Certainly, microwaves would work: a test carried out in 2008 transmitted useful amounts ofmicrowave energy between two Hawaiian islands 148km apart, so penetrating the 100kmof the atmosphere would be a doddle.
当然,微波可以发挥作用:2008年进行的一项测试为相距148公里的夏威夷两岛传送了大量的微波能,所以穿越100公里的大气层应该易如反掌。
But microwaves spread out as they propagate.
但微波在传送过程中会扩散。
A collector on Earth that was picking up power from a geostationary satellite orbiting at analtitude of 35,800km would need to be spread over hundreds of square metres.
接收35,800公里外的地球同步卫星传送的能源所需的地面收集器需覆盖数百平方米。
Using a laser means the collector need be only tens of square metres in area.
而使用激光器则意味着收集器面积仅需达到几十平米。
Dr Sweeney s team, working in collaboration with Astrium,
斯维尼博士的团队正与卫星和太空公司Astrium合作。
a satellite-and-space company that is part of EADS, a European aerospace group, will test thesystem in a large aircraft hangar in Germany.
Astrium隶属于欧洲一航天集团欧洲宇航防务集团。斯维尼博士的团队将在德国一座大型飞机库测试该系统。
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