what if it was intentional (signal-jamming experiment)? like what North Korea is doing to South Korea. http://newsinfo.inquirer.net/breakingnews/world/view/20110306-323798/N-Korea-jammed-S-Korea-GPS-devices
On Tue, Mar 8, 2011 at 9:52 AM, Jim Morgan <j...@datalude.com> wrote: > A general GPS tech article, rather than a mapping-related one, but I > thought it might be interesting anyway. > > > IT WAS just after midday in San Diego, California, when the disruption > started. In the tower at the airport, air-traffic controllers peered at > their monitors only to find that their system for tracking incoming planes > was malfunctioning. At the Naval Medical Center, emergency pagers used for > summoning doctors stopped working. Chaos threatened in the busy harbour, > too, after the traffic-management system used for guiding boats failed. On > the streets, people reaching for their cellphones found they had no signal > and bank customers trying to withdraw cash from local ATMs were refused. > Problems persisted for another 2 hours. > > It took three days to find an explanation for this mysterious event in > January 2007. Two navy ships in the San Diego harbour had been conducting a > training exercise. To test procedures when communications were lost, > technicians jammed radio signals. Unwittingly, they also blocked radio > signals from GPS satellites across a swathe of the city. > > Continues ... > < > http://www.newscientist.com/article/dn20202-gps-chaos-how-a-30-box-can-jam-your-life.html?full=true&print=true > > > > > -- > > datalude: information security > e: j...@datalude.com > Philippines: +63 2 403 1311 / mob: +63 917 849 3939 > Hong Kong: +852 6840 6693 > w: http://www.datalude.com/ > > _______________________________________________ > talk-ph mailing list > talk-ph@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-ph >
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