GPS World, September 2011
TRANSPORTATION Marine FIGURE 4 Reported AIS positions of THV Galatea from one day of the GPS jamming demonstrations The trace shows the reported positions in and out of port but shows that the vessels AIS unit failed safe and did not report any erroneous positions Image from www shipais com FIGURE 4 Effect of Jamming on Safe Navigation Satellite Constellation FIGURE 5 Three satellite window over Belfast October 2009 21 satellite constellation FIGURE 5 GPS World September 2011 www gpsworld com 54
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