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Is the UK's exit from the Galileo satellite navigation system a case of a glass half full or half empty? Certainly one can bemoan the £1.2bn sunk costs and future contracts lost by pulling out of a key navigation system that the UK helped build and finance - ironically just at the point when it becomes operational. However, for some in the UK's space industry, the chance to develop a GNSS system from scratch, may be a case of a glass half full. The UK space industry has seen its capabilities stretch from satellites, to ion engines, to human spaceflight training, rovers and, soon, launchers and spaceports. What better way to unleash this potential than with a UK GNSS system? How the UK would fund such a prestige space project is unclear, but there might be a wider opportunity here for the UK to forge ahead with the next revolution in navigation - quantum compasses. With a blank slate to create a precision navigation system from scratch - could the UK spearhead this technology ahead of the rest of the world? This course of action, to leapfrog GNSS and go directly to quantum compass technology, brings its own risks and is also likely to be expensive. However, the alternative may be to spend millions developing a bespoke UK satnav system, only to find that when it enters service in 10-15 years, the rest of the world may have moved on to quantum compasses and GPS/GNSS has become a niche system like LORAL. There are no easy answers here - especially for the UK with its strained public finances. However, these two options do offer exciting opportunities. Having (as some might argue) leapt into the dark with Brexit, is the UK willing to take a leap of faith in quantum?
机译：英国从伽利略卫星导航系统的出口是半满还是半满的玻璃杯？通过撤出英国帮助建造和融资的关键导航系统，讽刺的是，恰好在它投入运营的那一刻，人们可以为12亿英镑的沉没成本和未来的合同损失而感到be惜。但是，对于英国航天业中的某些人来说，从头开始开发GNSS系统的机会可能是半满的情况。英国航天工业的能力已从卫星延伸到离子引擎，再到人类航天训练，漫游车，以及不久的发射器和太空港。有什么比英国GNSS系统更好的释放这种潜力的方法？英国如何为这样的声望太空项目提供资金尚不清楚，但英国可能有更大的机会推进下一轮导航革命-量子罗盘。一块空白的板块可以从头开始创建精密的导航系统-英国能否率先将该技术领先于世界其他地区？跳过GNSS并直接使用量子罗盘技术的这一做法会带来自身的风险，而且可能也很昂贵。然而，另一种选择可能是花费数百万美元开发定制的英国卫星导航系统，却发现当它在10到15年内投入使用时，世界其他地区可能已经转向量子罗盘，而GPS / GNSS已成为利基市场像LORAL这样的系统。这里没有简单的答案-特别是对于公共财政紧张的英国。但是，这两个选项确实提供了令人兴奋的机会。随着英国退欧（也许有人会争论到黑暗中），英国是否愿意对量子技术抱有信心？

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