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Sun is a threat to Global Positioning System

Scientists said Wednesday that solar flares might threaten the Global Positioning System. This after a Dec. 6 solar burst affected almost every GPS receiver on the lighted half of Earth. The system is used for everything from guiding cars to placing phone calls to synchronizing money transfers. Solar activity rises and falls every 11 years, with the next peak expected in 2011.

The Washington Post added that there are two ways to shield the system and that both are very expensive. We could alter the GPS antennas to block out solar signals or replace all GPS satellites with ones that use a stronger signal.

Both stories leave me wanting to know more about the solar burst in December.