclotron Waves Near Synchronous Orbit and on the Ground. In: Ashour-Abdalla, M., Dutton, D.A. (eds) Space Plasma Simulations. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5454-0_22

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  • DOI: https://doi.org/10.1007/978-94-009-5454-0_22

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-8909-8

  • Online ISBN: 978-94-009-5454-0

  • eBook Packages: Springer Book Archive

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