It's one of four global (全球的) navigation networks, including the United States' GPS, Russia's GLONASS and the European Union's Galileo.

这是全球四大导航网络之一，其他三个是美国的全球定位系统、俄罗斯的格洛纳斯和欧盟的伽利略。

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It might be interesting to know that MEO is the orbit of GPS, Glonass and Galileo satellites. It is also interesting that Russia is shutting down their GPS stations.

中地球轨道是全球定位系统（美国）、格洛纳斯系统（俄罗斯）和伽利略定位系统（欧洲）等导航卫星运行的轨道。另外，俄罗斯正在关闭国境内全球定位系统的地面工作站。

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Instead of relying solely on GPS to determine position, the SiRFstarV architecture gathers real-time information from GPS, Galileo, Glonass and Compass (when operational) satellites, multiple radio systems, such as cellular and Wi-Fi(R), and multiple MEMS sensors, like accelerometers, gyros and compasses.

ENGADGET: CSR sharpens indoor and in-car navigation with SiRFstarV, SiRFusion and SiRFprimaII

It integrates a multi-GNSS location engine supporting GPS, Galileo, Glonass and Compass satellites to improve the navigation system performance in obstructed environments, Combined with SiRFDRive(R) dead reckoning software, the SiRFprimaII delivers seamless navigation experience whether driving in dense urban canyons or through tunnels or multistory parking lots.

ENGADGET: CSR sharpens indoor and in-car navigation with SiRFstarV, SiRFusion and SiRFprimaII