I tried that before. Didn't work. The missile/gun that would be guided on the target would fall short.
In any case, I've been noticing this a few times, I like to take my time to complete a mission, and after a while the laser starts producing erroneous data. Especially a problem if you saved that last Vikhr for that one last AA unit, and after fumbling around with 100 different settings (restarting laser, relocking, etc etc), finally getting a lock, firing the missile... and see it punch a hole in the ground because it just fell to earth (no, I didn't put ATGM in manual or any of that).
-Z