Characteristics of Lightning Current of Rocket-Triggered Lightning

In the case of negative ambient electric field, traditional rocket-triggered lightningmainly includes upward positive leader (UPL), initial continuous current (ICC), one or more downward-leader-upward-return-stroke sequences, continuous current and M component, etc. Among them, the upward positive leader and continuous current constitute the initial discharge process (IS). The initial discharge process lasts tens to hundreds of milliseconds, and the current pulse superimposed on the initial continuous current is called the ICC pulse, similar to the M component. M component pulse overlap the continuing current. Before the continuous development of the upward leader begins, the attempted breakdown at the top end of the wire causes the sequence of precursor pulses.