Describes the techniques developed and applied by the Communications Satellite Corporation. As the spacecraft complexity has increased, the scope of in-orbit tests has expanded significantly, and the present techniques have evolved from relatively simple evaluations to sophisticated measurements of satellite performance. The increased test requirements for the INTELSAT IV-A and COMSTAR spacecraft, with their complex antenna and transponder configurations, have led, in an effort to minimize satellite test time, to the develoopment of the semiautomated test setup described in this paper. The specific measurements described are flux density for saturation, spacecraft e.i.r.p., antenna patterns, beam isolation, gain transfer characteristics, gain-to-noise temperature ratio, receiver local oscillator frequencies, TWT turn-on transients, in-band and out-of-band frequency response, and cross polarization.


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    Title :

    In-orbit testing of communications satellites


    Additional title:

    Pruefung der Umlaufbahn von Nachrichtensatelliten


    Contributors:
    Dostis, I. (author) / Mahle, C. (author) / Riginos, V. (author) / Atohoun, I. (author)

    Published in:

    Comsat Technical Review ; 7 , 1 ; 197-226


    Publication date :

    1977


    Size :

    30 Seiten, 1 Quelle


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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