China tests ASAT

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Sea Dog

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I have little doubt about Sea Dog's claim that he works in space industry. His statement contains the clear mistakes:

"I know we can put a launch vehicle within 1 meter of dilution threshhold."

This is damn wrong. Today's sat orbit precision control is measured in "km", not "m", let alone "1 meter". A few km of error is quite normal and nobody can achieve a meter's precision, although tracking is well under 1m threadhold.

"The USA and Russia both have been able to do this for a long time."

What "this" means? 1 meter precision for orbit control? None of them can achieve that in a open loop orbit control way. If you can do that in the open loop control, you don't need any homing device on the KV, the ground can control everything then, but it's not the reality.

"This accuracy is demonstrated monthly in commercial space applications."

Also it's wrong. No commercial space sat can achieve 1 meter's orbit precision at this time.

I'm done with this topic now. But you sir, don't know anything. I don't even think you understand what I was talking about. What programs have you worked on? The way you talk about open loop orbit control, we don't even use that terminology. Do you know how thruster efficiencies are calculated? What's the significance of satellite dry mass? Anyway, see ya'. I personally don't care if you believe me or not.
 

fishhead

Banned Idiot
I'm done with this topic now. But you sir, don't know anything. I don't even think you understand what I was talking about. What programs have you worked on? The way you talk about open loop orbit control, we don't even use that terminology. Do you know how thruster efficiencies are calculated? What's the significance of satellite dry mass? Anyway, see ya'. I personally don't care if you believe me or not.

Sir, my job title includes a word called "aerospace", and I am not just sitting in the office to do some paper work. Part of my duty is to review the proposals and give a "pass" or not. If you don't understand the concept of "close loop control", then just drop this topic.
 

fishhead

Banned Idiot
This article is very interesting. It's not a "prediction", but a blunt warning. Human beings are at the corssroad of the history.

Senior Chinese officer predicts weapons will be deployed in space

DAVOS, Switzerland – A senior Chinese military officer predicts that weapons will be deployed in outer space despite the government's long-standing desire to prevent an arms race in space.

Yao Yunzhu, a senior colonel in the People's Liberation Army, brought up China's recent successful test of an anti-satellite weapon during a World Economic Forum dinner Thursday focusing on North Korea.

“My wish is we really want to keep space as a peaceful place for human beings,” she said, adding that China would like all countries to come to a consensus that space should be used only for peaceful purposes.

“But personally, I'm pessimistic about it,” said Yao, 52, who directs the Asia-Pacific Office at the Academy of Military Science in Beijing. “My prediction: Outer space is going to be weaponized in our lifetime.”

Yao's remarks were the first time a member of the Chinese military has commented on the test. The only other official comment, from the Foreign Ministry, offered the barest confirmation and repeated stock positions about China's wish to keep space free of weapons.

The Jan. 11 test sparked criticism from the United States and Japan, and raised concerns over the rising militarization of space. Analysts said it also represented an indirect threat to U.S. efforts to remain predominant in space and on the ground – because it raised the possibility that the network of U.S. spy satellites could be shot down.

The U.S. military has had the capability to shoot down satellites since the 1980s. Russia has a similar capacity, and now China is the third potential military power in space.

China confirmed the test on Tuesday, but did not provide details – and neither did Yao. The magazine Aviation Week, which first reported the test, said the satellite was hit by a kinetic kill vehicle launched from a ballistic missile.

China's long-standing policy was to ban weapons in space, Yao said, noting that Russia and China presented a draft outline for a treaty to prevent the deployment of weapons in space to the Conference on Disarmament in Geneva in June 2002.

The United States objected at the time, saying the 1967 Outer Space Treaty provided sufficient guarantees against the weaponization of space. The Russians countered that while the 1967 treaty banned weapons of mass destruction in space, it did not contain any legal barriers to putting other weapons in orbit around the Earth.

Without naming any country, but in an apparent reference to the United States, Yao said if there's going to be “a space superpower, it's not going to be alone, and China is not going to be the only one.”

“It will have company,” she said.

Her rank of senior colonel is equivalent to that of a brigadier or one-star general in the U.S. military. She belongs to a small group of fluent English speakers the usually secretive People's Liberation Army uses to deal with foreigners.

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Sea Dog

Junior Member
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Sir, my job title includes a word called "aerospace", and I am not just sitting in the office to do some paper work. Part of my duty is to review the proposals and give a "pass" or not. If you don't understand the concept of "close loop control", then just drop this topic.


The concept of closed/open loop configurations? You've got to be kidding me. That's basic 1st year stuff. We apply open and closed loop configurations into our GPS calcs/ onboard process time, but the teminology is not used in our attitude control. Sorry, you may have the word "aerospace" in your title, but I don't believe it's space industry related. Are you in the USA just out of curiousity?
 

bd popeye

The Last Jedi
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Do to the present no productive tone of this thread>>> This thread is closed.

bd popeye super moderator
 
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