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2015年,全球共进行导航卫星发射10次,成功10次,共计13颗导航卫星。其中,美国3次,成功发射全球定位系统-2F(GPS-2F)卫星3颗;欧洲3次,成功发射“伽利略-全运行能力”(Galileo-FOC)卫星6颗;中国3次,成功发射“北斗”导航卫星4颗;印度1次,成功发射“印度区域导航卫星系统”(IRNSS)卫星1颗。截至2015年12月31日,国外在轨运行导航卫星77颗。提供导航服务的卫星55颗,其中,美国GPS系统31颗,俄罗斯“全球导航卫星系统”(GLONASS)23颗,日本“准天顶卫星系统”(QZSS)1颗(主要提供GPS增强服务)。截至2015年底,全球只有GPS、GLONASS和“北斗”区域导航系统投入全面运行服务,为用户提供定位、导航与授时(PNT)服务,并可为GPS、GLONASS、“北斗”双模、多模用户提供高于单系统的定位、导航与授时服务。日本QZSS可提供GPS增强服务,其自主导航信号尚不能单独提供服务。
In 2015, a total of 10 navigating satellites were launched globally, with a total success of 10 and a total of 13 navigation satellites. Among them, the United States successfully launched 3 GPS-2F satellites 3 times in 3 occasions; 6 successfully launched “Galileo-FOC satellites” in Europe 3 times; three times in China, Successfully launched 4 “Beidou” navigation satellites; once in India, successfully launched 1 “Indian Regional Navigation Satellite System” (IRNSS) satellite. As of December 31, 2015, there were 77 navigation satellites in orbit abroad. There are 55 satellites providing navigation services, including 31 GPS systems in the United States, 23 “GLONASS” in Russia and 1 “QZSS” in Japan (mainly providing GPS Enhance service). As of the end of 2015, only GPS, GLONASS and “Beidou” regional navigation systems have been put into full operation in the world to provide users with positioning, navigation and timing (PNT) services, and can be used for GPS, GLONASS, , Multi-mode users to provide more than a single system positioning, navigation and timing services. Japan QZSS can provide GPS enhanced services, its autonomous navigation signal can not provide a separate service.