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Title: Cluster spacecraft observations of a ULF wave enhanced by Space Plasma Exploration by Active Radar (SPEAR)
Authors: Badman, S. V.
Wright, D. M.
Clausen, L. B. N.
Fear, R. C.
Robinson, T. R.
Yeoman, Tim K.
First Published: 28-Sep-2009
Publisher: Copernicus Publications on behalf of the European Geosciences Union (EGU)
Citation: Annales Geophysicae, 2009, 27 (9), pp. 3591-3599.
Abstract: Space Plasma Exploration by Active Radar (SPEAR) is a high-latitude ionospheric heating facility capable of exciting ULF waves on local magnetic field lines. We examine an interval from 1 February 2006 when SPEAR was transmitting a 1 Hz modulation signal with a 10 min on-off cycle. Ground magnetometer data indicated that SPEAR modulated currents in the local ionosphere at 1 Hz, and enhanced a natural field line resonance with a 10 min period. During this interval the Cluster spacecraft passed over the heater site. Signatures of the SPEAR-enhanced field line resonance were present in the magnetic field data measured by the magnetometer on-board Cluster-2. These are the first joint ground- and space-based detections of field line tagging by SPEAR.
DOI Link: 10.5194/angeo-27-3591-2009
ISSN: 0992-7689
Type: Article
Rights: This paper was published as Annales Geophysicae, 2009, 27 (9), pp. 3591-3599. It is also available from Doi: 10.5194/angeo-27-3591-2009
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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