"regarding your earlier rules question, I would treat it as a standard ground-to-air attack. The liftoff takes place during the aerospace unit's movement phase as though it were a ground unit, and--like all ground units in combat--the firing phase accounts for ground movement and final position at the end thereof. As the aerospace unit ends the Movement Phase as a unit on the low alt map, it is an aerospace unit f"(assuming) from that point on.
Quoted from Herb in battlechat Saturday 4/30/2011
