I am not quite that naive.
I am well aware of what military "target aquisition radar" is. I was not proposing canibalising a Tornado. Lets forget the military stuff & try from another direction.
Some altimeters are
expensive & are hooked up to
expensive transponders, other altimeters are
cheap & can be strapped to ones wrist so one can leap from an a/c & know roughly when to pull the string.
Both read altitude.
Now,
current primary radar systems are expensive, complex, heavy, big etc. So I don't propose ransacking West Drayton.
However, intruder alarm systems have a very short range, could that be improved? infrared cameras have a slightly longer range, could that be improved? Some expensive cars I believe are fitted with proximity detection systems to prevent rear ending the guy in front, how much £ & how far in front?
I'm sorry I am merely a thinking person, I am a retired toolmaker / machine designer, I am not an electronics man at all. but I can think "what if, based on current technology?"
OK it may not be possible, certainly if CAA certification has to be considered, price wise. So much for progress. But a few years ago TCAS wasn't possible.
I suppose we just have to wait, grin & bear it, pay up, shut up & generally cowtow to them what know better.
Would Mr Trevor Bayliss please stand up!!