Scintillation of Venus and Mars Express radio signal on interplanetary and ionosphere plasma

Guifre Molera Calves, S.V. Pogrebenko, G. Cimò, D.A. Duev, T.M. Bocanegra Bahamón

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific


    Observations of spacecraft radio signals give a unique opportunity to study the temporal and spatial behaviour of the signal’s phase fluctuations caused by its propagation through the inter-planetary plasma and the Earth’s ionosphere. The phase scintillation of the telemetry signal of the European Space Agency’s (ESA) Venus Express (VEX) and Mars Express (MEX) spacecraft was observed at X-band with a number of radio telescopes of the European VLBI Network (EVN) in the period 2008–2014.It was found that the phase scintillation spectra follow a Kolmogorov distribution with nearly constant spectral index of -2.42 for a full range of orbital phases. The scintillation index and Doppler noise along the orbit from superior conjunction to the greatest elongation is dominated by the solar wind plasma. Here, I will present the latest results of these observations, while Venus is approaching the inferior conjunction, and where the Earth ionosphere starts to dominate.
    Original languageEnglish
    Title of host publication12th European VLBI Network Symposium and Users Meeting
    PublisherScuola Internazionale Superiore di Studi Avanzati (S I S S A)
    Number of pages6
    Publication statusPublished - Oct 2015
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventEuropean VLBI Network Symposium and Users Meeting - Cagliari, Italy
    Duration: 7 Oct 201410 Oct 2014
    Conference number: 12

    Publication series

    NameProceedings of Science
    ISSN (Electronic)1824-8039


    ConferenceEuropean VLBI Network Symposium and Users Meeting
    Abbreviated titleEVN Symposium

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