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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 8
Ann. Geophys., 16, 969–973, 1998
© European Geosciences Union 1998
Ann. Geophys., 16, 969–973, 1998
© European Geosciences Union 1998

  31 Aug 1998

31 Aug 1998

Imaging of structures in the high-latitude ionosphere: model comparisons

D. W. Idenden1, R. J. Moffett1, M. J. Williams2, P. S. J. Spencer2, and L. Kersley2 D. W. Idenden et al.
  • 1School of Mathematics and Statistics, University of Sheffield, The Hicks Building, Sheffield, S3 7RH, UK
  • 2Department of Physics, University of Wales, Aberystwyth, SY23 3BZ, UK

Abstract. The tomographic reconstruction technique generates a two-dimensional latitude versus height electron density distribution from sets of slant total electron content measurements (TEC) along ray paths between beacon satellites and ground-based radio receivers. In this note, the technique is applied to TEC values obtained from data simulated by the Sheffield/UCL/SEL Coupled Thermosphere/Ionosphere/Model (CTIM). A comparison of the resulting reconstructed image with the 'input' modelled data allows for verification of the reconstruction technique. All the features of the high-latitude ionosphere in the model data are reproduced well in the tomographic image. Reconstructed vertical TEC values follow closely the modelled values, with the F-layer maximum density (NmF2) agreeing generally within about 10%. The method has also been able successfully to reproduce underlying auroral-E ionisation over a restricted latitudinal range in part of the image. The height of the F2 peak is generally in agreement to within about the vertical image resolution (25 km).

Key words. Ionosphere (modelling and forecasting; polar ionosphere) · Radio Science (instruments and techniques)

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