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of Glonass to 30 meters.The first launch under the Glonass program took place October 12, 1982, but the system was only formally launched September 24, 1993.
Andrei Kozlov, the head of the Reshetnev Research and Production Center in the Siberian city of Krasnoyarsk, Russia's leading spacecraft manufacturer, said earlier the Glonass system currently has 13 satellites in orbit.
The satellites currently in use are of two modifications - Glonass and its updated version Glonass-M. Glonass-M has a longer service life of seven years and is equipped with updated antenna feeder systems and an additional navigation frequency for civilian users.
A future modification, Glonass-K, is an entirely new model based on a non-pressurized platform, standardized to the specifications of the previous models' platform, Express-1000.
Glonass-Ks' estimated service life has been increased to 10-12 years, and a third "civilian" L-range frequency has been
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