The Naval Research Laboratory (NRL) conducts comprehensive analyses of the Global Positioning System (GPS) atomic frequency standards under the sponsorship of the 2nd Space Operations Squadron (2SOPS) at the Master Control Station (MCS) in Colorado Springs, Colorado. The analysis is based on clock estimates that NRL computes from GPS monitor station carrier-derived pseudo- range measurements and National Geospatial-Intelligence Agency (NGA) computed precise post-fit orbit ephemerides. The purpose of the analyses is to determine the performance of the timing signals originating from the atomic frequency standards onboard the space vehicles. Metrics used in the analyses include frequency, drift, stability profiles, and stability histories based on the Allan and Hadamard variances. The relative performance of the space vehicle clocks is ranked and presented according to the clock types flown in GPS. An overview of the GPS constellation with respect to the lifetimes of space vehicles and space vehicle clocks, both active and deactivated, is also presented.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Summary of the GPS Constellation Clock Performance


    Contributors:
    J. Oaks (author) / J. A. Buisson (author) / M. M. Largay (author)

    Publication date :

    2007


    Size :

    13 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Global Positioning System Constellation Clock Performance

    J. Oaks / M. M. Largay / W. G. Reid et al. | NTIS | 2002


    Constellation Commodities Studies Summary

    Dirschka, Eric | NTRS | 2011


    Bridging Clock Gaps in Mega-Constellation LEO Satellites

    Wang, Kan / El-Mowafy, Ahmed / Rizos, Chris | British Library Conference Proceedings | 2022


    Summary of Session 5: Debris Mitigation Measures of Constellation

    Toda, S. | British Library Online Contents | 1996


    Summary of Session 5: Debris Mitigation Measures of Constellation

    Toda, S. / Earth Space Institute | British Library Conference Proceedings | 1996