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Playing It Safe

机译：安全玩

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Europe's Galileo satellite navigation constellation differs from the U.S.'s GPS in that it will guarantee reliability of its signal in return for a fee. But civil aviation authorities are skeptical that Europe's space sector can meet navigation and communications safety standards, and they question who among Galileo's public and private stakeholders is willing to sign off on such guarantees. When Galileo enters full service in 2020, it will comprise a civilian-controlled constellation of 30 navigation, positioning and timing satellites offering both free and fee-based services, with the latter including encrypted navigation signals that resist interference and ensure continuity of service. Patrick Ky, executive director of the European Aviation Safety Agency (EASA), says he sees great potential for satellite navigation to aid the civil aviation sector, notably for small aircraft operating in remote locations and-in the future-autonomous drones. But he says such opportunities will come with responsibility, both for ensuring air passenger safety and providing aircraft navigation services at a competitive price.
机译：欧洲的伽利略卫星导航星座与美国的GPS有所不同，它将保证其信号的可靠性，但需付费。但是民航当局对欧洲航天部门能否达到导航和通信安全标准表示怀疑，他们质疑伽利略的公共和私人利益相关者中谁愿意签署此类保证。当伽利略号（Galileo）在2020年开始全面服务时，它将由30个由民用控制的导航，定位和定时卫星组成，同时提供免费和收费服务，后者包括可抵抗干扰并确保服务连续性的加密导航信号。欧洲航空安全局（EASA）执行董事帕特里克·凯（Patrick Ky）表示，他认为卫星导航有巨大的潜力来协助民航领域，尤其是在偏远地区以及未来的无人驾驶飞机上运行的小型飞机。但是他说，这样的机会将伴随责任，既要确保航空旅客的安全，又要以有竞争力的价格提供飞机导航服务。

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