In message , phil hunt
writes
On Sat, 25 Oct 2003 09:16:05 +0100, Paul J. Adam news@jrwlync
h.demon.co.uk wrote:
Don't decoy the round, screw with the sight: that cannon is aimed by a
predictor system that needs target range and velocity data. Not hard at
all to have the gunsight generate the wrong pointing data.

Very, very difficult, assuming it's a passive sensor.

A passive sensor won't give you range and rate information, just bearing
(and you can get that from the pilot's eyeball). A laser rangefinder
will get you range and radial velocity, but not crossing velocity: while
you can use it to drive a gyro gunsight, that requires a tracking shot.
If you want an accurate snapshot capability (rather than spray-and-pray)
you're looking at radar.

A visual or IR
sensor can see the target -- a decoy would have to be the same size
and shape to work, at the rangres we're talking about. And the sight
could use a rangefinder to measure distance (e.g. 2 sights, one at
the ewnd of each wing, giving the parallax). This would be very
difficult to spoof.

All this for a fixed-axis, thousand-yard maximum range weapon?

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk