mounted on the ground, shot remotely with either a long lanyard or an electrical trip system. but then, it probably won’t go higher than 200 feet. better a gun that can loft a projectile trailing a wire.
Would a model rocket (or a gun) be capable of towing a wire which is big enough to carry that sort of current without the wire getting incinerated in the process?
the rocket and wire vaporizes but there’s enough current to reach the grounding point. the rocket’s use is to induce a lightning discharge.