Investigation of the polarization of 50 MHz signals via Sporadic-E reflection

Chris Deacon*, Benjamin Witvliet, Cathryn N. M. Mitchell

*Corresponding author for this work

    Research output: Contribution to conferencePaperAcademicpeer-review


    Sporadic-E (‘Es’) layers in the ionosphere allow communication at much higher frequencies than would be possible via the background ionosphere, especially at solar cycle minimum. Es is created by a different mechanism from the background ionosphere and the creation process and structure are not fully understood. Similarly, the way that radio waves propagate via Es is not well characterised. Because of these factors, and particularly because of its intermittent nature, Es is difficult both to predict and to model. For these reasons Es is either represented very simplistically in ionospheric prediction models or it is not included at all.
    This paper describes an experimental investigation of differential fading between orthogonal polarisations of 50 MHz signals propagated via Es at oblique angles, aimed at improving our understanding of the underlying mechanisms. Initial results indicate that cross-polarisation fading is frequently significant on a timescale from seconds to minutes.
    Original languageEnglish
    Number of pages9
    Publication statusPublished - 12 Aug 2019
    EventNordic HF conference 2019 - Fårö kursgård camp, Fårö, Sweden
    Duration: 12 Nov 201914 Nov 2019


    ConferenceNordic HF conference 2019
    Abbreviated titleNordic HF
    Internet address


    • ionosphere
    • radio wave propagation
    • Sporadic E
    • polarization


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