Russian GLONASS offline for 11 hours

[nsaspook]

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

In an unprecedented total disruption of a fully operational GNSS constellation, all satellites in the Russian GLONASS broadcast corrupt information for 11 hours, from just past midnight until noon Russian time (UTC+4), on April 2 (or 5 p.m. on April 1 to 4 a.m. April 2, U.S. Eastern time). This rendered the system completely unusable to all worldwide GLONASS receivers. Full and correct service has now been restored.

Bad software update?

 

[Greg Bernhardt]

What are the sats used for? I always assume a hacking these days :)

 

[nsaspook]

Positioning, navigation and timebase services just like the US GPS system.
http://www.bbc.com/news/science-environment-26957569