Glonass is Russia's answer to the U.S. Global Positioning System, or GPS, and is designed for both military and civilian uses.
"We are planning to carry out two Glonass satellites this year," Roscosmos head Vladimir Popovkin said in an interview with Vesti 24 television.
A group of 31 Glonass satellites is currently in orbit, with 24 operating to provide global coverage, four in reserve and one undergoing trials.
Russia may spend 346.5 billion rubles (almost $12 bln) on the maintenance and further development of the Glonass network in 2012-2020.