Now this is interesting, Russian GLONASS down for 12 hours

From: Rod 
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So the entire Russian NAVSAT constellation disappears for 12 hours.
Given what is going on you have to ask, did we do it? Did the Russians so  
they could blame us?
Or maybe it was SPECTRE? ;p http://en.wikipedia.org/wiki/SPECTRE

http://gpsworld.com/glonass-gone-then-back/

Cue space march!
http://www.youtube.com/watch?v=WczHADTsIec&feature=share&list=RDWczHADTsIec

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=============================================================== From: Stephen Kraus ------------------------------------------------------ Could be they are testing a denial of service system similair to what we have with GPS. If we go to war with a country who uses GPS, they disable/disorient the C codes (Civilian Navigation codes) and switch to only P codes (the encrypted military only navigation codes)

=============================================================== From: Lynn Dixon ------------------------------------------------------ As a side comment, having a GPS system controlled by the Department of Defense is a bad idea in todays age. It's one of the reasons aircraft can't use GPS as a primary means of navigation. The DoD doesn't have to answer to the FAA, so it can "degrade" its signal at any time, with no reason and without any votes from the parties whom have a vested interest in it. This could be *bad* for aircraft using it as their primary navigation means.

=============================================================== From: Stephen Kraus ------------------------------------------------------ Unfortunately, as GPS is the primary means of controlling and navigating many combat aircraft, there is a need to be able to degrade it. I agree however, there needs to be a 100% reliable and infallible civilian only global positioning system.