PLA AEW&C, SIGINT, EW and MPA thread

[crobato]

You have to understand two seeker systems cannot work simultaneously---this would cause awful confusion to the missile. You only switch from one mode to another, and this can be referred to as phase mode guidance.

1. Radar or datalink guidance controls initial and midphase of flight. Once terminal, once the infrared seeker acquires target, it switches to infrared mode. If radar seeker gets spoofed, also switch to IR seeker.

2. If IR seeker gets spoofed, switch back to radar seeker.

3. If target is only suitable for radar interception, stay with radar seeker.

Welcome to the long line then, because there already has been many dual seeker missiles. The latest Standards for example, and the RAM. The Israeli Arrow 2. The Taiwanese HF-2 antiship missile.

Dual seeker is also used for anti ballistic interception by the same missile, since only IR can track a BM with sufficient speed and resolution. But if you want to intercept a very low flying cruise missile, you need high frequency radar seeker.

So what people do? They will also find ways to spoof even dual seeker mode missiles.

 

[lilzz]

You have to understand two seeker systems cannot work simultaneously---this would cause awful confusion to the missile. You only switch from one mode to another, and this can be referred to as phase mode guidance.

So what people do? They will also find ways to spoof even dual seeker mode missiles.

If you have two seeker then it will make it harder to be fooled.
the way I like to use is making the IR seeker as the main one,but if there are IR decoys and onboard profile can't distinguish what's decoys and real plane, then the radar got turned on to distinguish them. The radar sig of the IR decoys should be different than the plane.
Then the missile will continue to pursue the right target base on the new info.

So, the radar is more like a backup temp tool to distinguish among objects, it will make it so much harder for people spoof when you have can two separate tools to distiguish.

 

[crobato]

That's the intent, but people already beat you to this bright idea long time ago. And the countermeasures people have also long considered this too, so you can't say the dual system can be foolproof also.

Its not like aircraft can throw out both radar chaff and thermal decoys at the same time too.

 

[lilzz]

One thing about the F-22 detection is because the plane 's stealth 90% of that based faceting, it's much more stealthy on frontal and rear than the top and side.

If the AWACS see something on small RCS object /w its longwave radar, one of thing it can do is go higher altitude. If the object's RCS jump up quite a bit when AWACS goes higher altitude then pretty sure that object is a stealth plane.

 

[challenge]

why PLAAF decided to use cargo aircraft such as IL-76 as a AWACS platform rather than commercial civilian aircraft?
or do KJ-2000.like the A-50 suffer from "over weight" problem?

 

[crobato]

The question is more like why they choose to use Russian rather than Western aircraft. That is because there are contractual obligations when Western commercial aircraft are acquired that forbid them from military use. This is not withstanding that Western commercial contract can still be used by Communist Party officials for their own use, just like that B-737 that was decked out with satcom.

Besides, if you remember, China had one of B-737 refitted in the US to become the Presidential aircraft. Then it was discovered that the plane was literally bugged with CIA implanted listening devices. So that's another reason to be wary of using Western sourced aircraft for internal use.

Simply said the IL-76 has the capacity to be an AWACS for the same reason the Russians used the same plane to be their A-50. China also used Tu-154s as spy jets while keeping the jets in CUA civilian colors.

 

[beijingcar]

"Besides, if you remember, China had one of B-737 refitted in the US to become the Presidential aircraft. Then it was discovered that the plane was literally bugged with CIA implanted listening devices. So that's another reason to be wary of using Western sourced aircraft for internal use. "
I think it was the B-767 that was bugged, but your point holds true.

 

[crobato]

Four hangers for KJ-2000. I am assuming four KJ-2000s are in operation with the grey color. Another KJ-2000, the prototype marked 762, may still be with the CFTC for their own purposes. The CFTC KJ-2000 is the one likely made from the A-50I.

 

[AssassinsMace]

why PLAAF decided to use cargo aircraft such as IL-76 as a AWACS platform rather than commercial civilian aircraft?
or do KJ-2000.like the A-50 suffer from "over weight" problem?

Because most commercial aircraft in China is Western. Even though China has modified one that we know of for military use, it's a part of the agreement that any of these aircraft not be used by the military. If more were converted, the West would probably have to react.

 

[challenge]

Because most commercial aircraft in China is Western. Even though China has modified one that we know of for military use, it's a part of the agreement that any of these aircraft not be used by the military. If more were converted, the West would probably have to react.

soviet original opt for TU-226 civilian aircraft, but due to weight problem,they decided to settle for IL-76.due to her enourmous weight of LRU.it affected the performance of the aircraft,specially the range.
although newer improve version manage to reduce weight problem,example one LRU weight more than 700 lbs. been reduce to 200 plus weight,and use modern LCD display replacing cathoy-tube display.
giving this problem,one begin to suspect the PLAAF may have similiar problem.