The city district space navigation system is closely relevant to people's daily life, provides convenient guides for the traffic, and is a significant part of a city's image.

城市街区空间引导系统与人们的日常生活息息相关，为人们的出行提供了便捷的标识引导，同时它也是城市形象的重要组成部分之一。

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The Launch and Test Range System includes ground-based surveillance, navigation, flight operations and analysis, command and control, communications and weather assets for space missions.

发射和测试系统包括空间飞行的地面系统任务的监视，导航，飞行操作和分析，指挥和控制，通信和气象资产。

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The European Space Agency's Galileo constellation - the world's most sophisticated satellite navigation system which was launched today - will have SELEX Galileo's PHM atomic clocks on board.

SELEX Galileo公司今天推出Galileo星座，该星座是世界上最先进的卫星导航系统，卫星上将装备SELEX Galileo公司的PHM原子钟。

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Although spacecraft instruments are set to return photographs and compositional data, the encounter primarily is a test of Deep Space 1's autonomous navigation system, the last of 12 technologies the mission was designed to pioneer.

CNN: Spacecraft set for risky asteroid flyby

The UK Space Agency, through its membership of Esa, is now arguing strongly for the Astrium autonomous navigation system to be incorporated into the 2018 rover.

BBC: Smart UK navigation system for Mars rover