[2] Federal Aviation Administration.Global Positioning System (GPS) Standard Positioning Service (SPS) perfor-mance analysis report[R].Washington: FAA, 2015.
[4] U.S.Department of Defense.Global positioning system standard positioning service signal specification[S].United States, 1993.
[5] U.S.Department of Defense.Global positioning system standard positioning service signal specification[S].United States, 1995.
[6] U.S.Department of Defense.Global positioning system standard positioning service performance standard[S].United States, 2001.
[7] U.S.Department of Defense.Global positioning system standard positioning service performance standard[S].United States, 2008.
[8] OCHENG W Y, SHERIDAN K F, SAUER K, et al.An assessment of the RAIM performance of a combined Galileo/GPS navigation system using the Marginally Detectable Errors(MDE)algorithm[J].GPS Solutions, 2002, 5(3):42-51.