View Single Post
  #49  
Old October 14th 03, 02:22 AM
Chad Irby
external usenet poster
 
Posts: n/a
Default

In article ,
(Denyav) wrote:

For one thing, because you really can't (wavelength considerations alone
make that a ridiculous claim), and even if you could, you'd get a screen
full of noise.


Thats true,but only if you use radar as amplitute based classical binary
detection method (conventional radar).
But if you start to consider radar as a data carrier and process,for example
polarimetric data,you can easily filter out the noise.


Until someone spends a few watts spoofing you out of your shoes.

Regarding ridiculousness of claim,this claim was the talk of the town
last year somewhere in East Coast.


Lots of things have been "talk of the town" for a week or so, until
someone did the actual work and found out how silly it was. The "we can
use cell phone signals to find B-2s" story died a quick death last year
after someone did the math on it.

Lets say only sofar, the frontal RCS of both B2 and F22 is 0,0001 sqm
but both of them could be easily detected,tracked (and imaged) by US
multistatic system,which is optimized for the next generation
stealthy cruise missiles and UCAVs.


Actually, the current multistatic has only worked (at all) on targets of
about ten thousand times the size of modern stealth planes, and only
under controlled circumstances. And it's not the "look at noise and
decode it" system you're touting - it's a multiple-emitter *active*
radar system.

Why ? Because current RCS definition has a meaning only if you face
backscatterers,if you face multistatics thats different story.


There's no real evidence to support this. Just more handwaving.

As I posted before,for meaningful backscatterer radar detection range
reductions you need an echo reduction at least in order of 10000
whereas the best RAMs today offer only reduction in order of 100.
RAMs are a stealth designers Band-Aids,they use them only if
everything else fails,the weapon of every passive stealth platform
designer is the "Hardbody Shaping".


Nope. It's a *system* approach, since no body can be 100% "correctly"
shaped, and since good radar absorbing materials can give huge
advantages in and of themselves.

Probably you wont see any RAMs,RASs etc in the platforms of future
because of the development of HPM weapons.


That's exactly the opposite of what *everyone* says.

If you face HPM weapons the last thing that you may want is to absorb their
energy.


Even a 98% effective "reflector" would get vaporized at high enough
power levels.

HPMs aren't going to be big antiair systems, anyway. For line of sight,
you need plain old lasers.

Spoofing? Well it depends,if you know the location receiver lt might be
easier.
But do Stealth planes need ECM support like lowly counterparts?


Absolutely. Even the best of stealth has *some* return. A lot RCS
gives you a *huge* defensive ECM advantage. For one, you can use very
low power transmitters (and a lot more of them). And since you're
looking at odd reflection angles, you can pretty much idsappear in the
noise.

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.