中国高功率激光可以攻击美国间谍卫星

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中国高功率激光可以攻击美国间谍卫星

China has fired high-power lasers at U.S. spy satellites flying over its territory in what experts see as a test of Chinese ability to blind the spacecraft, according to sources.TNTJX1H
It remains unclear how many times the ground-based laser was tested against U.S. spacecraft or whether it was successful.`-F'uS(j)w.z
But the combination of China’s efforts and advances in Russian satellite jamming capabilities illustrate vulnerabilities to the U.S. space network are at the core of U.S. Air Force plans to develop new space architectures and highly classified systems, according to sources.
According to experts, lasers — depending on their power level — could blind electro-optical satellites like the giant Keyhole spacecraft or even interfere with radar satellites like the Lacrosse. Blinding, one source said, is different than disabling given the enormous power required to shoot a laser through the dense lower atmosphere and reach a fast-moving satellite in space. The hardware on the spacecraft can’t be changed given they’re in orbit, but software changes can help them weather disruptive attacks.半导体技术天地[Semiconductor Technology World]W.V0b4Fd
Russian jamming systems are publicly known — the Air Force destroyed such a system deployed to Iraq to keep American GPS guided bombs from finding their targets during the 2003. The site was destroyed by GPS guided bombs.www.2ic.cn dj-_s^S
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Pentagon officials, however, have kept quiet regarding China’s efforts as part of a Bush administration policy to keep from angering Beijing, which is a leading U.S. trading partner and seen as key to dealing with onerous states like North Korea and Iran.www.2ic.cn(~$B:A%h9fi_q
Even the Pentagon’s recent China report failed to mention Beijing’s efforts to blind U.S. reconnaissance satellites. Rather, after a contentious debate, the White House directed the Pentagon to limit its concern to one line. In that one line, the report merely acknowledges China has the ability to blind U.S. satellites, thanks to a powerful ground-based laser capable of firing a beam of light at an optical reconnaissance satellite to keep it from taking pictures as it passes overhead.
According to top officials, however, China not only has the capability, but has exercised it. It is not clear when China first used lasers to attack American satellites. Sources would only say that there have been several tests over the past several years.
“The Chinese are very strategically minded and are extremely active in this arena,” said one senior former Pentagon official. “They really believe all the stuff written in the 1980s about the high frontier and are looking at symmetrical and asymmetrical means to offset American dominance in space.”芯片,设计,版图,晶圆制造,工艺,制程,封装,测试,wafer,chip,ic,design,fabrication,process,layout,package,test,FA,RA,QA[ t7SHGK
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China’s burgeoning anti-satellite capabilities are further evidence of Beijing’s focused military strategy that aims not to engage the United States in direct confrontation, but through asymmetric means, according to Andrew Krepinevich of the Center for Strategic and Budgetary Assessments in Washington. $dW3{
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Krepinevich points out that China has outlined a set of capabilities it refers to as “Assassins Mace” to keep U.S. forces in the region at risk and away from China’s borders, and tailored to undermine each U.S. advantage from submarine to satellite capabilities. ax.A ZSm
For their part, service officials are not expressing alarm at efforts to counter the U.S. space advantage, explaining that such moves are predictable and understandable. But they are taking it seriously enough to test ground-based lasers against their own spacecraft to determine their efficacy and map space architectures that are resilient enough to resist such attacks.
The problem, according to sources, is that current satellites are large, on predictable orbits that are easy to track and have scant defenses against lasers.芯片,设计,版图,晶圆制造,工艺,制程,封装,测试,wafer,chip,ic,design,fabrication,process,layout,package,test,FA,RA,QA/|L
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The United States operates three large optical reconnaissance satellites of the Keyhole-series by Lockheed Martin that were introduced some three decades ago. The loss of any of the three would prove a blow to U.S. space capabilities, sources said, which is why they will be replaced by a large constellation of spacecraft under the Future Imagery Architecture program by Boeing and Lockheed.3^
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Top officials, among them Air Force Secretary Michael Wynne, flatly declined to comment on whether China has attempted to blind its satellites. Chinese officials could not be reached for comment at press time./k6qaG }#LL`.qC
Wynne did, however, acknowledge that the Air Force’s space plans are shaped recognizing that potential foes will seek asymmetric means to harm a U.S. space network that gives the American military an enormous edge.www.2ic.cn
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The goal, Wynne said, is to minimize the impact that real-life attacks would have on U.S. space capabilities through a networked architecture that can lose nodes but keep functioning.
Wynne stressed that what’s at stake isn’t merely U.S. military superiority, but the fate of global commerce because signals from Air Force GPS satellites are critical to everything from airline and maritime commerce to car navigation systems.
And unlike the 1980’s threat from Soviet anti-satellite plans, future space attacks will be limited in scope, Wynne said.t4JgyKJb K
“At the time, the Soviets were always talking about a bald-faced assault,” he said. Future “asymmetric attacks are going to be local to try to mask out our capabilities in one region. The trick to winning asymmetrical warfare is to make it irrelevant.”
He said a new generation of GPS 3 satellite “will make further assaults and jamming efforts irrelevant.”半导体技术天地[Semiconductor Technology World] G%K%E        @E-Q5S
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Doing “space and ISR through very different means … means asking good questions,” he said. “Do 22,200-mile-high orbits make sense? Does an orbital periodicity that is well known to any adversary have any relevance today? What you really want is assured situational awareness, position location and communications capabilities.”Nk%jVTOp2P
But analysts, executives and even officials within the Pentagon have criticized the Air Force, arguing that the service is talking a good game but falling short on execution — largely for lack of budget.5J#jZi8e5b+nI)o5o
One veteran space industry executive expressed shock at how limited the debate has been to better secure U.S. spacecraft, given the evidence that nations are investing in systems to blind American leaders in a future crisis.芯片,设计,版图,芯片制造,工艺,制程,封装,测试,wafer,chip,ic,process,layout,package,FA,QAIX7I}1B
The reason, executives and analysts said, is that such safeguards are complicated and expensive, and become targets when programs go over budget or fall behind schedule.半导体技术天地[Semiconductor Technology World]F1t6kq u.E.C
Case in point? One source said the Pentagon is so thirsty for more bandwidth to handle burgeoning communications demands that it has been short-changing security, which consumes bandwidth.芯片,设计,版图,晶圆制造,工艺,制程,封装,测试,wafer,chip,ic,design,fabrication,process,layout,package,test,FA,RA,QA*Y"|$t6O9R*@ mH
“It’s a tradeoff,” said one industry source. “And so far, the pressure has been for capacity over security.”
According to analyst Loren Thompson of the Lexington Institute, the Air Force is making poor investment choices not only in space, but ISR programs.s1}?4AQ/H ZwyrV
“The U.S. Air Force’s ambitious plan for fielding orbital and airborne reconnaissance systems has begun to come unhinged in the budget process from Space Radar, to missile warning to future radar planes, the whole mission area seems to be melting down,” Thompson said.芯片,设计,版图,芯片制造,工艺,制程,封装,测试,wafer,chip,ic,process,layout,package,FA,QA~JU4N[\/]7q!C5z
Wynne contends that space programs are merely in the process of being restructured to rein in cost increases and schedule slips. Wynne also argues that the F-22 fighter’s powerful radar and electronic capabilities allow it to perform the roles of larger existing aircraft like the Joint Surveillance Target Attack Radar System, the Airborne Warning and Control System and the Rivet Joint, allowing the service to forgo investment in aircraft that are vulnerable to a new generation of powerful surface-to-air missiles.
“I’m probably the biggest supporter of the F-22 outside the Air Force, and while it’s the best fighter ever and can do these jobs, but not as well as dedicated assets that have the ability to stay on station far longer,” Thompson said. “Osama bin Laden is still at large and there are known vulnerabilities to our space systems. In this environment, it’s odd that the Air Force is cutting its orbital, manned and unmanned reconnaissance assets while presenting the F-22 as a reconnaissance platform. The point is, where are we deficient, firepower or finding the enemy?”www.2ic.cn.l_&e7Eln
As for China specifically, Thompson said the country has a right to defend itself. 芯片,设计,版图,晶圆制造,工艺,制程,封装,测试,wafer,chip,ic,design,fabrication,process,layout,package,test,FA,RA,QA%k6QQ!wJ
“If you keep looking over the fence at you neighbor’s back yard, you’re going to get poked in the eye, so it’s not surprising that China might be worried about U.S. forces stationed on their doorstep,” Thompson said. “They don’t like it and are figuring out how to poke us in the eye. Now I’m no great admirer of the Chinese leadership, but how would we feel if the Chinese had their aircraft carriers off Long Island. That’s why we have to do a better job of protecting ourselves and I’m afraid that’s not what we’re doing.”www.2ic.cn!X iW.V8m%Edl)~
The former Pentagon official put it more bluntly.
“The Air Force is trying to put a happy face on this,” he said. “It’s not that they don’t know what do. It’s that they don’t have the money in their space budget. It’s that simple.”r!Q*P#u&qSQZ
Another factor is the sheer complexity of building satellites that has fueled cost overruns and schedule delays. For example, the Air Force originally envisioned the National Polar Orbiting Environmental Observation Satellite as a powerful new climate spacecraft. But departments across the government added their unique payloads to the spacecraft, causing integration challenges and cost growth.
The same happens on classified spacecraft as intelligence agencies pile on payloads. Then there is the challenge of ensuring that the technology that is on the spacecraft is the best possible given it will be in orbit for a decade or more.
“Unlike an airplane, once you launch something into space you can’t upgrade it again, so when it comes to technology, you are often reworking your system to get the best available in there because you know that it’s going to be around for a long time once it’s in orbit,” the former official said. “So when people talk about cost, that’s a piece of it. It’s even harder when you’re trying to protect yourself against threats over the next 50 years.”