QUOTE (sinowarrior @ Oct 18 2009, 01:20 PM)

you working in commercial DRAM & you have no clue on Chinese missile system.
And what do
YOU do for a living that give you those clues that enable to speak with authority on Chinese weaponry?
QUOTE (sinowarrior @ Oct 18 2009, 01:20 PM)

http://www.smics.com/website/enVersion/Hom.../index_1024.jspvalidated 40nm for customers. I bet your company's current process is no more advanced than that.
shanghai's AMEC is selling 12 inches 45nm equipments , TSMC and UMC have purchased from them.
http://www.amec-inc.com/technology/ We are currently volume production (FLASH) at 34nm. Samples of 32nm and lower have been across my desk.
QUOTE (popeye @ Oct 18 2009, 09:16 PM)

The Author of that Article is NOT citing a US Govt official . The Author IS the former Assistant Secretary of Defense IN PERSON , I'm sure he is more informed than you.
I was speaking in general terms. I am saying that if
YOU are going to support any claims made by anyone, bring on the data, journalists' opinions do not count.
QUOTE (popeye @ Oct 18 2009, 09:16 PM)

(are the yanks so dumb they can't read simple English ? LOL ).
Is this a jab at white Americans? How do you I am white? Guess it is acceptable for Chinese members to make gratuitous thinly veiled racist comments but not vice versa.
QUOTE (popeye @ Oct 18 2009, 09:16 PM)

There exist credible technical explanation as to how the DF-21 initiates its targeting system ( a combination of Elint satellites - akin to USN's White Cloud Spaceborne System, Ziyuan and Yaogan series of satellites that have EO, CCD and SAR sensors & OTH Radar ), but then again , most of that stuff is classified , so you may not have full access to it.
Ah...So trot out the standard 'classified' line even when faced with the most basic challenge as to the technical and operational feasibility of this claim. You are confused between the modes of Search, Track and Targeting. Everything you posted involve Search. Satellites eventually move out of the target's location. Over-the-horizon radars with their HF freqs have poor target resolutions, if any are detected. Poor target resolutions because of meters length freqs are not new to radar engineers. At best, OtH radars can only offer a guesstimate of the target's location and speed. But it is better than nothing, which is why even US have OtH radars deployed. To actually Track and finally Targeting belongs to the warhead itself and so far there is nothing technically credible presented as to how this is accomplished against a moving target.
QUOTE (popeye @ Oct 18 2009, 09:16 PM)

But as an Assistant Secretary of Defense, I'm sure the Author has full security clearance & access to classified data , hence his article .
When Brookes left government service, his security clearance is revoked. Standard procedures. He speaks from experience and retained knowledges and should be respected. However, it is no substitute for genuine technical information, which the article has none.
QUOTE (popeye @ Oct 18 2009, 09:16 PM)

Of course you can choose to disbelieve it & avoid the facts ...even if it originates from a Assistant Secretary of Defense IN PERSON ...
The reason why Brookes presented no technical information in his article is because that was not his intention, which was to present a 'worst case' scenario. As someone who has experience in weapons field testing, I am going to give you a small sample of the technical issues involved.
http://www.fas.org/man/dod-101/sys/land/m712.htmQUOTE
The M712 Copperhead projectile was the first smart artillery round ever developed.
The system was employed during Operation Desert Storm...
The nose of the projectile houses a laser seeker in a plastic cone.
The control section includes the fins and wings that deploy in flight and allow the round limited maneuverability.
At 20 seconds from impact, the laser designator operator begins designating the target.
The ground surface area in which the round can maneuver is limited. The optimum limits of maneuverability of the Copperhead round is called a footprint. The size of the footprint is determined by the range and the shape of the trajectory, but it can also be affected by cloud height. The ballistic aimpoint is usually short of the target location sent by the laser designator operator. The distance that the ballistic aimpoint is short of the target location varies and is called the offset correction. This offset distance is used to ensure that the maximum probability of hit occurs at the original target location sent by the observer. The larger the target location error, the lower the probability of hitting the target.
This '20 seconds' time span is for a much shorter distance in this ballistic delivery and still some form of guidance/correction is required
IF there is a desire to increase the odds of success. Notice the comment --
...probability of hitting the target. That is not a guarantee of success, only odds of hitting the ground target.
http://www.accessmylibrary.com/article-1G1...utoloading.htmlQUOTE
Extended range will be catered for by firing standard enhanced range Nato projectiles, including the still developmental XM987 Excalibur providing a range of over 40,000 metres from a 39-calibre barrel. Some form of in-flight trajectory correction system will probably become involved.
Forty thousands meters = 40km.
Artillery is about ballistic trajectories. At 40km and there is a need to have some form of course correction mechanism against fixed targets. Simple aerodynamics can induce lateral acceleration upon the descending warhead, hence the need for course correction -- at 40km distance between launch and target location. Now not only does the DF-21's warhead must have some form of course correction for its own errors, it must be able to compensate for target's movement, which is also a form of course correction. Obvious enough -- if the target move, each new coordinate rendered the original location an 'error' and must be eliminated. And this is over several hundreds km or even over one thousand km in distance between launch point and target.
Inertia -- the resistance to changes in motion and the resistance is proportional to mass. So if there is a need to have the body responsive to lateral acceleration, preferably self-induced, the question is what should be the body's mass that would maintain a stable course, responsive to command lateral acceleration but resistive to aerodynamics that is always present. Less overall mass equal to less explosive load. Speed inversely affect response time but the warhead is not in control of its own descend velocity. It can only slow down but not speed up. Slower descent speed allow increased response time to compensate for target location changes but also make the warhead vulnerable to countermeasures, whatever they might be.
So if the warhead is supposed to be maneuverable, what is that method of inducing lateral acceleration?
http://www.aerospaceweb.org/question/weapons/q0158.shtmlEven though a ballistic warhead cannot maneuver like an air-air missile, the fact that it is an atmospheric body subject it to the same aerodynamics limitations as the air-air missile. So what is that method of inducing lateral acceleration to compensate for the ship's movement? Aerodynamic means such as fins or commanded reaction thrusts, aka jet ports on the sides of the body?
Do you really think that just because the Chinese government make a claim, that claim cannot be credibly challenged?