The ground player's armor/buff/specials/abilities has no mitigation/reduction effect to the amount of damage done by a ship gun.
Vehicles/mounts/pets cannot be attacked by ship gun, but players (including passengers on multi-passenger vehicles) mounted on vehicle/mount can still be attacked by ship gun.
Air <-> Ground PvP range is 500m.
Air <-> Ground PvP is not allowed if the ground player is inside a battlefield.
Air <-> Ground PvP uses the space ruleset (for example, for guild war kill tracking, guild war exclusion, player bounty, etc). This means that GCW score contribution earned through Air <-> Ground PvP will go to the corresponding space *Player vs. Player and "airspace" GCW score categories.
The /spacepvpimperial and /spacepvprebel commands cannot be used while the ship is in the Restuss PvP region airspace.
Atmospheric Flight Air <-> Ground PvP pt.3: