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>
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