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Cluster spacecraft observations of a ULF wave enhanced by Space Plasma Exploration by Active Radar (SPEAR)

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journal contribution
posted on 13.07.2010, 14:59 by S. V. Badman, D. M. Wright, L. B. N. Clausen, R. C. Fear, T. R. Robinson, Tim K. Yeoman
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.

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Citation

Annales Geophysicae, 2009, 27 (9), pp. 3591-3599.

Published in

Annales Geophysicae

Publisher

Copernicus Publications on behalf of the European Geosciences Union (EGU)

issn

0992-7689

Copyright date

2009

Available date

13/07/2010

Publisher version

http://www.ann-geophys.net/27/3591/2009/

Language

en

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