Brazil is to build a fourth ground station for Russia’s Glonass satellite navigation network in its southernmost state of Rio Grande do Sul. An agrrement was signed this week by the General Director of Russia’s Scientific and Production Corporation Precision Instrument Systems Yuri Roy and Paulo Burmann, rector of Brazil’s Federal University of Santa Maria. Russia currently operates two ground stations in Brazil and a third facility is already planned for the fourth quarter of 2015. The Glonass global navigation system’s 28 satelllites are operated by the Russian Aerospace Defense Forces and is Moscow’s answer to GPS. Last month, the Institute for Telecommunications (Telcor) in Nicaragua also agreed to host Glonass ground stations.