fix due to over 50 satellites being available. In indoor, urban canyon or mountainous areas, accuracy can be greatly improved over using GPS alone. For using both navigation systems simultaneously, precision of GLONASS/GPS navigation definitions were with mean number of NSV equals 14—19 (depends on station). In May 2009, Anatoly Perminov, then director of the Roscosmos, stated that actions were undertaken to expand GLONASS's constellation and to improve the ground segment to increase the navigation definition of GLONASS to an accuracy of by 2011. In particular, the latest satellite design, GLONASS-K has the ability to double the system's accuracy once introduced. The system's ground segment is also to undergo improvements. As of early 2012, sixteen positioning ground stations are under construction in Russia and in the Antarctic at the Bellingshausen and Novolazarevskaya bases. New stations will be built around the southern hemisphere from Brazil to Indonesia. Together, these improvements are expected to bring GLONASS' accuracy to 0.6 m or better by 2020. The setup of a GLONASS receiving station in the Philippines is also now under negotiation. History See also Aviaconversiya – a Russian satellite navigation firm BeiDou – Chinese counterpart Era-glonass – GLONASS-based system of emergency response Galileo – European Union's counterpart Global Positioning System - American counterpart List of GLONASS satellites Multilateration – the mathematical technique used for positioning NAVIC – Indian counterpart Tsikada – a Russian satellite navigation system Notes References Standards Bibliography GLONASS Interface Control Document, Edition 5.1, 2008 (backup) GLONASS Interface Control Document, Version 4.0, 1998 External links Official GLONASS web page Navigation satellite constellations Space program of Russia Space program of the Soviet Union Soviet inventions Wireless locating Earth observation satellites of the Soviet Union Military equipment introduced in the 1980s