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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.
|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.|
|Rights:||This paper was published as Annales Geophysicae, 2009, 27 (9), pp. 3591-3599. It is also available from http://www.ann-geophys.net/27/3591/2009/angeo-27-3591-2009.html. Doi: 10.5194/angeo-27-3591-2009|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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