The number of GLONASS satellites used for its intended purpose has reached nineteen
We will not have to wait for the results of the February launch of new GLONASS satellites to finally see some increase in the availability of the navigation signal (that is, an increase in the fraction of the total time of day during which navigation with the desired accuracy is possible). Right today, the number of satellites involved is more thanit was yesterday : one of those satellites that were temporarily removed from the orbital constellation due to maintenance has now returned to service.
Here is the new map of the availability of the navigation signal: ')
It is not difficult to see that now the signal interruptions in most of our Russia last about 1 hour a day, and today the navigation signal along the Volga came uninterruptedly from space. This area of uninterrupted operation, however, is not permanent, but will smoothly shift along the Earth as the satellite system in near space orbits.