[Kozak]

Friendly air assets have IFF transponders, don't have the profile of a projectile in flight. That shouldn't be a problem.

[Reaganesque]

One potential problem is that if the laser fires at a low flying mortar round, the beam doesn't just destroy the target but some of its energy will continue on beyond the target and could cause some collateral damage to anything that may be "behind" the shell at the time. But then, if it's on auto fire, you can program it to not fire until the projectile has cleared the background buildings.

Another interesting question: If MTHEL has sufficient range, a clear field of view and a high priority human target heaves into view, do we take the shot? Hmmmm. I think I would vote yes on that.

[Marine_Uncle]

"Friendly air assets have IFF transponders, don't have the profile of a projectile in flight. That shouldn't be a problem."
Well radar will not recognize IFF signal. IFF is a low frequency radio frequency relative to the frequency range of the radar, however as you indicated, if the firmware in the radar computer is programed to track only certain type trajectory paths, and speed envelopes, then perhaps my comment is simply a mute point. For example, anything flying less then say 300 knots in horz/vertical gets ignored, e.g. no lock on that identity. Guess we shall see more on this system as time goes by.