S-300MPU and S-300 V videos!!!

[crazyinsane105]

I never knew that the S-300's were that fast!!!

http://*********************.com/index.php?showtopic=49355&st=0&p=689624&#entry689624

[Liberator]

KOOL! IM the first 1 who watched it!

[Red not Dead]

KOOL! IM the first 1 who watched it!


Well actually you're not...a whle bunch of soviet made missiles and hard ware is to be watched at the rossoboron site. Rusarm...

[Red not Dead]

I never knew that the S-300's were that fast!!!

http://*********************.com/index.php?showtopic=49355&st=0&p=689624&#entry689624


maybe because everyone is sooooooooooooooo hypnotized by US badged stuff.

Anyway the S400 are supposed to go faster (mach 5.5 mid range)

[Liberator]

Well actually you're not...a whle bunch of soviet made missiles and hard ware is to be watched at the rossoboron site. Rusarm...

Im no dumb man, u better learn about how to use a forum properly.

The world "I saw it first". Basically means that I am the first 1 who replied with watching it over again 2 times with a Thumbs up.

[MIGleader]

the s-300 missles seiries system is a very capable air-defence missle, better than early patriots. it defeated the patriot in the uae competition.

[tphuang]

I wouldn't go that far. It depends on which patriot series you compare it to. S-300 series also lost out to the patriot missile for the south korean market.

[MIGleader]

patriot is over rated. at least its early abilities. why did sk pick patriot? its a u.s buddy/slave.

[tphuang]

patriot is over rated. at least its early abilities. why did sk pick patriot? its a u.s buddy/slave.
yeah, that's true, but I wouldn't say for sure S-300 is better. I personally think S-300PMU/PMU2 and other variants have the entire pacific coast of China covered.

[Red not Dead]

yeah, that's true, but I wouldn't say for sure S-300 is better. I personally think S-300PMU/PMU2 and other variants have the entire pacific coast of China covered.

Well PAC3 lost the greek bidding contest (while having a less elaborated test that the russkis). And hadn't it been for the US political pressure on greek government they would have never turned away from such a system.

Let alone the pathetic score sheet PAC2 had against 35 yr old SCUD (SS1/2:D )

I mean patriot is good for the show and chest thumping but the S series are heavy duty hunters.

[tphuang]

Well PAC3 lost the greek bidding contest (while having a less elaborated test that the russkis). And hadn't it been for the US political pressure on greek government they would have never turned away from such a system.

Let alone the pathetic score sheet PAC2 had against 35 yr old SCUD (SS1/2:D )

I mean patriot is good for the show and chest thumping but the S series are heavy duty hunters.
that was pretty pathetic, lol. I do think patriot missiles are the most overrated system in the world.

[BrotherofSnake]

The S-300 is quite impressive.:)
Let alone the pathetic score sheet PAC2 had against 35 yr old SCUD
The Patriot was the first air defense system in the world to successfully intercept a theater ballistic missile.

[MIGleader]

so? ballistic missles are slow and easy to detect. not ot meantion they arnt use anymore.

[ger_mark]

on sinodefence is written the s-300 has a 90% hitchance against an aircraft, i wonder whats its chance of firsthit if the plane starts mooving, patriot can even take down smaller missiles, but however in a few years it will be replaced with meads

[tphuang]

The S-300 is quite impressive.:)

The Patriot was the first air defense system in the world to successfully intercept a theater ballistic missile.
no, it claimed to have successfully intercepted the Scud missile, but it really didn't.

[BrotherofSnake]

The first combat use of Patriot occurred 18 January 1991 when it successfully intercepted and destroyed an Iraqi Scud missile fired at Saudi Arabia.

http://en.wikipedia.org/wiki/MIM-104_Patriot#Usage_during_the_1991_Gulf_War

[tphuang]

The first combat use of Patriot occurred 18 January 1991 when it successfully intercepted and destroyed an Iraqi Scud missile fired at Saudi Arabia.

http://en.wikipedia.org/wiki/MIM-104_Patriot#Usage_during_the_1991_Gulf_War
that's what the perception is, but a report by Ted Koppel and a senate enquiry showed that the Patriot missile actually didn't do that well. The reason for the mistake is this:
Patriot missile counts a sucess as exploding in the vicinity of where it thinks the opposing missile will be. However, that wasn't the case with the Scud, so it's success % is not a real measuring stick. I think if you remember watching it on TV, how the American general Norman Schwartz (I think) was looking at a video of patriot vs scud and saying:
it hit the scud here and here and here and....
Now, the interesting part is that there was only one scud and it kept on going even after the patriot missile stopped firing. That's why Israel was hit so many times.

[MIGleader]

The first combat use of Patriot occurred 18 January 1991 when it successfully intercepted and destroyed an Iraqi Scud missile fired at Saudi Arabia.

http://en.wikipedia.org/wiki/MIM-104_Patriot#Usage_during_the_1991_Gulf_War

the ealry patriot was a piece of crap. they fire em in slavos of four to try to guarentee a hit. but still many scuds aliped through. the early patriots were purly for israeli comfort.

[tphuang]

the ealry patriot was a piece of crap. they fire em in slavos of four to try to guarentee a hit. but still many scuds aliped through. the early patriots were purly for israeli comfort.
they weren't feeling so comfortable when they got hit by the scuds though.

[PiSigma]

the early patriots suck due to an numerical error in its calculations:

" A report of the General Accounting office, GAO/IMTEC-92-26, entitled Patriot Missile Defense: Software Problem Led to System Failure at Dhahran, Saudi Arabia reported on the cause of the failure. The Patriot missile failures in Desert Storm were due to roundoff error because the system was designed to be on alert for only a few minutes at a time. Instead, they ran continuously for days. The clock, which was storing time in floating-point, began to have too many digits to the left of the decimal place and not enough after the decimal place to do accurate timings of incoming SCUD velocities."

now don't all of you just want to take Numerical Methods for Engineering??

[tphuang]

the early patriots suck due to an numerical error in its calculations:

" A report of the General Accounting office, GAO/IMTEC-92-26, entitled Patriot Missile Defense: Software Problem Led to System Failure at Dhahran, Saudi Arabia reported on the cause of the failure. The Patriot missile failures in Desert Storm were due to roundoff error because the system was designed to be on alert for only a few minutes at a time. Instead, they ran continuously for days. The clock, which was storing time in floating-point, began to have too many digits to the left of the decimal place and not enough after the decimal place to do accurate timings of incoming SCUD velocities."

now don't all of you just want to take Numerical Methods for Engineering??
This is the most documented one. It's actually taught in every Software Engineering class. In reality, most of PMD encounters with Scud actually went according to the plan. The only problem is that PMD did not destroy the scud.

[PiSigma]

hey tphuang, are you a comp E??? there doesn't seem to be too many engineers in this forum... we had a bonus project for my numerical methods class to correct the error found in patiot, of course, not use the actual code they had, but something my prof made, wow, that was a barrel of fun. just thinking about it make me want to cry, but i needed the marks.

[tphuang]

I'm actually a Software Engineer, that's why I got interested in the Patriot missile and control software of planes. The particular incident you listed is really quite an extraordinary circumstance. It tells me that the people who were designing this software really had no idea of how numbers are stored. Anyone with a half brain can figure out that it's dangerous trying to accumulate fractions that can't be represented exactly by the computer hardware.

[AssassinsMace]

The S-300 is quite impressive.:)

The Patriot was the first air defense system in the world to successfully intercept a theater ballistic missile.

Too bad the Patriot can't shoot down an obsolete Seersucker that hit Kuwait City getting past AWACS, Aegis, and Patriot sensors without being seen.

[Red not Dead]

Too bad the Patriot can't shoot down an obsolete Seersucker that hit Kuwait City getting past AWACS, Aegis, and Patriot sensors without being seen.



The last one in 2003, right?

[PiSigma]

to tphuang
o cool, i'm just glad numerical methods is required learning for most engineering disciplines now. the designers must be pretty dumb to forget something so important. especially when it's the basics.
for those of you that don't know what we are talking about. accumulating fractions by computer system is saying that instead of keeping all decimals in the computer memory( because sometimes you can't), the computer round off or cut off numbers it deemed insignificant, usually after several decimal places. and after awhile, the error builds on itself. it's like building a building, and the materials used are always 1 mm shorter than specified, by the end you get a building that's 2 meters shorter than you wanted, and the people that build it don't know why.

[Totoro]

for those of you that don't know what we are talking about. accumulating fractions by computer system is saying that instead of keeping all decimals in the computer memory( because sometimes you can't), the computer round off or cut off numbers it deemed insignificant, usually after several decimal places. and after awhile, the error builds on itself. it's like building a building, and the materials used are always 1 mm shorter than specified, by the end you get a building that's 2 meters shorter than you wanted, and the people that build it don't know why.

Is it a viable option to have an algorithm which would monitor the data and then try to guess the figures that have been cut off? Then periodically just add that guesswork sum to the data, trying to make it more accurate. Would that require more memory/cpu processing than not cutting off and rounding the figures?

[tphuang]

Is it a viable option to have an algorithm which would monitor the data and then try to guess the figures that have been cut off? Then periodically just add that guesswork sum to the data, trying to make it more accurate. Would that require more memory/cpu processing than not cutting off and rounding the figures?
that's what is suppose to happen. Even the computer clocks are not exactly on time, so you have to continually synchronize and make up the differences.