To maintain its competitive position in the 1990s, satellite communications must evolve to provide new services and to reduce the costs of supplying existing services. NASA's Advanced Communications Technology Satellite (ACTS) program is directed toward developing the technology base that will support this evolution. The ACTS communications payload is optimized for digital communications using a time-division multiple-access format. Scanning spot-beam antennas provide high-performance, on-demand service to communications earth stations. On-board processing and switching allow full connectivity in a single-hop network architecture. ACTS employs Ka-Band (30/20 GHz) links for communications traffic and includes techniques for mitigating rain fades. The prelaunch test program has verified that all critical payload performance requirements have been realized, including G/T, EIRP, beam coverage, AM/AM, AM/PM, and BER vs. E(b)/N(o). Scheduled to be launched by a Space Shuttle in 1993, ACTS will provide in-orbit technology verification and support experimental communications networks for up to four years.


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    Titel :

    ACTS Multibeam Communications Package - Description and Performance Characterization


    Beteiligte:

    Kongress:

    AIAA International Communication Satellite Systems Conference and Exhibit ; 1992 ; Washington, DC, United States


    Erscheinungsdatum :

    1992-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch





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    Graebner, John C. / Cashman, William F. | NTRS | 1990


    ACTS multibeam communications package - Technology for the 1990s

    GRAEBNER, JOHN / CASHMAN, WILLIAM | AIAA | 1990


    ACTS multibeam antenna on-orbit performance

    Acosta, R. / Wright, D. / Mitchell, Kenneth | AIAA | 1996


    ACTS on-orbit multibeam antenna pattern measurements

    Acosta, R. / Wright, D. / Regier, F. | AIAA | 1994