Abstract The Appleton-Hartree magneto-ionic theory predicts that interference from ground-based transmitters can be registered at satellite orbiting above the F layer peak when foF2 < √2 fcF2 (foF2-peak plasma frequency in the F2 layer below the satellite, fcF2 - electron gyrofrequency at the F2 peak). In spite of this, on the board of the Intercosmos-19 satellite, active from March 1979 to March 1981, the enhancement of radio emission in the whole frequency band of fc < f < foF2 (fc - local electron gyrofrequency, close to satellite), was observed. The same type of emission, was also registered on the board of the Cosmos-1809 satellite launched in December 1986. The comparison of these two observations supports the hypothesis that the ground based transmitters act as a powerful permanent ionospheric excitor which induces electrostatic and electromagnetic waves in the topside ionosphere. The possible physical mechanisms are briefly discussed.


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    Titel :

    Broad-band hectometric emission in the topside ionosphere created by ground-based transmitters


    Beteiligte:
    Klos, Z. (Autor:in) / Kiraga, A. (Autor:in) / Pulinets, S.A. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 10 , 7 ; 177-180


    Erscheinungsdatum :

    01.01.1989


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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