The UK may have become dangerously over-reliant on satellite-navigation signals, according to a report from the Royal Academy of Engineering. Use of space-borne positioning and timing data is now widespread, in everything from freight movement to synchronisation of computer networks. The academy fears that too many applications have little or no back-up were these signals to go down. Read more
The Air Force says a software glitch in its GPS network in January temporarily left some defence systems unable to lock onto locator signals from satellites, but the problem has since been fixed. The Air Force Global Positioning Wing said Friday one program halted operations as a precaution, but it didn't identify the program. Read more