One of the FREESTAR experiments, the Low Power Transceiver (LPT) experiment is a low-power, lightweight software programmable transceiver prototype technology demonstration that is being developed by NASA as a low-cost S-band spacecraft navigation and communication device. The LPT prototype receives Global Positioning System (GPS) satellite signals for spacecraft navigation support and provides both forward and return, low-rate data communications links to the Merritt Island (MILA) and Dryden Flight Research Facility (DFRC) ground stations and to the Tracking and Data Relay Satellite System (TDRSS). The experiment is designed to demonstrate the system's ability to do simultaneous communications and navigation, as well as multi-mode communications and reconfiguration. LPT is managed by NASA's Goddard Space Flight Center and sponsored by NASA/HQ Code M. The LPT experiment consists of one thermally conductive box containing the electronics stack, three S-band antennas and one L-band antenna. The LPT payload uses general Orbiter services, including power control, command, and telemetry provided through the HHC avionics. On-orbit, the LPT payload will be primarily operated via direct communications between LPT and ground stations (MILA, WLPS, or DFRC) and/or TDRSS, with backup command and telemetry capability provided via the hitchhiker avionics and remote Payload Operations Control Center. During operations, LPT will utilize high Sband frequencies for communications. The LPT TDRSS (and GN) forward link (uplink) frequency is 2106.40625 MHz and their TDRSS (and GN) return link (downlink) frequency is 2287.5 MHz (utilizing Left-handed Circular Polarization to work with the TDRSS MA system). Two standard switch panel switches will be utilized to prohibit inadvertent operation of the antenna. An additional inhibit will be provided through the HH avionics power relay to the LPT.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Low Power Transceiver



    Publication date :

    2002-12-16


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    ELECTRIC POWER SOURCE SYNCHRONOUS TRANSCEIVER

    OTSUKA KUNIAKI / MIZUTANI EIJI | European Patent Office | 2020

    Free access

    CAN TRANSCEIVER

    WALRANT THIERRY G C / ENGELHARD AXEL / ELEND BERND UWE GERHARD et al. | European Patent Office | 2023

    Free access

    Optical transceiver

    European Patent Office | 2017

    Free access

    Power saving bidirectional optical transceiver design and fabrication

    Sangirov, J. / Rakib-Uddin, M. / Ukaegbu, I. A. et al. | British Library Online Contents | 2015


    Flight Transceiver

    Hemmati, Hamid | Wiley | 2006