Singapore down selects three fighters...

On Sun, 26 Oct 2003 12:45:27 +0000, "Paul J. Adam"
wrote:

In message , Scott Ferrin
writes
On Sat, 25 Oct 2003 09:16:05 +0100, "Paul J. Adam"
wrote:
This also presupposes that you're able to get into parameters for a guns
shot... far from a given.

And it's assuming you don't get a dual mode seeker coming after you.
One of the Standards has both semi-active radar AND IR and they'd
kicked around the idea of putting one on Sparrow. Wouldn't be too
difficult to pull of if they felt it necessary.

Does offer complications, however. Which sensor is in charge and which
is the backup? (It's thoroughly feasible, but has a few wrinkles in the
implementation: sensor fusion is a tricky art)



The idea is that if it's using something like a decoy on a string the
IIR seeker won't see an airplane where the signal is coming from. The
decoy won't keep the radar seeker from seeing the airplane, it just
tries to present a more appealing target. So the IIR seeker sees that
from the decoy's position there definitely ain't an airplane there but
there IS something resembling an airplane a few hundred feet up the
wire that still has a return but maybe not as enticing as the one on
the decoy. So the software says "okay ignore the decoy, that aint the
target". I'm not sure how they deal with missiles that have IIR
seekers but if they start popping flares the radar seeker won't see a
radar return who's signiture is changing as it would be from a
maneuvering aircraft so it ignores the flares. If they put a heat
source in the decoy on a string the missile would see it and though it
might have a radar return and a nice hot source, the IIR seeker would
see that it's a point source and ignore it. Basically the seekers
work in unison and winnow down the presented targets to find the one
that satisfies the criteria for BOTH seekers. If you had a mmw radar
in the seeker it would seem to make it even more difficult for the
defenses because how do you emulate the return off an aircraft of a
high res seeker? Both the radar and the IR seekers would have the
resolution to tell if what they were looking at WAS in fact an
airplane. If they used a laser to burn out the IIR seeker the missile
would note that it's IIR seeker is out of commission and rely on the
radar alone. Even stilll the decoy would have to convince the mmw
radar that it was looking at an aircraft and not a point source.

AL wrote in message ...
Yes, the newest F-15s is most impressive. But there isn't any planned
future development. All funds are directed towards F-35.

Well... There is Israel's Elbit Systems... :-)