The GLONASS system is fully switch to the use of third-generation satellite "Glonass-K", according to plans by 2020.
New cameras are able to orbit up to ten years, as opposed to the seven years of its predecessors. Also, compared with the second generation of satellites twice increased positioning accuracy — up to 2.5 meters for civilian users. Launch of the first satellite of third generation "Glonass-K" took place in February 2011. He is currently undergoing flight tests.
The transition will be accomplished by gradually: the satellites "Glonass-M" will be replaced by new models in the period from 2014 to 2020. In 2013, plans to launch five satellites of the GLONASS system, one of which belongs to the third generation of satellites — its launch, as previously reported by JSC "RCS", was moved to December 2012 due to technical reasons.
In 2012, within the framework of the federal target program "Maintenance, development and use of the GLONASS system for 2012 — 2020" was able to maintain the accuracy of positioning navigation system at the level of 2.8 meters at almost full global availability of the signal. In January 2013, "Roskosmos" has announced that by 2015, the accuracy should be increased to 1.4 meters, and in 2020 — up to 0.6 meters.
According to "Roskosmos", currently in orbit 29 vehicles. Of these, 24 (staff numbers) are used as intended, the three satellites are in reserve — one to the maintenance and the machine "Glonass-K" is being tested.