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    Optimal vs. Heuristic Assignment of Cooperative Autonomous Unmanned Air Vehicles

    S. Rasmussen / P. Chandler / J. W. Mitchell et al. | NTIS | 2003

    Assessing the threat of undersampled ionospheric irregularities for wide area differential GPS systems

    Sparks, L. / Pi, X. / Mannucci, A. J. et al. | NTRS | 2001

    The WAAS ionospheric threat model

    Sparks, L. / Mannucci, A. J. / Walter, T. et al. | NTRS | 2001

    A new ionospheric model for wide area differential GPS: the multiple shell approach

    Komjathy, A. / Wilson, B. D. / Runge, T. F. et al. | NTRS | 2002

      A new ionospheric model for wide area differential GPS: the multiple shell approach

      Komjathy, A. / Wilson, B. D. / Runge, T. F. et al. | NTRS | 2002