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|Title:||First results of artificial stimulation of the ionospheric Alfvén resonator at 78°N|
|Authors:||Scoffield, H. C.|
Yeoman, Tim K.
Robinson, T. R.
Baddeley, L. J.
Dhillon, R. S.
Wright, D. M.
|Publisher:||American Geophysical Union (AGU)|
|Citation:||Geophysical Research Letters, 2006, 33, L19103.|
|Abstract:||On 2 December 2005 a modulated X-mode ionospheric modification experiment was carried out using the Space Plasma Exploration by Active Radar (SPEAR) high power facility on Svalbard (78.15°N, 16.05°E), with the intention of artificially stimulating the Ionospheric Alfvén Resonator (IAR). A modulation frequency of 3 Hz was superimposed on a 20 minute on/off cycle. Local ionograms showed an E region ionosphere of sufficient plasma density for the SPEAR beam to strongly interact with the low-altitude ionospheric plasma. The Barentsburg pulsation magnetometer monitored the resulting wave activity in the 0.5–5 Hz frequency range. Clear enhancements of the spectral power at 3 Hz were observed in the D component data, when SPEAR was transmitting and there was little natural Pc1 wave activity. During part of the interval, when high power substorm-associated Pc1 waves occurred, the polarisation of the artificially-stimulated wave rotated from the D to the H component.|
|Rights:||This paper was published as Geophysical Research Letters, 2006, 33, L19103. It is also available from http://www.agu.org/pubs/crossref/2006/2006GL027384.shtml. Doi: 10.1029/2006GL027384|
|Appears in Collections:||Published Articles, Dept. of Physics and Astronomy|
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