- Posted April 2, 2014 by
This iReport is part of an assignment:
Russian GPS Failure (Glonass)
It is possible this was some sort of selective availability test in order to deny the use of Glonass to non military users. If the orbit information was altered in a way that special military receivers could still decode the ephemeris messages but show up as "Illegal" to civilian users, then only the special military receivers would work.
The attached image shows the period of time where Glonass orbit information was not valid, it was taken from the following web page: