High-accuracy spacecraft tracking requires tropospheric modeling which is generally scaled by either estimated or measured values of surface refractivity. This report summarizes the results of a worldwide surface-refractivity test conducted in 1968 in support of the Apollo program. The results are directly applicable to all NASA radio-tracking systems. (Author)


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    Titel :

    Surface Refractivity Measurements at NASA Spacecraft Tracking Sites


    Beteiligte:
    P. E. Schmid (Autor:in)

    Erscheinungsdatum :

    1972


    Format / Umfang :

    49 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch