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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 18, issue 1
Ann. Geophys., 18, 56-64, 2000
https://doi.org/10.1007/s00585-000-0056-4
© European Geosciences Union 2000
Ann. Geophys., 18, 56-64, 2000
https://doi.org/10.1007/s00585-000-0056-4
© European Geosciences Union 2000

  31 Jan 2000

31 Jan 2000

The synthesis of travelling ionospheric disturbance (TID) signatures in HF radar observations using ray tracing

A. J. Stocker1, N. F. Arnold2, and T. B. Jones2 A. J. Stocker et al.
  • 1Department of Engineering, Leicester University, University Road, Leicester, LE1 7RH, UK
  • E-mail: sto@ion.le.ac.uk
  • 2Department of Physics, Leicester University, University Road, Leicester, LE1 7RH, UK

Abstract. Characteristic signatures are often observed in HF radar range-time-intensity plots when travelling ionospheric disturbances (TIDs) are present. These signatures, in particular the variation of the F-region skip distance, have been synthesised using a ray tracing model. The magnitude of the skip variation is found to be a function of the peak electron density perturbation associated with the TID and radar frequency. Examination of experimental observations leads to an estimate of the peak electron density perturbation amplitude of around 25% for those TIDs observed by the CUTLASS radar system. The advantage of using the skip variation over the radar return amplitude as an indicator of density perturbation is also discussed. An example of a dual radar frequency experiment has been given. The investigation of the effect of radar frequency on the observations will aid the optimisation of future experiments..

Key words. Ionosphere (auroral ionosphere; ionosphere -atmosphere interactions; ionospheric disturbances)

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