henry@zoo.toronto.edu (Henry Spencer) (01/27/91)
From: henry@zoo.toronto.edu (Henry Spencer) >From: dnwiebe@cis.ohio-state.edu (Dan N Wiebe) >... One of the features of >both of these simulators is a pair of EWRs (one for radar, one for IR) >each with three warning lights--search, targeting, and guidance... >... how does the IR thingy work? I was under the >impression that IR homing devices are passive, rather than active. Correct. I think somebody's gotten carried away. >How do you tell when IR energy from your aircraft is being absorbed >by a missile's seeker head, rather than by the ground or air? Beyond >that, how do you tell what it's being used for once it's absorbed... You don't. >... he says that these IR warning >devices really do exist... *Probably* what he is thinking of is a slightly different story. There are gadgets that will warn of a missile launch by picking up the IR emissions of the missile exhaust. They don't tell you whether it's pointed at you, or what form of guidance it uses, but a missile fired in your vicinity is cause for concern regardless of details. -- If the Space Shuttle was the answer, | Henry Spencer at U of Toronto Zoology what was the question? | henry@zoo.toronto.edu utzoo!henry
gwh%soda.Berkeley.EDU@ucbvax.Berkeley.EDU (George William Herbert) (01/28/91)
From: gwh%soda.Berkeley.EDU@ucbvax.Berkeley.EDU (George William Herbert) In article <1991Jan27.111516.28781@cbnews.att.com> henry@zoo.toronto.edu (Henry Spencer) writes: >>... he says that these IR warning >>devices really do exist... > >*Probably* what he is thinking of is a slightly different story. There >are gadgets that will warn of a missile launch by picking up the IR >emissions of the missile exhaust. They don't tell you whether it's pointed >at you, or what form of guidance it uses, but a missile fired in your >vicinity is cause for concern regardless of details. This is the case. US fighters since the F-111 have had rear-looking IR sensors that look for hot gases (missile exhaust, jet-engine-airplane sneaking up behind, etc). The French deploy one such system as part of the launch rail for their IR missile on the new Mirage 2000's: it looks like a prism poking out a bit, with sensors inside it. == George William Herbert == * UNIX ate my last .sig, Waiting for Plan 9! * == JOAT for Hire: Anything, == ######### I do Naval Architecture, ########## ===+++ Anywhere, my price +++=== # Spacecraft Design, UNIX Systems Consulting # == gwh@soda.berkeley.edu == # RPG writing/development, and lots of other # == gwh@ocf.berkeley.edu == ## random stuff, of course. I'm a JOAT 8-) ##