-
(单词翻译:双击或拖选)
Satellite industry
Stars in their eyes
As the Rosetta mission shows, Britain is getting it right in space
IN A clean room at the Airbus Defence & Space (ADS) factory north of London, scientists are working on LISAPathfinder (pictured), a hexagon-shaped satellite due to be launched next year. The aim of the ambitious space mission is to try, for the first time, to find and measure gravitational waves—ripples in space-time predicted by Einstein's general theory of relativity. If that's possible, earthlings would have further evidence that the theory is true, and they should also, eventually, be able to locate black holes more accurately1.
To do all that, however, LISA first has to get to a “Lagrange point”, a place where spacecraft can float stably while getting no farther from the earth. This is essential for detecting the gravitational waves. The only force that could then ruffle2 LISA would be solar wind, explains Justin Byrne, a deputy director of ADS. Solar wind is so light, however, that developing thrusters soft and accurate enough to counteract3 it has been “the trickiest4 bit of all”. It would take 1,000 of the thrusters developed for LISA to lift a single piece of paper; LISA has just four.
This is the kind of technological5 achievement that has made Britain a leader in satellite design and construction. This week ADS was celebrating the European Space Agency's Rosetta mission to comet 67P/Churyumov-Gerasimenko. The probe, Philae, that landed on the comet, was assembled largely in Germany. But Rosetta itself was, for the most part, constructed in the same clean room where LISA is being built; Mr Byrne himself was one of the designers of Rosetta when the mission was first conceived about 20 years ago. Altogether ten British companies were involved in the Rosetta mission, making up 20% of the contractors6 used among 14 European countries. Some of the fancy kit7 on Philae was British, such as the miniature laboratory built at the Rutherford Appleton laboratory near Oxford8 to a design from the Open University.
This outsized contribution to the Rosetta mission is now typical of Britain's place in the firmament9 of satellite construction. About one-quarter of the world's commercial communication satellites are built in Britain and 40% of the world's small satellites. Most of those are built by Airbus's Surrey Satellite Technology Limited (SSTL), the world leader in the field. It has launched 43 satellites since it was started by an academic at Surrey University, Sir Martin Sweeting. The whole space sector10 directly employs 35,000 people, and the supply-chain accounts for thousands more jobs. London-based Inmarsat is one of the world's largest satellite operators, specialising in mobile telephony. The space sector has a turnover11 of about £11 billion a year.
Things have not always been so rosy12. The ADS plant in Stevenage has itself been a graveyard13 for Britain's ambitions in air and space. Originally owned by De Havilland, an aircraft company, it was here during the 1950s that parts for the Comet, the world's first passenger jet, were made. The Blue Streak14 missile was also built here. Several fatal crashes, however, ended production of the Comet and, with it, Britain's lead in commercial airliners15. Blue Streak was cancelled due to spiralling costs, effectively ending the country's interest in launching rockets.
These were disasters at the time, but in retrospect17 also rather fortuitous. Britain's space industry was consequently forced to look at small-scale projects and to survive on tight budgets, unlike America's. It also made the British more commercially minded in financing the industry.
The satellite maker18 SSTL, for example, argues one of its directors, Andrew Bradford, is largely about “changing the economics of space”. It has virtually invented the niche19 market for less expensive, smaller satellites, selling a lot to developing countries. And it works on science missions like Rosetta. Mr Byrne also argues that ADS has been successful partly because it has a good commercial business, making big satellites for customers like BSkyB, a broadcaster. The innovative20 technology developed for the government-funded science projects like Rosetta is transferable to business, maximising the return on the intellectual investment. For now, it looks like a stellar formula.
1 accurately | |
adv.准确地,精确地 | |
参考例句: |
|
|
2 ruffle | |
v.弄皱,弄乱;激怒,扰乱;n.褶裥饰边 | |
参考例句: |
|
|
3 counteract | |
vt.对…起反作用,对抗,抵消 | |
参考例句: |
|
|
4 trickiest | |
adj.狡猾的( tricky的最高级 );(形势、工作等)复杂的;机警的;微妙的 | |
参考例句: |
|
|
5 technological | |
adj.技术的;工艺的 | |
参考例句: |
|
|
6 contractors | |
n.(建筑、监造中的)承包人( contractor的名词复数 ) | |
参考例句: |
|
|
7 kit | |
n.用具包,成套工具;随身携带物 | |
参考例句: |
|
|
8 Oxford | |
n.牛津(英国城市) | |
参考例句: |
|
|
9 firmament | |
n.苍穹;最高层 | |
参考例句: |
|
|
10 sector | |
n.部门,部分;防御地段,防区;扇形 | |
参考例句: |
|
|
11 turnover | |
n.人员流动率,人事变动率;营业额,成交量 | |
参考例句: |
|
|
12 rosy | |
adj.美好的,乐观的,玫瑰色的 | |
参考例句: |
|
|
13 graveyard | |
n.坟场 | |
参考例句: |
|
|
14 streak | |
n.条理,斑纹,倾向,少许,痕迹;v.加条纹,变成条纹,奔驰,快速移动 | |
参考例句: |
|
|
15 airliners | |
n.客机,班机( airliner的名词复数 ) | |
参考例句: |
|
|
16 lining | |
n.衬里,衬料 | |
参考例句: |
|
|
17 retrospect | |
n.回顾,追溯;v.回顾,回想,追溯 | |
参考例句: |
|
|
18 maker | |
n.制造者,制造商 | |
参考例句: |
|
|
19 niche | |
n.壁龛;合适的职务(环境、位置等) | |
参考例句: |
|
|
20 innovative | |
adj.革新的,新颖的,富有革新精神的 | |
参考例句: |
|
|