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

Wright, D.M.; Davies, J.A.; Yeoman, T.K.; Robinson, T.R.; Cash, S.R.; Kolesnikova, E.; Lester, M.; Chapman, P.J.; Strangeway, R.J.; Horne, R.B. ORCID:; Rietveld, M.T.; Carlson, C.W.. 2003 Detection of artificially generated ULF waves by the FAST spacecraft and its application to the 'tagging' of narrow flux tubes. Journal of Geophysical Research, 108 (A2), 1090. 14, pp.

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[1] 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 Tromso 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 Alfven 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.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Magnetic Reconnection, Substorms and their Consequences
ISSN: 0148-0227
Additional Keywords: high power RF heating, ULF waves, FAST spacecraft, ionospheric Alfven resonator
NORA Subject Terms: Physics
Atmospheric Sciences
Date made live: 16 Feb 2012 12:04 +0 (UTC)

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