In message , phil hunt
writes
On Sun, 26 Oct 2003 12:34:30 +0000, Paul J. Adam news@jrwlyn
ch.demon.co.uk wrote:
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:

Multiple measurements will give you this.

Sure, but this takes *time*, which you don't have by definition for a
snapshot. You can in theory use passive acoustics to track aircraft,
given enough time, but theoretical possibility hasn't translated yet
into useful application.

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

If it works, why not?

Cost, weight, and the fact that you usually die before you get to use
it?

--
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