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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 11
Ann. Geophys., 15, 1412–1421, 1997
https://doi.org/10.1007/s00585-997-1412-4
© European Geosciences Union 1997
Ann. Geophys., 15, 1412–1421, 1997
https://doi.org/10.1007/s00585-997-1412-4
© European Geosciences Union 1997

  30 Nov 1997

30 Nov 1997

Spatial observations by the CUTLASS coherent scatter radar of ionospheric modification by high power radio waves

G. E. Bond1, T. R. Robinson1, P. Eglitis1, D. M. Wright1, A. J. Stocker1, M. T. Rietveld2, and T. B. Jones1 G. E. Bond et al.
  • 1Department of Physics and Astronomy, Leicester University, University Road, Leicester, LE1 7RH, UK
  • 2EISCAT Scientific Association, Ramfjordmoen, N-9027 Ramfjorbotn, Norway

Abstract. Results are presented from an experimental campaign in April 1996, in which the new CUTLASS (Co-operative UK twin-located Auroral Sounding System) coherent scatter radar was employed to observe artificial field aligned irregularities (FAI) generated by the EISCAT (European Incoherent SCATter) heating facility at Tromsø, Norway. The distribution of backscatter intensity from within the heated region has been investigated both in azimuth and range with the Finland component of CUTLASS, and the first observations of artificial irregularities by the Iceland radar are also presented. The heated region has been measured to extend over a horizontal distance of 170±50km, which by comparison with a model of the heater beam pattern corresponds to a threshold electric field for FAI of between 0.1 and 0.01V/m. Differences between field-aligned and vertical propagation heating are also presented.

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