[Joe Johnson]

This is a very difficult problem.

The solution to this problem was a state secret during WW2. Essentially you are trying to solve the gunsite problem. WW2 era anti-aircraft gunsite had mechanical computers inside that would point the bullets not where the planes are, but where they would be in when the bullets arrived.

I don't want to discourage you, but it is a tough nut to crack.

Joe J.