if you crack open piratez.rul and start modding the game files you can change the SMALL_RADAR_SYSTEM in the starting base to a HYPER_WAVE_DECODER. having a Hyperwave from gamestart allows you to see that, while usually the first few months have civilian traffic or academy airbus/ambulance or the occasional harvester or scout passenger hopper...sometimes it's a Heavy Funship full of Mercenaries
that early on, there is literally nothing you have access to that can even break their shields/armor, nevermind damage them enough to stun/kill. only thing you can do at that point is let them fly around unmolested, let them land and do their merc stuff. can't stop them, will only get killed if you try.
this, too, is xcom xpiratez