Initial test results indicated that the Global Positioning System/Time Transfer Unit (GPS/TTU) performed well within the + or - 100 nanosecond range required by the original system specification. Subsequent testing involved the verification of GPS time at the master control site via portable clocks and the acquisition and tracking of as many passes of the space vehicles currently in operation as possible. A description and discussion of the testing, system modifications, test results obtained, and an evaluation of both GPS and the GPS/TTU are presented.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    USNO GPS program


    Contributors:


    Publication date :

    1981-03-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    USNO time and you

    Matsakis, D. | IEEE | 2002


    The 488,006,860 Stars in the USNO-A1.0 Catalog

    Monet, D. G. / American Astronautical Society; Space Flight Mechanics Technical Committee / American Institute of Aeronautics and Astronautics; Astrodynamics Technical Committee | British Library Conference Proceedings | 1998


    Star Catalogs from the USNO PMN

    Monet, D. G. / American Astronautical Society| AIAA | British Library Conference Proceedings | 1995


    Star Catalogs from the USNO PMM

    Monet, D. G. / American Astronautical Society | British Library Conference Proceedings | 1995


    Consistency and Quality of USNO Analysis Center Products

    C. Hackman / P. Barrett / P. Kammeyer et al. | NTIS | 2007