Missile Guidance

Originally posted by DukeC Originally posted by Erdene Btw, I am downloading Behind Enemy Lines I am pretty sure that the missile fired something and whatever it was it had a shot gun effect on the tail section.�� � Some SAMs and AAMs are fused so the blast from the warhead can be directed at the target. I'm not sure of the technical details on this.

the longer the range, the longer the missile, look at S-400, the missile is 3-4 tons, so that it can fly farther, when it comes close to enemy aircraft, it explodes, and some missiles have shotgun effect, when a lot of little particles damage an aircraft, I dunno how they direct it either, some are calculated so that the wave of explosion damages aircraft and some systems, like Patriot PAC3 are hit-to-kill systems, but this reduces range dramatically, when you actually hit the aircraft with a rocket and then it explodes.
    
    
    

Edited by Russian - 22-May-2006 at 21:46

Originally posted by bigtoothbrush chinese HQ-9(FT-2000) is one the most advanced long-range, all-altitude, all-weather surface-to-air missile�in the world. its terminal guidance is active radar�track,�thus it doesn't need any illuminator for fire control. but it still keep�semi-active radar track function, to increase its anti-jam capability. it also could work under passive mode,�as an anti-radiation to destroy AWACS or even ground-based�radars. there are�both ground verion and navy version are in service�right now.�the future�version may add IR imaging�focal plane array�for reinforce�terminal guidance.� just need�one�Active Phase Array Radar, it�could finish all the information supporting and guidance�jobs. while most�countries'�air defence�missiles need 6~8 different radars to do these jobs. land version�� navy version �

    

that's funny post, lol, Russian S-400 is MOST advanced land to air missile, Russia is ahead of other countries in air defence my friend, much more ahead.
    

S-400 can shoot everything your HQ-9 can shoot and it also can shoot down SCUD and any other short range ballistic missile pr even medium range missiles, can you system do that?

What is the range of your system? 200 km, twice less that S-400, buddy, it is not nearly as good, it is merely a copy of S-300, lol, it uses S-300 launchers and probalby copies of russian missiles, it is NOT the most advanced.

Russia has S-300PMU-2, S-300V, S-400, US has PAC-3, it is also more advanced, although not as long range.

Here, read please:

"The HQ-9 was initially developed to replace the PLA’s bulk of obsolete HQ-2 (Chinese copy of the Soviet/Russian SA-2 Guideline), but the slow progress in the development forced the PLA to purchase the S-300PMU missile from Russia. By the time the HQ-9 was ready for operational deployment in the late 1990s, the missile was already behind foreign air-defence missiles such as U.S. PAC3 and Russian S-300PMU2 in terms of technology and performance. Only a small number of the HQ-9A are being deployed by the PLA for operational trial and evaluations. The naval variant of the HQ-9A is deployed onboard the Type 052C destroyer which was commissioned in 2004."

reference:

http://www.sinodefence.com/army/surfacetoairmissile/hq9.asp
    
    

Edited by Russian - 20-May-2006 at 12:24

Lead Angle Computation is by to compute the angle between missile's line of sight and target's moving direction. While Proportional navigation's is about the angle between missile's line of sight and the line between missile and target.  

IR guidance missiles are easy to operate due to their fire forget function. but you can't launch several  IR missiles to deal with several targets at the same time. coz all these missiles will just go for the target with most obvious IR signals.

current most advanced shoulder-held missiles such as chinese QW-4, all use IR imaging seeker. it can't be fool since it's terminal informations are targets imagines. one can simulate signals power and frequency, but can't simulate targets imagines.

all passive guidance ones are fire forget, but too easy to be fool unless fit with imaging array or cooperated by other guidance model. while it's impossible to jam semi-active tracked missiles such as RBS 70.

Which system does stinger and other small shoulder-held missiles use???

Originally posted by Erdene So the missile doesn't actually hit its target...it explodes in a proximity to the target??? The force from the explosion damages and downs the target????

Correct.  Counting on a direct hit is too risky when you have two objects moving above or close to the speed of sound.  Often the missile will hit the aircraft, but a proximity fuze increases your chances so much more of killing the target.

Originally posted by Leonidas actaually does sensor fusing which im hearing about quite allot  out of the USA change the way it gets guided? is there a strict rule between the sensor used and the guidance methodolgy?

The fuze is just what detonates the warhead when it hits or comes close to the traget, and is to a large extent an autonomous subsystem of the missile, which although similar to is not the same as the guidance system.  The guidance system gets the missile to within lethal range of the target, the fuze then detonates it when it comes within lethal range.

The early Sidewinders used optical fuzes, and others used infrared fuzes to detect distance to target.  Sparrows used radio frequency fuzes.  The Soviet R-60/AA-8 Aphid AAM had infrared guidance with a radar proximity fuze.  Most missiles also have a back up contact fuze. 

 

Edited by Genghis

actaually does sensor fusing which im hearing about quite allot  out of the USA change the way it gets guided? is there a strict rule between the sensor used and the guidance methodolgy?

Originally posted by Genghis I take it no one finds missile guidance as interesting as I do?

I find it very interesting mate .... i always wondered how in da f**k do they guide em ... and i never actually got down to doing some research on it .... but now u've explained, thx