Detailed measurements of the electric field strength associated with the Ku-band radar and S-band communication link were made by the Plasma Diagnostics Package (PDP) on STS 51F. These measurements were made while the PDP was attached to the Remote Manipulation System arm and again while the PDP was released as a subsatellite. The results indicate that cargo elements that remain inside of the scan limits of the radar should experience fields less than 2 V/m and that elements that may encounter the main beam can use 300 V/m as a design guideline with adequate safety margin. S-band fields tended to be several dB lower than worst-case predictions. Safe design practice indicates that an electric field E = 100/r (r in meters) should be used as a guideline for deployable systems. S-band electric fields within the cargo bay envelope should be less than 2 V/m even with edge diffraction effects and reflections from other payloads taken into account. The absolute accuracy of these measurements is about 2 dB.


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    Title :

    Orbiter environment at S- and Ku-band frequencies


    Contributors:


    Publication date :

    1988-02-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Orbiter environment at S- and Ku-band frequencies

    MURPHY, G. B. / CUTLER, W. D. | AIAA | 1988


    Orbiter S-band communications subsystem

    Bacinski, R.R. / Helgeson, R.J. | Tema Archive | 1978




    Orbiter Ku-band integrated radar and communications subsystem

    Cager, R.H. jun. / La Flame, D.T. / Parode, L.C. | Tema Archive | 1978