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AGU: Journal of Geophysical Research, Space Physics

 

Index Terms

  • Magnetospheric Physics: MHD waves and instabilities
  • Ionosphere: Active experiments
  • Magnetospheric Physics: Auroral phenomena
  • Electromagnetics: Instrumentation and techniques
  • Ionosphere: Particle acceleration
Abstract
Cited By (4)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, 1090, 14 PP., 2003
doi:10.1029/2002JA009483

Detection of artificially generated ULF waves by the FAST spacecraft and its application to the “tagging” of narrow flux tubes

D. M. Wright

Department of Physics and Astronomy, University of Leicester, Leicester, UK

J. A. Davies

Department of Physics and Astronomy, University of Leicester, Leicester, UK

T. K. Yeoman

Department of Physics and Astronomy, University of Leicester, Leicester, UK

T. R Robinson

Department of Physics and Astronomy, University of Leicester, Leicester, UK

S. R. Cash

Department of Physics and Astronomy, University of Leicester, Leicester, UK

E. Kolesnikova

Department of Physics and Astronomy, University of Leicester, Leicester, UK

M. Lester

Department of Physics and Astronomy, University of Leicester, Leicester, UK

P. J. Chapman

Department of Physics and Astronomy, University of Leicester, Leicester, UK

R. J. Strangeway

University of California, Los Angeles, California, USA

R. B. Horne

British Antarctic Survey, Cambridge, UK

M. T. Rietveld

EISCAT, Ramfjordmoen, Norway

Max-Planck-Institut für Aeronomie, Katlenburg-Lindau, Germany

C. W. Carlson

University of California, Berkeley, California, USA

Recently, Robinson et al. [2000] presented a brief report on the artificial generation of ULF waves by high power ionospheric modification and their subsequent detection by the Fast Auroral Snapshot (FAST) spacecraft. The radio frequency “heating” facility at Tromsø was employed to impose a 3-Hz modulation on the current system that constitutes the auroral electrojet, resulting in the injection of field-guided ULF waves into the magnetosphere. The electric and magnetic field signatures of the waves were detected directly by the FAST spacecraft. Furthermore, a signature in the downgoing field-aligned electron flux, also observed by the satellite, was postulated to have resulted from the interaction of the ULF waves with the upper boundary of the ionospheric Alfvén resonator. This paper evaluates these results in the context of the prevailing ionospheric conditions during the experiment and discusses the significance of the substorm activity, which occurred during this interval. The technique of artificial ULF wave injection, which can be used to “tag” narrow flux tubes, could play an important part in overcoming mapping issues between ground-based and space-based observations of phenomena that couple the ionosphere and magnetosphere.

Published 26 February 2003.

Citation: Wright, D. M., et al. (2003), Detection of artificially generated ULF waves by the FAST spacecraft and its application to the “tagging” of narrow flux tubes, J. Geophys. Res., 108(A2), 1090, doi:10.1029/2002JA009483.

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