With the BeiDou system set to be completed in May, China is stepping up efforts to sell other countries on its global satellite navigation system.
Satellite orbits and clocks are determined using observation data from a global ... Operational orbit and clock products for GPS, GLONASS, Galileo, BeiDou and QZSS are generated at GSOC using the ...
BeiDou and GPS are two of the four core providers of global satellite navigation systems, along with Russia's Global Navigation Satellite System, or GLONASS, and the European Union's Galileo.