Arma bomb detonation midair

[thisTrigger] spawn {
  if (( getposatl vehicle player) select 2 > 500) then{
    private _position = vehicle player getRelPos [0,0];
    private _newPos = _position vectorAdd [0,0,1000];
    _missileDir = _newpos vectorFromTo getPosATL vehicle player;
    _missile = createVehicle ["vn_bomb_2000_mk84_he_ammo", _newpos, [], 0, "CAN_COLLIDE"];
  triggerammo _missile;
   [_missile, vehicle player] spawn {
    params ["_missile", "_tgt"];
    sleep 0.1;
    _missile setMissileTarget _tgt;
          };
    }else{};
}