俄罗斯的格洛纳斯系统是世界上第二套全球定位系统。

The deal to the Russian system is the world's second global positioning system.

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其次，格洛纳斯系统卫星可以使用不同的频率，它的抗干扰能力是只能使用一种频率的GPS系统的三倍。

Secondly, the satellite deal to be able to use different frequencies, it is anti-jamming capabilities and can only use a frequency of the GPS system three times.

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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。

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.

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