[talk-ph] GPS article

[Michael Cole]

They were not just jamming the GPS signals, if you read it all he was jamming 
all communication channels to test if the two ships could work together.

Of course other things went down, eg phones.. Because they were also jammed to 
stop the sailors using phones to call ship to ship..

He has taken a small thing out of the whole picture and said it caused all the 
problems..

Tests like that should not be done near shore as they will take out civilian 
methods of communication.  

GPS will not stop a mobile phone.. from operating..

A Jammer on the CELL frequencies will.. same as any other radio based links 
will also go down if they are jammed..

GPS is more and more needed but the ATM's themselves do not have gps units.. 
Unless they were mobile ATMS..



On Tuesday 08 March 2011 12:08:42 pm Rally de Leon wrote:
> 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-Kore
> a-jammed-S-Korea-GPS-devices
> 
> On Tue, Mar 8, 2011 at 9:52 AM, Jim Morgan <jim at 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-ja
> > m-your-life.html?full=true&print=true
> > 
> > 
> > 
> > --
> > 
> >   datalude: information security
> >   e: jim at datalude.com
> >   Philippines: +63 2 403 1311 / mob: +63 917 849 3939
> >   Hong Kong: +852 6840 6693
> >   w: http://www.datalude.com/
> > 
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