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。
The orbit of the satellite constellation for local navigation system is discussed.
讨论了区域卫星导航系统卫星星座设计中所用卫星轨道类型。
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