ThinkPad R - can you give any details why there arent any radar systems that could do it ? Because while browsing google i've came accross a rather fascinating patent http://www.freepatentsonline.com/3906495.html - although this is just a patent (from the mid 70's) it is a possibility that it would work (as I am not familiar with current radars - they might actualy implement this technology).
http://www.freepatentsonline.com/5607379.pdf
Heres something that I invented years ago that could help those fighter pilots have an edge through physical superiority, which is a big part of being a fighter pilot.
I'm just sayin





