[bostonsre]

It was picked up on radar over several different days and a training mission was scrubbed so that they could go investigate what they saw on radar.

You don't think humans could get better at judging distance of objects with practice? It seems like if any humans on earth could reliably do it, it would be seasoned fighter pilots that have thousands of hours of experience doing that exact thing.

[stouset]

We fundamentally don't have the hardware capable of doing it. So we use context clues and intuition. And both of those can easily be misleading.