Blar i forfatter "Senior, A."

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    • Controlled beat-wave Brillouin scattering in the ionosphere 

      Eliasson, Bengt; Senior, A.; Rietveld, Michael T.; Phelps, A.D.R.; Cairns, R.A.; Ronald, K.; Speirs, D.C.; Trines, R.M.G.M.; McCrea, Ian; Bamford, R.; Mendonça, J.T.; Bingham, R. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-27)
      Stimulated Brillouin scattering experiments in the ionospheric plasma using a single electromagnetic pump wave have previously been observed to generate an electromagnetic sideband wave, emitted by the plasma, together with an ion- acoustic wave. Here we report results of a controlled, pump and probe beat-wave driven Brillouin scattering experiment, in which an ion-acoustic wave generated by the ...

    • Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities. 

      Senior, A.; Rietveld, Michael T.; Borisov, N.D.; Kosch, M.J.; Yeoman, T.K.; Honary, F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2004-11-03)
      We present radar backscatter power measurements using the CUTLASS HF radar at Hankasalmi, Finland from F-region field-aligned irregularities induced by HF radio pumping with the EISCAT Heating facility. A novel radar operating mode is used in which the radar frequency is rapidly swept through a number of bands, making use of the varying ionospheric refraction to probe different heights within the ...

    • Multi-frequency SuperDARN radar observations of the modulated ionosphere by high-power radio-waves at EISCAT 

      Mahmoudian, A.; Yeoman, T. K.; Senior, A.; Kosch, M.; Scales, W. A.; Shi, X.; Ruohoniemi, M.; Rietveld, Michael T (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-02)
      This paper presents the first joint observations of multi-frequency SuperDARN (Super Dual Auroral Radar Network) radar of the heated ionosphere by high-power high-frequency (HF) ground-based radio-waves along with the stimulated electromagnetic emissions (SEE) measurements. The unique heating experiment design at EISCAT (The European Incoherent Scatter Scientific Association) including fine frequency ...