What you're talking about was being done a decade ago in the skies over Iraq. https://www.northropgrumman.com/what-we-do/mission-solutions/radars/an-zpy-5-vade

What you're talking about was being done a decade ago in the skies over Iraq. https://www.northropgrumman.com/what-we-do/mission-solutions/radars/an-zpy-5-vader-vehicle-and-dismount-exploitation https://www.northropgrumman.com/what-we-do/mission-solutions... I don't know jack about the algorithms because classified and not my job, but I can tell you that however good you think it was, it was better. I don't know if it's real or just marketing BS but what we said publicly was that differences in antennas, mirrors and trim were key in re-identifying vehicles after they leave the observable area (e.g. two silver Camry's go into a garage, come back out, how do you keep track which is which).