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    Where’s my GPS? Is it really blocked by trees? Predicting UAV GPS Impairment by Buildings and Foliage

    Andrew Moore / Nick Rymer | NTRS
    Keywords: GPS

    A decade of successful cooperation: what's next for the international GPS service?

    Beck, N. / Dow, J. / Gendt, G. et al. | NTRS | 2003
    Keywords: GPS international GPS service continuous GPS permanent GPS networks

    Navigation Performance Analysis and Trades for the Lunar GNSS Receiver Experiment (LuGRE)

    Lauren Konitzer / Nathan Esantsi / Joel Parker | NTRS
    Keywords: GPS

    Global Positioning System Constellation Modernization Impact on Sidelobe Capable GPS Receivers in Geostationary Orbit

    Graeme Ramsey / Jim Chapel / Mark Crews et al. | NTRS
    Keywords: GPS

    The Lunar GNSS Receiver Experiment (LuGRE)

    Joel J K Parker / Fabio Dovis / Benjamin Anderson et al. | NTRS
    Keywords: GPS

    Global Positioning System Navigation Above 76,000 km for NASA's Magnetospheric Multiscale Mission

    Luke B Winternitz / William A Bamford / Samuel R Price et al. | NTRS | 2017
    Keywords: GPS

    GPS capabilites: A three-part presentation

    Bar-Sever, Y. / Lichten, S. / Young, L. | NTRS | 2001
    Keywords: GPS navigation

    Volume Raycasting of GNSS Signals through Ground Structure Lidar for UAV Navigational Guidance and Safety Estimation

    Andrew J Moore / Matthew Schubert / Nicholas Rymer et al. | NTRS
    Keywords: GPS

    An analysis of GPS occultations from Mt. Tsukuba and Mt. Fuji

    Zuffada, C. / Hajj, G. / Tsuda, T. et al. | NTRS | 2003
    Keywords: GPS occultations Mt. Tsukuba

    GPS Space Service Volume: Ensuring Consistent Utility Across GPS Design Builds for Space Users

    Bauer, Frank H. / Parker, Joel Jefferson Konkl / Valdez, Jennifer Ellen | NTRS | 2015
    Keywords: GPS

    The international GPS service tracking network: enabling diverse studies and projects through international cooperation

    Moore, A. / Neilan, R. | NTRS | 2003
    Keywords: GPS global network reference network

    Precise Real-Time Low Earth Orbitor Navigation With GPS

    Bertiger, W. / Haines, B. / Kuang, D. et al. | NTRS | 1998
    Keywords: Navigation Low Earth Orbitor GPS

    Orbiting GPS Receiver Modified to Track New L2C Signal

    Meehan, Tom K. / Robison, David / Munson, Tim N. et al. | NTRS | 2006
    Keywords: GPS receiver

    Alternative ionospheric correction algorithms for satellite-based augmentation systems in low-latitude region

    Komjathy, A. / Sparks, L. / Mannucci, T. et al. | NTRS | 2003
    Keywords: GPS total electron content ionosphere validation modeling

    GPS Measurements of Earth Rotation - The Contribution of the International GPS Service

    Neilan, R. / Beutler, G. / Feissel, M. et al. | NTRS | 2000
    Keywords: GPS Earth Rotation Earth Orientation

    Precise orbit determination for the shuttle radar topography mission using a new generation of GPS receiver

    Bertiger, W. / Bar-Sever, Y. / Desai, S. et al. | NTRS | 2000
    Keywords: SRTM GPS orbit

    The International GPS Service (IGS) as a Continuous Reference System for Precise GPS Positioning

    Neilan, Ruth / Heflin, Michael / Watkins, Michael et al. | NTRS | 1996
    Keywords: GPS data geodetic geophysical research

    Addressing the Influence of Space Weather on Airline Navigation

    Sparks, Lawrence | NTRS | 2012
    Keywords: Global Positioning System (GPS)

    Autonomous Spacecraft Navigation Using Above-the-Constellation GPS Signals

    Winternitz, Luke | NTRS | 2017
    Keywords: GPS

    TDRSS Augmentation Service for Satellites (TASS)

    Heckler, Gregory W. / Gramling, Cheryl / Valdez, Jennifer et al. | NTRS | 2016
    Keywords: GPS

    GPS Operations in High Earth Orbit Recent - Experiences and Future Opportunities

    Ashman, Benjamin / Bauer, Frank / Parker, Joel et al. | NTRS | 2018
    Keywords: high-altitude GPS

    GPS Operations in High Earth Orbit: Recent Experiences and Future Opportunities

    Ashman, Benjamin W. / Bauer, Frank H. / Parker, Joel J. K. et al. | NTRS | 2018
    Keywords: high-altitude GPS

    Satellite Constellations for Atmospheric Sounding with GPS: A Revolution in Atmospheric and Ionospheric Research

    Yunck, T. P. / McCleese, D. J. / Melbourne, W. G. et al. | NTRS | 1995
    Keywords: Global Positioning System GPS Atmospheric Science Ionosphere

    NASA's global differential GPS system and the TDRSS augmentation service for satellites

    Bar-Sever, Yoaz / Young, Larry / Stocklin, Frank et al. | NTRS | 2004
    Keywords: Global Postitioning Satellite (GPS)

    The Ionospheric Impact of the October 2003 Storm Event on WAAS

    Komjathy, Attila / Sparks, Lawrence / Mannucci, Anthony J. et al. | NTRS | 2004
    Keywords: GPS

    TOPEX/POSEIDON Orbit Determination With Laser and GPS Auto-Spoofing Data,

    Cangahuala, L. A. | NTRS | 1995
    Keywords: sea level radial orbit GPS anti-spoofing POD

    A New Centimeter-Level Real-Time Global Navigation and Positioning Capability with GPS

    Bar-Sever, Yoaz | NTRS | 2001
    Keywords: GPS

    GPS Based Attitude Determination for Spacecraft: System Engineering Design Study and Ground Testbed Results

    Breckenridge, William / Craymer, Loring / Sevaston, George E. | NTRS | 1996
    Keywords: GPS

    Future Technologies for Earth Science with Spaceborne GPS

    Yunck, T. P. / Meehan, T. K. / Srinivasan, J. M. et al. | NTRS | 1995
    Keywords: remote sensing geodesy geophysics microsatellites GPS

    SATS: Small, Automated Tracking System - - Elements of a Better System for Satellite Tracking and Telemetry

    Srinivasan, Jeffrey M. / Lichten, Stephen M. / Haines, Bruce J. et al. | NTRS | 1994
    Keywords: GPS Global Positioning System navigation spacecraft orbits data communication

    Incorporation of Orbital Dynamics to Improve Wide-Area Differential GPS

    Parkinson, B. / Yunck, T. / Mullerschoen, R. et al. | NTRS | 1995
    Keywords: GPS

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