1. Christie JRI, Bentley PB, Ciboci JW, Gellrich CA, Gondek JM, Knoth BK, Ressler MB, Oetzel GN (2004) GPS signal quality monitoring system. In: ION GNSS 17th international technical meeting of the satellite division, Long Beach, CA, 21–24 September 2004, pp 2239–2245
2. Graf S, Gunther C (2006) Analysis of GIOVE-A L1-signals. In: ION GNSS 19th international technical meeting of the satellite division, Fort Worth, TX, 26–29 September 2006, pp 1560–1566
3. He C, Guo J, Lu X, Lu J (2015) Generation mechanisms of GNSS navigation signal distortions and influence on ranging performance. Syst Eng Electron 37(7):P1611–P1620
4. European GNSS (2016) (Galileo) Open Service Signal-In-Space Interface Control Document, Issue 1.3, European Union
5. Betz JW (2013) Something old, something new. InsideGNSS July/August, 34–42