In early 2000, the National Aeronautics and Space Administration (NASA) commenced the Ka-Band Transition Project (KaTP) as another step towards satisfying wideband communication requirements of the space research and earth exploration satellite services. Over the past three years, this project has upgraded the ground segment portion of NASA's Space Network (SN) to enable high data rate space science and earth science services communications. NASA conducted the SN ground segment upgrades in conjunction with space segment upgrades implemented via the Tracking and Data Relay Satellite (TDRS)HIJ project. The three new geostationary data relay satellites developed under the TDRSHIJ project support the use of the intersatellite service allocation in the 25.2527.5 GHz band to receive high speed data from low earth-orbiting customer spacecraft. All of the TDRSHIJ spacecraft have been launched successfully. These spacecraft support 650 MHz-wide Ka-band telemetry return links that have the capability to support data rates up to at least 1.2 Gbps. Prior to the Ka-band Transition Project, the existing SN ground segment infrastructure was capable of supporting Ka-band return services at data rates up to 300 Mbps via the 225 MHz-wide return link channels of the TDRSHIJ spacecraft. The ground segment upgrades implemented under the KaTP have enabled a new SN Ka-band Single Access Return (KaSAR)Wideband Intermediate Frequency service that uses the new TDRSHIJ 650 MHz-wide channels. In parallel to the SN Ka-band ground segment upgrades, KaTP has implemented a Ka-Band demonstration ground terminal at NASA's Wallops Flight Facility (WFF) in Virginia. NASA developed this Ka-Band ground terminal to demonstrate that NASA's Ground Network (GN) can support wideband direct-to-ground communications with low-Earth orbiting science spacecraft in the allocated band of 25.5 to 27.0 GHz. Detailed descriptions of the KaTP and TDRSHIJ projects were already provided in papers submitted to previous SpaceOps conferences and other international conferences. This paper will be a follow-up to reference 'NASA/GSFC Ground Segment Upgrades For Ka-Band Support To Near-Earth Spacecraft.' This paper will describe the results of preliminary high data rate SN and GN demonstrations that were recently conducted as part of the KaTP. The SN and GN demonstrations included tests at 600 Mbps.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Results from Preliminary NASA/GSFC Ka-Band High Data Rate Demonstrations for Near-Earth Communications


    Beteiligte:
    Y. Wong (Autor:in) / B. Gioanini (Autor:in) / S. N. Bundick (Autor:in)

    Erscheinungsdatum :

    2004


    Format / Umfang :

    14 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch