US defence giant Lockheed Martin has struck a deal with an Australian technology firm to track space debris1 that can damage satellites.
Most space debris is man-made and nete from destroyed satellites
It has signed a "strategic co-operation agreement" with Canberra-based Electro Optic Systems (EOS) to build a new tracking station in Western Australia. The site will employ advanced optical and laser technology to detect, track and identify specific space objects. Debris threatens orbiting satellites daily and can cause millions in damage. "Ground-based space situational awareness2 is a growing priority for government and netmercial organisations around the world that need to protect their investments in space," said Lockheed Martin Space Systems executive vice3 president Rick Ambrose in a statement. "We'll offer customers a clearer picture of the objects that could endanger their satellites, and do so with great precision and cost-effectiveness." There are nearly 2,000 netmercial and government satellites orbiting the Earth. However, they face up to 200 threats a day from debris as small as a fingernail given they are travelling at speeds of about 17,500 miles an hour. It is estimated that there are 300,000 pieces of space junk ranging from one-centimetre to the size of bowling4 balls, and that on average one satellite is destroyed each year. EOS chief executive Dr Ben Greene says that they have invested 80m Australian dollars ($74,6m) into developing their light-based technology systems, which have benete cheaper than the use of radar5. Currently, mostly radar-based systems are being used to track space junk, such as the US Air Force's Space Fence. It can follow as many as 200,000 objects in space. EOS is one of the largest makers6 of major optical telescopes in the world. They also operate Australia's Space Research Centre at Mount Stromlo.
1 debris n.瓦砾堆,废墟,碎片 参考例句:
After the bombing there was a lot of debris everywhere.轰炸之后到处瓦砾成堆。
Bacteria sticks to food debris in the teeth,causing decay.细菌附着在牙缝中的食物残渣上,导致蛀牙。
2 awareness n.意识,觉悟,懂事,明智 参考例句:
There is a general awareness that smoking is harmful.人们普遍认识到吸烟有害健康。
Environmental awareness has increased over the years.这些年来人们的环境意识增强了。
3 vice n.坏事;恶习;[pl.]台钳,老虎钳;adj.副的 参考例句:
He guarded himself against vice.他避免染上坏习惯。
They are sunk in the depth of vice.他们堕入了罪恶的深渊。
4 bowling n.保龄球运动 参考例句:
Bowling is a popular sport with young and old.保龄球是老少都爱的运动。
Which sport do you 1ike most,golf or bowling?你最喜欢什么运动,高尔夫还是保龄球?
5 radar n.雷达,无线电探测器 参考例句:
They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。
6 makers n.制造者,制造商(maker的复数形式) 参考例句:
The makers of the product assured us that there had been no sacrifice of quality. 这一产品的制造商向我们保证说他们没有牺牲质量。
The makers are about to launch out a new product. 制造商们马上要生产一种新产品。 来自《简明英汉词典》