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#101
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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. |
#102
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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... :-) |
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