[OSM-talk] US to spend $8bn upgrading GPS constellation

[Robert Scott]

On Wednesday 26 May 2010, Maarten Deen wrote:
> Can someone explain to me why an ATM would need a GPS in order to dispense
> cash? Or why Wall Street needs it to trade? These things are stationary.
> Ok, maybe stock traders can use it to see where shipments of the companies
> the trade in are, but that seems pretty far fetched. Still, ATMs?

My guess is they use the time signal. Perhaps the terrestrial radio time signals aren't secure enough.


robert.